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145-843: The River Swale in Yorkshire , England, is a major tributary of the River Ure , which becomes the River Ouse , that empties into the North Sea via the Humber Estuary. The river gives its name to Swaledale , the valley through which it flows. The river and its valley are home to many types of flora and fauna typical to the Yorkshire Dales . Like similar rivers in the region, the river carves through several types of rock and has features typical of both river and glacial erosion . The River Swale has been

290-431: A 100 kyr Milankovitch cycle , and so each cyclothem represents a cycle of sea level fall and rise over a 100 kyr period. Coal forms when organic matter builds up in waterlogged, anoxic swamps, known as peat mires, and is then buried, compressing the peat into coal. The majority of Earth's coal deposits were formed during the late Carboniferous and early Permian. The plants from which they formed contributed to changes in

435-480: A contributory factor in the settlements that have been recorded throughout its history. It has provided water to aid in the raising of crops and livestock, but also in the various mining activities that have occurred since Roman times and before. The river is said to be the fastest flowing in England and its levels have been known to rise 10 feet (3 m) in 20 minutes. Annual rainfall figures average 1800 mm p.a. in

580-773: A cottage industry, centred on the old market towns moved to the West Riding where entrepreneurs were building mills that took advantage of water power gained by harnessing the rivers and streams flowing from the Pennines . The developing textile industry helped Wakefield and Halifax grow. The 19th century saw Yorkshire's continued growth, with the population growing and the Industrial Revolution continuing with prominent industries in coal, textile and steel (especially in Sheffield , Rotherham and Middlesbrough ). However, despite

725-481: A defined GSSP. The fusulinid Aljutovella aljutovica can be used to define the base of the Moscovian across the northern and eastern margins of Pangea, however, it is restricted in geographic area, which means it cannot be used for global correlations. The first appearance of the conodonts Declinognathodus donetzianus or Idiognathoides postsulcatus have been proposed as a boundary marking species and potential sites in

870-468: A major role in the economy of the river valley. The Yorkshire Dales Cycle Way follows the valley between Fremington and Gunnerside. The Coast to Coast Walk passes through Richmond to Reeth and is crossed at Keld by the Pennine Way , which goes through the upper valley from Buttertubs Pass to Muker. Yorkshire Yorkshire ( / ˈ j ɔːr k ʃ ər , - ʃ ɪər / YORK -shər, -⁠sheer )

1015-573: A separate kingdom. The Wessex Kings of England were reputed to have respected the Norse customs in Yorkshire and left law-making in the hands of the local aristocracy. In the weeks leading up to the Battle of Hastings in 1066 AD, Harold II of England was distracted by pushing back efforts to reinstate the kingdom of Jorvik and Danelaw. His brother Tostig and Harald Hardrada , King of Norway , having won

1160-431: A shallow, tropical seaway which stretched from Southern California to Alaska. The boundary is within a cyclothem sequence of transgressive limestones and fine sandstones , and regressive mudstones and brecciated limestones. The Moscovian Stage is named after shallow marine limestones and colourful clays found around Moscow, Russia. It was first introduced by Sergei Nikitin in 1890. The Moscovian currently lacks

1305-451: A single sedimentary cycle, with an erosional surface at its base. Whilst individual cyclothems are often only metres to a few tens of metres thick, cyclothem sequences can be many hundreds to thousands of metres thick and contain tens to hundreds of individual cyclothems. Cyclothems were deposited along continental shelves where the very gentle gradient of the shelves meant even small changes in sea level led to large advances or retreats of

1450-571: A third of the population. When King Richard II was overthrown in 1399, antagonism between the House of York and the House of Lancaster , both branches of the royal House of Plantagenet , began to emerge. Eventually the two houses fought for the throne of England in a series of civil wars, commonly known as the Wars of the Roses . Some of the battles took place in Yorkshire, such as those at Wakefield and Towton ,

1595-535: A trio of very prominent and popular summits (the Yorkshire Three Peaks ) which can be climbed in a challenging single day's walk. The highest point in the Yorkshire part of the Peak District is Black Hill (height 582 metres (1,909 ft)) on the border with historic Cheshire (which also forms the historic county top of that county). The hill ranges along the eastern side of Yorkshire are lower than those of

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1740-624: A tropical wetland environment. Extensive coal deposits developed within the cyclothem sequences that dominated the Pennsylvanian sedimentary basins associated with the growing orogenic belt. Subduction of the Panthalassic oceanic plate along its western margin resulted in the Antler orogeny in the Late Devonian to Early Mississippian. Further north along the margin, slab roll-back , beginning in

1885-423: A variety of methods for reconstructing past atmospheric oxygen levels, including the charcoal record, halite gas inclusions, burial rates of organic carbon and pyrite , carbon isotopes of organic material, isotope mass balance and forward modelling. Depending on the preservation of source material, some techniques represent moments in time (e.g. halite gas inclusions), whilst others have a wider time range (e.g.

2030-542: A vast expanse of the Yorkshire lowlands with the Pennines forming a backdrop. It was called the "finest view in England" by local author and veterinary surgeon James Herriot in his 1979 guidebook James Herriot's Yorkshire . The Royal Society for the Protection of Birds runs nature reserves such as the one at Bempton Cliffs with coastal wildlife such as the northern gannet , Atlantic puffin and razorbill . Spurn Point

2175-725: A warmer climate. This rapid rise in CO 2 may have been due to a peak in pyroclastic volcanism and/or a reduction in burial of terrestrial organic matter. The LPIA peaked across the Carboniferous-Permian boundary. Widespread glacial deposits are found across South America, western and central Africa, Antarctica, Australia, Tasmania, the Arabian Peninsula, India, and the Cimmerian blocks, indicating trans-continental ice sheets across southern Gondwana that reached to sea-level. In response to

2320-506: Is a narrow 3-mile (4.8 km) long sand spit . It is a national nature reserve owned by the Yorkshire Wildlife Trust and is noted for its cyclical nature whereby the spit is destroyed and re-created approximately once every 250 years. There are seaside resorts in Yorkshire with sandy beaches; Scarborough is Britain's oldest seaside resort dating back to the spa town -era in the 17th century, while Whitby has been voted as

2465-403: Is an area of Northern England which was historically a county . Despite no longer being used for administration, Yorkshire retains a strong regional identity. The county was named after its original county town , the city of York . The south-west of Yorkshire is densely populated, and includes the cities of Leeds , Sheffield , Bradford , Doncaster and Wakefield . The north and east of

2610-508: Is located in Bed 83 of the sequence of dark grey limestones and shales at the Pengchong section, Guangxi , southern China. It is defined by the first appearance of the fusulinid Eoparastaffella simplex in the evolutionary lineage Eoparastaffella ovalis – Eoparastaffella simplex and was ratified in 2009. The Serpukhovian Stage was proposed in 1890 by Russian stratigrapher Sergei Nikitin . It

2755-517: Is named after the Russian village of Gzhel , near Ramenskoye , not far from Moscow. The name and type locality were defined by Sergei Nikitin in 1890. The Gzhelian currently lacks a defined GSSP. The first appearance of the fusulinid Rauserites rossicus and Rauserites stuckenbergi can be used in the Boreal Sea and Paleo-Tethyan regions but not eastern Pangea or Panthalassa margins. Potential sites in

2900-438: Is named after the city of Serpukhov , near Moscow. currently lacks a defined GSSP. The Visean-Serpukhovian boundary coincides with a major period of glaciation. The resulting sea level fall and climatic changes led to the loss of connections between marine basins and endemism of marine fauna across the Russian margin. This means changes in biota are environmental rather than evolutionary making wider correlation difficult. Work

3045-498: Is not, as is sometimes claimed, the highest waterfall in England ( Hardraw Force in Wensleydale , also in Yorkshire, has a 30 metres (98 ft) drop for example). However, High Force is unusual in being on a major river and carries a greater volume of water than any higher waterfall in England. The highest mountains in Yorkshire all lie in the Pennines on the western side of the county, with millstone grit and limestone forming

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3190-564: Is now York and renamed it Jórvík , making it the capital city of a new Danish kingdom under the same name. The area which this kingdom covered included most of Southern Northumbria, roughly equivalent to the borders of Yorkshire extending further West. The Danes went on to conquer an even larger area of England that afterwards became known as the Danelaw ; but whereas most of the Danelaw was still English land, albeit in submission to Viking overlords, it

3335-487: Is sometimes referred to as "God's own country". Yorkshire is represented in sport by Yorkshire County Cricket Club and Yorkshire Rugby Football Union . There are several ways of defining Yorkshire, including the historic county and the group of four modern ceremonial counties. The county boundaries were reasonably stable between 1182, when it ceded western areas to the new county of Lancashire, and 1889 when administrative counties were created, which saw some adjustments to

3480-601: Is supported by the fact that yew trees were once abundant in the area around York, and that the city was known for its skilled bow makers who used yew wood to make their bows. This became 'Eboracum' to the Romans , 'Eorfowic' to the Angles and then, most famously, 'Jorvik' to the Vikings . Secondly, and much less reliable, is that it may come from the Old English word "Eow", which referred to

3625-626: Is that a delay between the development of trees with the wood fibre lignin and the subsequent evolution of lignin-degrading fungi gave a period of time where vast amounts of lignin-based organic material could accumulate. Genetic analysis of basidiomycete fungi, which have enzymes capable of breaking down lignin, supports this theory by suggesting this fungi evolved in the Permian. However, significant Mesozoic and Cenozoic coal deposits formed after lignin-digesting fungi had become well established, and fungal degradation of lignin may have already evolved by

3770-643: Is underway in the Urals and Nashui, Guizhou Province, southwestern China for a suitable site for the GSSP with the proposed definition for the base of the Serpukhovian as the first appearance of conodont Lochriea ziegleri . The Pennsylvanian was proposed by J.J.Stevenson in 1888, named after the widespread coal-rich strata found across the state of Pennsylvania. The closure of the Rheic Ocean and formation of Pangea during

3915-541: The Battle of Fulford . The King of England marched north where the two armies met at the Battle of Stamford Bridge . Tostig and Hardrada were both killed and their army was defeated decisively. Harold Godwinson was forced immediately to march his army south, where William the Conqueror was landing. The King was defeated in what is now known as the Battle of Hastings , which led to the Norman conquest of England . The people of

4060-588: The Brigantes (known to be in the north and western areas of now Yorkshire) and the Parisi (present-day East Riding ). The Brigantes controlled territory that later became all of Northern England and more territory than most Celtic tribes on the island of Great Britain . Six of the nine Brigantian poleis described by Claudius Ptolemaeus in the Geographia fall within the historic county. The Parisi, who controlled

4205-668: The Dissolution of the Monasteries in 1536 led to a popular uprising known as Pilgrimage of Grace , started in Yorkshire as a protest. Some Catholics in Yorkshire continued to practise their religion and those caught were executed during the reign of Elizabeth I . One such person was a York woman named Margaret Clitherow who was later canonised . During the English Civil War , which started in 1642, Yorkshire had divided loyalties; Hull (full name Kingston upon Hull ) famously shut

4350-688: The Gulf of Mexico in the west to Turkey in the east. The orogeny was caused by a series of continental collisions between Laurussia, Gondwana and the Armorican Terrane Assemblage (much of modern-day Central and Western Europe including Iberia ) as the Rheic Ocean closed and Pangea formed. This mountain building process began in the Middle Devonian and continued into the early Permian. The Armorican terranes rifted away from Gondwana during

4495-721: The International Commission on Stratigraphy (ICS) stage, but the Viséan is longer, extending into the lower Serpukhovian . North American geologists recognised a similar stratigraphy but divided it into two systems rather than one. These are the lower carbonate-rich sequence of the Mississippian System and the upper siliciclastic and coal-rich sequence of the Pennsylvanian . The United States Geological Survey officially recognised these two systems in 1953. In Russia, in

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4640-661: The Kuznetsk Basin . The northwest to eastern margins of Siberia were passive margins along the Mongol-Okhotsk Ocean on the far side of which lay Amuria. From the mid Carboniferous, subduction zones with associated magmatic arcs developed along both margins of the ocean. The southwestern margin of Siberia was the site of a long lasting and complex accretionary orogen. The Devonian to early Carboniferous Siberian and South Chinese Altai accretionary complexes developed above an east-dipping subduction zone, whilst further south,

4785-566: The Magnitogorsk island arc , which lay between Kazakhstania and Laurussia in the Ural Ocean , collided with the passive margin of northeastern Laurussia ( Baltica craton ). The suture zone between the former island arc complex and the continental margin formed the Main Uralian Fault , a major structure that runs for more than 2,000 km along the orogen. Accretion of the island arc

4930-684: The North York Moors and Yorkshire Dales National Parks , and part of the Peak District National Park. Nidderdale and the Howardian Hills are designated Areas of Outstanding Natural Beauty , as is the North Pennines (a part of which lies within the county). Spurn Point, Flamborough Head and the coastal North York Moors are designated Heritage Coast areas, and are noted for their scenic views with rugged cliffs such as

5075-653: The Old Red Sandstone , Carboniferous Limestone , Millstone Grit and the Coal Measures . These four units were placed into a formalised Carboniferous unit by William Conybeare and William Phillips in 1822 and then into the Carboniferous System by Phillips in 1835. The Old Red Sandstone was later considered Devonian in age. The similarity in successions between the British Isles and Western Europe led to

5220-857: The River Derwent rises on the North York Moors, flows south then westwards through the Vale of Pickering then turns south again to drain the eastern part of the Vale of York. It empties into the River Ouse at Barmby on the Marsh . In the far north of the county the River Tees flows eastwards through Teesdale and empties its waters into the North Sea downstream of Middlesbrough . The smaller River Esk flows from west to east at

5365-539: The River Ure . The River Swale and its valley support a range of habitats including broadleaved, mixed and conifer woodland as well as hay meadows and grasslands. Limestone scar, bracken, scrub and heather moorland can also be found. Amongst the species of tree that can be found are ash , birch , rowan and bird cherry along with shrubs such as hawthorn , hazel and holly . There are smaller populations of yew and sycamore . Pine , larch and spruce occur mostly in plantations with alder and willow common along

5510-563: The Roman Empire from Eboracum for the two years before his death. Another emperor, Constantius Chlorus , died in Eboracum during a visit in 306 AD. Thereafter his son Constantine the Great , who became renowned for his acceptance of Christianity, was proclaimed emperor in the city. In the early 5th century, Roman rule ceased with the withdrawal of the last active Roman troops. By this stage,

5655-602: The governance section below. For most administrative purposes the county had been divided since the Middle Ages; the last county-wide administrative role was the Sheriff of Yorkshire . The sheriff had been a powerful position in the Middle Ages but gradually lost most of its functions, and by the twentieth century was a largely ceremonial role. It was abolished as part of the 1974 reforms to local government, which established instead high sheriffs for each modern county. Historically,

5800-522: The jet cliffs at Whitby, the limestone cliffs at Filey and the chalk cliffs at Flamborough Head. Moor House – Upper Teesdale, most of which is part of the former North Riding of Yorkshire, is one of England's largest national nature reserves . At High Force on the border with County Durham, the River Tees plunges 22 metres (72 ft) over the Whin Sill (an intrusion of igneous rock). High Force

5945-747: The 1840s British and Russian geologists divided the Carboniferous into the Lower, Middle and Upper series based on Russian sequences. In the 1890s these became the Dinantian, Moscovian and Uralian stages. The Serpukivian was proposed as part of the Lower Carboniferous, and the Upper Carboniferous was divided into the Moscovian and Gzhelian . The Bashkirian was added in 1934. In 1975, the ICS formally ratified

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6090-520: The Bashkirian, the late Moscovian and the latest Kasimovian to mid-Gzhelian are inferred from the disappearance of glacial sediments, the appearance of deglaciation deposits and rises in sea levels. In the early Kasimovian there was short-lived (<1 million years) intense period of glaciation, with atmospheric CO 2 concentration levels dropping as low as 180 ppm. This ended suddenly as a rapid increase in CO 2 concentrations to c. 600 ppm resulted in

6235-663: The Carboniferous Earth's atmosphere, and the coal fueled the Industrial Revolution . During the Pennsylvanian, vast amounts of organic debris accumulated in the peat mires that formed across the low-lying, humid equatorial wetlands of the foreland basins of the Central Pangean Mountains in Laurussia, and around the margins of the North and South China cratons. During glacial periods, low sea levels exposed large areas of

6380-415: The Carboniferous System, with the Mississippian and Pennsylvanian subsystems from the North American timescale, the Tournaisian and Visean stages from the Western European and the Serpukhovian, Bashkirian, Moscovian, Kasimovian and Gzhelian from the Russian. With the formal ratification of the Carboniferous System, the Dinantian, Silesian, Namurian, Westphalian and Stephanian became redundant terms, although

6525-429: The Carboniferous, the Tarim craton lay along the northwestern edge of North China. Subduction along the Kazakhstanian margin of the Turkestan Ocean resulted in collision between northern Tarim and Kazakhstania during the mid Carboniferous as the ocean closed. The South Tian Shan fold and thrust belt , which extends over 2,000 km from Uzbekistan to northwest China, is the remains of this accretionary complex and forms

6670-438: The Early Mississippian, led to the rifting of the Yukon-Tanana terrane and the opening of the Slide Mountain Ocean . Along the northern margin of Laurussia, orogenic collapse of the Late Devonian to Early Mississippian Innuitian orogeny led to the development of the Sverdrup Basin . Much of Gondwana lay in the southern polar region during the Carboniferous. As the plate moved, the South Pole drifted from southern Africa in

6815-461: The Early to Middle Mississippian, carbonate production occurred to depth across the gently dipping continental slopes of Laurussia and North and South China ( carbonate ramp architecture) and evaporites formed around the coastal regions of Laurussia, Kazakhstania, and northern Gondwana. From the late Visean, the cooling climate restricted carbonate production to depths of less than c. 10 m forming carbonate shelves with flat-tops and steep sides. By

6960-478: The Houses of York and Lancaster respectively, were combined to form the Tudor Rose of England. This rivalry between the royal houses of York and Lancaster has passed into popular culture as a rivalry between the counties of Yorkshire and Lancashire , particularly in sport (for example the Roses Match played in County Cricket ), although the House of Lancaster was based in York and the House of York in London. The English Reformation began under Henry VIII and

7105-466: The Hurst mine. This industry seemed to decline until after the Norse (Danish) invasions of the area. During the major ecclesiastical building of the 12th and 13th centuries, lead became a valuable commodity and mining once again increased in the valley. Evidence of the lead mining can still be seen from the remains of the 18th-century practice of ' hushing ' that involved creating turf dams across gills that were then released to wash away topsoil to expose

7250-432: The Kasimovian covers a period of globally low sea level, which has resulted in disconformities within many sequences of this age. This has created difficulties in finding suitable marine fauna that can used to correlate boundaries worldwide. The Kasimovian currently lacks a defined GSSP; potential sites in the southern Urals, southwest USA and Nashui, Guizhou Province, southwestern China are being considered. The Gzhelian

7395-465: The Kisdon gorge. Retreat moraines lower in the river valley can be seen around Gunnerside and Grinton Bridge. The earliest evidence of occupation in the river valley can be dated to the Mesolithic and Neolithic Ages with the discovery of flint tools and arrowheads. Around Harkerside are some small stone circles that date to the Bronze Age and some Iron Age defensive earthworks. Evidence of lead mining has been traced back to Roman times with finds at

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7540-418: The Late Ordovician . As they drifted northwards the Rheic Ocean closed in front of them, and they began to collide with southeastern Laurussia in the Middle Devonian. The resulting Variscan orogeny involved a complex series of oblique collisions with associated metamorphism , igneous activity, and large-scale deformation between these terranes and Laurussia, which continued into the Carboniferous. During

7685-401: The Late Pennsylvanian, deformation along the Alleghanian orogen became northwesterly-directed compression . The Uralian orogeny is a north–south trending fold and thrust belt that forms the western edge of the Central Asian Orogenic Belt . The Uralian orogeny began in the Late Devonian and continued, with some hiatuses, into the Jurassic . From the Late Devonian to early Carboniferous,

7830-591: The Middle Ages the county was subdivided into smaller administrative areas; the city of York was a self-governing county corporate from 1396, and the rest of the county was divided into three ridings – North , East, and West . From 1660 onwards each riding had its own lord-lieutenant , and between 1889 and 1974 the ridings were administrative counties . There was a Sheriff of Yorkshire until 1974. Yorkshire gives its name to four modern ceremonial counties : East Riding of Yorkshire , North Yorkshire , South Yorkshire , and West Yorkshire , which together cover most of

7975-427: The North rebelled against the Normans in September 1069 AD, enlisting Sweyn II of Denmark . They tried to take back York, but the Normans burnt it before they could. What followed was the Harrying of the North ordered by William. From York to Durham , crops, domestic animals, and farming tools were scorched . Many villages between the towns were burnt and local northerners were indiscriminately murdered. During

8120-441: The Paleo-Tethys to the southwest and Panthalassa to the northeast. Cyclothem sediments with coal and evaporites were deposited across the passive margins that surrounded both continents. The Carboniferous climate was dominated by the Late Paleozoic Ice Age (LPIA), the most extensive and longest icehouse period of the Phanerozoic, which lasted from the Late Devonian to the Permian (365 Ma-253 Ma). Temperatures began to drop during

8265-458: The Parliamentarians ("Roundheads") fought back, re-taking Yorkshire town by town, until they won the Battle of Marston Moor and with it control of all of the North of England . In the 16th and 17th centuries Leeds and other wool-industry-centred towns continued to grow, along with Huddersfield, Hull and Sheffield, while coal mining first came into prominence in the West Riding of Yorkshire . The wool textile industry, which had previously been

8410-412: The Pennsylvanian, cyclothems were deposited in shallow, epicontinental seas across the tropical regions of Laurussia (present day western and central US, Europe, Russia and central Asia) and the North and South China cratons . The rapid sea levels fluctuations they represent correlate with the glacial cycles of the Late Paleozoic Ice Age. The advance and retreat of ice sheets across Gondwana followed

8555-402: The Pennsylvanian, together with widespread glaciation across Gondwana led to major climate and sea level changes, which restricted marine fauna to particular geographic areas thereby reducing widespread biostratigraphic correlations. Extensive volcanic events associated with the assembling of Pangea means more radiometric dating is possible relative to the Mississippian. The Bashkirian Stage

8700-426: The Period. This was not a steady rise, but included peaks and troughs reflecting the dynamic climate conditions of the time. How the atmospheric oxygen concentrations influenced the large body size of arthropods and other fauna and flora during the Carboniferous is also a subject of ongoing debate. The changing climate was reflected in regional-scale changes in sedimentation patterns. In the relatively warm waters of

8845-430: The Permian. The Kazakhstanian microcontinent is composed of a series of Devonian and older accretionary complexes. It was strongly deformed during the Carboniferous as its western margin collided with Laurussia during the Uralian orogen and its northeastern margin collided with Siberia. Continuing strike-slip motion between Laurussia and Siberia led the formerly elongate microcontinent to bend into an orocline . During

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8990-455: The Romans enabled her to keep control of the kingdom; however, her former husband staged rebellions against her and her Roman allies. At the second attempt, Venutius seized the kingdom, but the Romans, under general Petillius Cerialis , conquered the Brigantes in 71 AD. The fortified city of Eboracum (now York) was named as capital of Britannia Inferior and joint capital of all Roman Britain . The emperor Septimius Severus ruled

9135-414: The Swale as England's River Jordan . Mass baptisms are still carried out in the river around the Catterick Bridge area. Over the centuries, lead mining and cattle farming have been the main industries, but competition from the rest of the world saw them decline by the end of the 19th century. Some crop farming also took place, most notably during the warm periods of the 13th century. Tourism now plays

9280-469: The United Kingdom's best beach, with a "postcard-perfect harbour". There are eight officially designated cities in Yorkshire: Bradford, Doncaster, Kingston upon Hull, Leeds, Ripon , Sheffield, Wakefield, and York. City status is formally held by the administrative territory rather than the urban area. Carboniferous The name Carboniferous means " coal -bearing", from the Latin carbō (" coal ") and ferō ("bear, carry"), and refers to

9425-432: The Urals and Nashui, Guizhou Province, southwestern China are being considered. The Kasimovian is the first stage in the Upper Pennsylvanian. It is named after the Russian city of Kasimov , and was originally included as part of Nikitin's 1890 definition of the Moscovian. It was first recognised as a distinct unit by A.P. Ivanov in 1926, who named it the " Tiguliferina " Horizon after a type of brachiopod . The boundary of

9570-431: The Urals and Nashui, Guizhou Province, southwestern China for the GSSP are being considered. The GSSP for the base of the Permian is located in the Aidaralash River valley near Aqtöbe , Kazakhstan and was ratified in 1996. The beginning of the stage is defined by the first appearance of the conodont Streptognathodus postfusus . A cyclothem is a succession of non-marine and marine sedimentary rocks , deposited during

9715-414: The Visean of c. 15.3%, although with large uncertainties; and, pyrite records suggest levels of c. 15% early in the Carboniferous, to over 25% during the Pennsylvanian, before dropping back below 20% towards the end. However, whilst exact numbers vary, all models show an overall increase in atmospheric oxygen levels from a low of between 15-20% at the beginning of the Carboniferous to highs of 25-30% during

9860-564: The Western Empire was in intermittent decline. After the Romans left, small Celtic kingdoms arose in the region, including the kingdoms of Deira to the east (domain of settlements near Malton on Derwent ), Ebrauc (domain of York) around the north and Elmet to the west. The latter two were successors of land south-west and north-east of the former Brigantia capital. Angles (hailing from southern Denmark and northern Germany, probably along with Swedish Geats ) consolidated (merging Ebrauc ) under Deira, with York as capital. This in turn

10005-406: The Zharma-Saur arc formed along the northeastern margin of Kazakhstania. By the late Carboniferous, all these complexes had accreted to the Siberian craton as shown by the intrusion of post-orogenic granites across the region. As Kazakhstania had already accreted to Laurussia, Siberia was effectively part of Pangea by 310 Ma, although major strike-slip movements continued between it and Laurussia into

10150-476: The area that would become the East Riding, might have been related to the Parisii of Lutetia Parisiorum , Gaul (known today as Paris, France). Their capital was at Petuaria , close to the Humber Estuary. Although the Roman conquest of Britain began in 43 AD, the Brigantes remained in control of their kingdom as a client state of Rome for an extended period, reigned over by the Brigantian monarchs Cartimandua and her husband Venutius . The capital

10295-414: The area was invaded and conquered for short periods by England between 927 and 954 before eventually being annexed into England in 954. It was closely associated with the much longer-lived Kingdom of Dublin throughout this period. An army of Danish Vikings , the Great Heathen Army as its enemies often referred to it, invaded Northumbrian territory in 866 AD. The Danes conquered and assumed what

10440-789: The area was split between North Yorkshire, South Yorkshire and West Yorkshire, which all kept the Yorkshire name. A large part of the east of the county went to the new county of Humberside , and an area in the north-east went to the new county of Cleveland . Some more rural areas at the edges of the historic county were transferred to County Durham, Cumbria , Lancashire and Greater Manchester , whilst South Yorkshire also included areas which had been in Nottinghamshire. Cleveland and Humberside were both abolished in 1996, since when there have been four ceremonial counties with Yorkshire in their names: East Riding of Yorkshire, North Yorkshire, South Yorkshire and West Yorkshire, which together cover most of

10585-647: The average temperature in the tropics c. 24 °C (75 °F) and in polar regions c. -23 °C (-10 °F), whilst during the Early Tournaisian Warm Interval (358-353 Ma) the GAT was c. 22 °C (72 °F), the tropics c. 30 °C (86 °F) and polar regions c. 1.5 °C (35 °F). Overall, for the Ice Age the GAT was c. 17 °C (62 °F), with tropical temperatures c. 26 °C and polar temperatures c. -9.0 °C (16 °F). There are

10730-516: The base of the Carboniferous System, Mississippian Subsystem and Tournaisian Stage is located at the La Serre section in Montagne Noire , southern France. It is defined by the first appearance of the conodont Siphonodella sulcata within the evolutionary lineage from Siphonodella praesulcata to Siphonodella sulcata . This was ratified by the ICS in 1990. However, in 2006 further study revealed

10875-482: The beginning of the Period to highs of 25-30%. The development of a Carboniferous chronostratigraphic timescale began in the late 18th century. The term "Carboniferous" was first used as an adjective by Irish geologist Richard Kirwan in 1799 and later used in a heading entitled "Coal-measures or Carboniferous Strata" by John Farey Sr. in 1811. Four units were originally ascribed to the Carboniferous, in ascending order,

11020-426: The booming industry, living conditions declined in the industrial towns due to overcrowding. This saw bouts of cholera in both 1832 and 1848. However, advances were made by the end of the century with the introduction of modern sewers and water supplies . Several Yorkshire railway networks were introduced as railways spread across the country to reach remote areas. Canals and turnpike roads were introduced in

11165-431: The boundaries with County Durham, Lancashire and Lincolnshire. After 1889 there were occasional adjustments to accommodate urban areas which were developing across county boundaries, such as in 1934 when Dore and Totley were transferred from Derbyshire to Yorkshire on being absorbed into the borough of Sheffield. More significant changes in 1974 saw the historic county divided between several counties. The majority of

11310-410: The charcoal record and pyrite). Results from these different methods for the Carboniferous vary. For example: the increasing occurrence of charcoal produced by wildfires from the Late Devonian into the Carboniferous indicates increasing oxygen levels, with calculations showing oxygen levels above 21% for most of the Carboniferous; halite gas inclusions from sediments dated 337-335 Ma give estimates for

11455-611: The city of Visé , Liège Province , Belgium. In 1967, the base of the Visean was officially defined as the first black limestone in the Leffe facies at the Bastion Section in the Dinant Basin . These changes are now thought to be ecologically driven rather than caused by evolutionary change, and so this has not been used as the location for the GSSP. Instead, the GSSP for the base of the Visean

11600-521: The complexity of the geology. The ICS subdivisions from youngest to oldest are as follows: The Mississippian was proposed by Alexander Winchell in 1870 named after the extensive exposure of lower Carboniferous limestone in the upper Mississippi River valley. During the Mississippian, there was a marine connection between the Paleo-Tethys and Panthalassa through the Rheic Ocean resulting in

11745-555: The conquest, only Bridlington , Pocklington , and York continued at a prominent level. In the early 12th century, people of Yorkshire had to contend with the Battle of the Standard at Northallerton with the Scots . Representing the Kingdom of England led by Archbishop Thurstan of York , soldiers from Yorkshire defeated the more numerous Scots. The population of Yorkshire boomed until it

11890-437: The continental shelves. Major river channels, up to several kilometres wide, stretched across these shelves feeding a network of smaller channels, lakes and peat mires. These wetlands were then buried by sediment as sea levels rose during interglacials . Continued crustal subsidence of the foreland basins and continental margins allowed this accumulation and burial of peat deposits to continue over millions of years resulting in

12035-458: The county are more sparsely populated, however the north-east includes the southern part of the Teesside conurbation, and the port city of Kingston upon Hull is located in the south-east. York is located near the centre of the county. Yorkshire has a coastline to the North Sea to the east. The North York Moors occupy the north-east of the county, and the centre contains the Vale of Mowbray in

12180-538: The county councils. During the Second World War , Yorkshire became an important base for RAF Bomber Command and brought the county and its productive industries into the cutting edge of the war, and thus in the targets of Luftwaffe bombers during the Battle of Britain . From the late 20th century onwards there have been a number of significant reforms of the local government structures covering Yorkshire, notably in 1968, 1974, 1986, 1996 and 2023, discussed in

12325-510: The development of a common European timescale with the Carboniferous System divided into the lower Dinantian , dominated by carbonate deposition and the upper Silesian with mainly siliciclastic deposition. The Dinantian was divided into the Tournaisian and Viséan stages. The Silesian was divided into the Namurian , Westphalian and Stephanian stages. The Tournaisian is the same length as

12470-526: The early Carboniferous Kanimblan Orogeny . Continental arc magmatism continued into the late Carboniferous and extended round to connect with the developing proto-Andean subduction zone along the western South American margin of Gondwana. Shallow seas covered much of the Siberian craton in the early Carboniferous. These retreated as sea levels fell in the Pennsylvanian and as the continent drifted north into more temperate zones extensive coal deposits formed in

12615-580: The early Carboniferous in North China. However, bauxite deposits immediately above the regional mid Carboniferous unconformity indicate warm tropical conditions and are overlain by cyclothems including extensive coals. South China and Annamia (Southeast Asia) rifted from Gondwana during the Devonian. During the Carboniferous, they were separated from each other and North China by the Paleoasian Ocean with

12760-618: The early Carboniferous to eastern Antarctica by the end of the period. Glacial deposits are widespread across Gondwana and indicate multiple ice centres and long-distance movement of ice. The northern to northeastern margin of Gondwana (northeast Africa, Arabia, India and northeastern West Australia) was a passive margin along the southern edge of the Paleo-Tethys with cyclothem deposition including, during more temperate intervals, coal swamps in Western Australia. The Mexican terranes along

12905-605: The edge of the Yorkshire Dales National Park and flows along Nidderdale before reaching the Vale of York and the Ouse. The River Wharfe , which drains Wharfedale , joins the Ouse upstream of Cawood . The Rivers Aire and Calder are more southerly contributors to the River Ouse and the most southerly Yorkshire tributary is the River Don , which flows northwards to join the main river at Goole . Further north and east

13050-523: The end of the Carboniferous, extension and rifting across the northern margin of Gondwana led to the breaking away of the Cimmerian Terrane during the early Permian and the opening of the Neo-Tethys Ocean . Along the southeastern and southern margin of Gondwana (eastern Australia and Antarctica), northward subduction of Panthalassa continued. Changes in the relative motion of the plates resulted in

13195-451: The end of the Devonian, even if the specific enzymes used by basidiomycetes had not. The second theory is that the geographical setting and climate of the Carboniferous were unique in Earth's history: the co-occurrence of the position of the continents across the humid equatorial zone, high biological productivity, and the low-lying, water-logged and slowly subsiding sedimentary basins that allowed

13340-499: The existence of many Celtic placenames in Yorkshire today, such as Kingston upon Hull and Pen-y-ghent . As well as the Angles and Geats, other settlers included Frisians (thought to have founded Fryston and Frizinghall ), Danes , Franks and Huns . At its greatest extent, Northumbria stretched from the Irish Sea to the North Sea and from Edinburgh down to Hallamshire in

13485-471: The families and subsequent descendants of Danish Vikings, the leadership of the kingdom nonetheless passed into Norwegian hands during its twilight years. Eric Bloodaxe , an ex-king of Norway who was the last independent Viking king of Jórvík, is a particularly noted figure in history, and his bloodthirsty approach towards leadership may have been at least partly responsible for convincing the Danish inhabitants of

13630-475: The formation of thick and widespread coal formations. During the warm interglacials, smaller coal swamps with plants adapted to the temperate conditions formed on the Siberian craton and the western Australian region of Gondwana. There is ongoing debate as to why this peak in the formation of Earth's coal deposits occurred during the Carboniferous. The first theory, known as the delayed fungal evolution hypothesis,

13775-540: The gates of the city on the king when he came to enter a few months before fighting began, while the North Riding of Yorkshire in particular was strongly royalist . York was the base for Royalists, and from there they captured Leeds and Wakefield only to have them recaptured a few months later. The royalists won the Battle of Adwalton Moor meaning they controlled Yorkshire (with the exception of Hull). From their base in Hull

13920-670: The headwaters and 1300 mm p.a. in the lower waters over a drop of 148 m in 32 km. The source of the Swale is at the confluence of Birkdale Beck and Great Sleddale Beck. The river flows north-north-east past lead mines on its northern bank and the end of Whitsundale and then eastwards towards the first of many waterfalls in the headwaters. After flowing over Wain Wath Force the river continues south-east over Hoggarts Leap and Catrake Force near Keld , before it reaches East Gill Force and Kisdon Force . Shortly after Swinner Gill joins

14065-612: The historic county. Yorkshire Day is observed annually on 1 August and is a celebration of the general culture of Yorkshire , including its history and dialect . Its name is used by several institutions, for example the Royal Yorkshire Regiment of the British Army, in sport, and in the media. The emblem of Yorkshire is a white rose , which was originally the heraldic badge of the British royal House of York . The county

14210-560: The historic county. There is a region called Yorkshire and the Humber which covers a similar area to the combined area of the four Yorkshire ceremonial counties, the exceptions being that the region excludes the parts of North Yorkshire which had been in Cleveland, but includes North East Lincolnshire and North Lincolnshire (which had been in Humberside). Until 2009 some government powers in

14355-541: The late 18th century. In the following century the spa towns of Harrogate and Scarborough flourished, due to people believing mineral water had curative properties. When elected county councils were established in 1889, rather than have a single Yorkshire County Council, each of the three ridings was made an administrative county with its own county council, and the eight larger towns and cities of Bradford, Halifax, Huddersfield, Hull, Leeds, Middlesbrough, Sheffield and York were made county boroughs , independent from

14500-456: The late Carboniferous. Land arthropods such as arachnids (e.g. trigonotarbids and Pulmonoscorpius ), myriapods (e.g. Arthropleura ) and especially insects (particularly flying insects ) also underwent a major evolutionary radiation during the late Carboniferous. Vast swaths of forests and swamps covered the land, which eventually became the coal beds characteristic of the Carboniferous stratigraphy evident today. The later half of

14645-496: The late Devonian with a short-lived glaciation in the late Famennian through Devonian–Carboniferous boundary, before the Early Tournaisian Warm Interval. Following this, a reduction in atmospheric CO 2 levels, caused by the increased burial of organic matter and widespread ocean anoxia led to climate cooling and glaciation across the south polar region. During the Visean Warm Interval glaciers nearly vanished retreating to

14790-449: The latter of which is known as the bloodiest battle ever fought on English soil. Richard III was the last Yorkist king. Henry Tudor , sympathiser to the House of Lancaster, defeated and killed Richard at the Battle of Bosworth Field . He then became King Henry VII and married Elizabeth of York , daughter of Yorkist Edward IV , ending the wars. The two roses of white and red, emblems of

14935-526: The latter three are still in common use in Western Europe. Stages can be defined globally or regionally. For global stratigraphic correlation, the ICS ratify global stages based on a Global Boundary Stratotype Section and Point (GSSP) from a single formation (a stratotype ) identifying the lower boundary of the stage. Only the boundaries of the Carboniferous System and three of the stage bases are defined by global stratotype sections and points because of

15080-616: The main town of the valley, Richmond . It starts a series of long south-east meanders past Brompton-on-Swale and passes under the A1 at Catterick Bridge before turning south past Catterick . The river continues long south and south-east meanders past Thrintoft and Morton-on-Swale . As it starts to pursue a more constant southerly flow it is joined by the River Wiske before passing Skipton-on-Swale , Catton , Topcliffe and Asenby . It then flows past Helperby and Myton-on-Swale before joining

15225-432: The majority of a cyclothem sequence occurred during falling sea levels, when rates of erosion were high, meaning they were often periods of non-deposition. Erosion during sea level falls could also result in the full or partial removal of previous cyclothem sequences. Individual cyclothems are generally less than 10 m thick because the speed at which sea level rose gave only limited time for sediments to accumulate. During

15370-490: The many coal beds formed globally during that time. The first of the modern "system" names, it was coined by geologists William Conybeare and William Phillips in 1822, based on a study of the British rock succession. Carboniferous is the period during which both terrestrial animal and land plant life was well established. Stegocephalia (four-limbed vertebrates including true tetrapods ), whose forerunners ( tetrapodomorphs ) had evolved from lobe-finned fish during

15515-710: The mid Carboniferous, the South American sector of Gondwana collided obliquely with Laurussia's southern margin resulting in the Ouachita orogeny. The major strike-slip faulting that occurred between Laurussia and Gondwana extended eastwards into the Appalachian Mountains where early deformation in the Alleghanian orogeny was predominantly strike-slip. As the West African sector of Gondwana collided with Laurussia during

15660-705: The mid-9th century the area had been invaded by Norsemen who settled first the lower and then the upper valley. After the Norman invasion, the lands of the valley were given to Alan the Red of Brittany who built the castle at Richmond between 1071 and 1091. It was built on a bluff overlooking the River Swale. In the 7th century, St Paulinus supposedly immersed thousands of people in a baptismal rite at Brompton-on-Swale and further downstream at Brafferton . Because so many had been baptised in this way, 19th-century writers have labelled

15805-451: The near worldwide distribution of marine faunas and so allowing widespread correlations using marine biostratigraphy . However, there are few Mississippian volcanic rocks , and so obtaining radiometric dates is difficult. The Tournaisian Stage is named after the Belgian city of Tournai . It was introduced in scientific literature by Belgian geologist André Dumont in 1832. The GSSP for

15950-477: The north and the Vale of York in the south. The west contains part of the Pennines , which form the Yorkshire Dales in the north-west. The county was historically bordered by County Durham to the north, the North Sea to the east, Lincolnshire, Nottinghamshire , Derbyshire , and Cheshire to the south, and Lancashire and Westmorland to the west. It was the largest by area in the United Kingdom . From

16095-579: The northern boundary of Yorkshire was the River Tees , the eastern boundary was the North Sea coast and the southern boundary was the Humber Estuary and Rivers Don and Sheaf . The western boundary meandered along the western slopes of the Pennine Hills to again meet the River Tees. In Yorkshire there is a very close relationship between the major topographical areas and the geological period in which they were formed. The Pennine chain of hills in

16240-670: The northern foot of the North York Moors to reach the sea at Whitby . To the east of the Yorkshire Wolds the River Hull flows southwards to join the Humber Estuary at Kingston upon Hull . The western Pennines are drained by the River Ribble which flows westwards, eventually reaching the Irish Sea close to Lytham St Annes . The countryside of Yorkshire has been called " God's Own County " by its inhabitants. Yorkshire includes

16385-505: The northwestern Gondwana margin, were affected by the subduction of the Rheic Ocean. However, they lay to west of the Ouachita orogeny and were not impacted by continental collision but became part of the active margin of the Pacific. The Moroccan margin was affected by periods of widespread dextral strike-slip deformation, magmatism and metamorphism associated with the Variscan orogeny. Towards

16530-540: The ore veins. It was part of the Votadini Celtic kingdom of Catraeth, but in the late 6th century the river valley was invaded by Angles who took the settlement at Catraeth (now Catterick ). Warriors from the Celtic Gododdin kingdom to the north attempted to dislodge them, but failed to do so at the Battle of Catraeth . The Angles then established themselves at Reeth, Stainton, Grinton Bridge and Fremington. By

16675-426: The peat mires. As fully marine conditions were established, limestones succeeded these marginal marine deposits. The limestones were in turn overlain by deep water black shales as maximum sea levels were reached. Ideally, this sequence would be reversed as sea levels began to fall again; however, sea level falls tend to be protracted, whilst sea level rises are rapid, ice sheets grow slowly but melt quickly. Therefore,

16820-509: The period experienced glaciations , low sea level, and mountain building as the continents collided to form Pangaea . A minor marine and terrestrial extinction event, the Carboniferous rainforest collapse , occurred at the end of the period, caused by climate change. Atmospheric oxygen levels, originally thought to be consistently higher than today throughout the Carboniferous, have been shown to be more variable, increasing from low levels at

16965-488: The preceding Devonian period, became pentadactylous during the Carboniferous. The period is sometimes called the Age of Amphibians because of the diversification of early amphibians such as the temnospondyls , which became dominant land vertebrates, as well as the first appearance of amniotes including synapsids (the clade to which modern mammals belong) and sauropsids (which include modern reptiles and birds) during

17110-459: The presence of Siphonodella sulcata below the boundary, and the presence of Siphonodella praesulcata and Siphonodella sulcata together above a local unconformity . This means the evolution of one species to the other, the definition of the boundary, is not seen at the La Serre site making precise correlation difficult. The Viséan Stage was introduced by André Dumont in 1832 and is named after

17255-877: The proto-Andes in Bolivia and western Argentina and the Pan-African mountain ranges in southeastern Brazil and southwest Africa. The main phase of the LPIA (c. 335-290 Ma) began in the late Visean, as the climate cooled and atmospheric CO 2 levels dropped. Its onset was accompanied by a global fall in sea level and widespread multimillion-year unconformities. This main phase consisted of a series of discrete several million-year-long glacial periods during which ice expanded out from up to 30 ice centres that stretched across mid- to high latitudes of Gondwana in eastern Australia, northwestern Argentina, southern Brazil, and central and Southern Africa. Isotope records indicate this drop in CO 2 levels

17400-524: The region to accept English sovereignty so readily in the years that followed. After around 100 years of its volatile existence, the Kingdom of Jorvik finally came to an end. The Kingdom of Wessex was now in its ascendancy and established its dominance over the North in general, placing Yorkshire again within Northumbria , which retained a certain amount of autonomy as an almost-independent earldom rather than

17545-475: The region were devolved to the Yorkshire and Humber Assembly ; since 2009 the region has been used primarily for presentation of statistics. Yorkshire is so named as it is the shire (administrative area or county) of the city of York , or York's Shire. The word "York" has an interesting etymology, first it is believed to have originated from the Celtic word "Eburakon", which means "Place of yew trees ". This theory

17690-602: The river banks. The many hay meadows are filled with buttercup species and wood cranesbill . There are three distinct geological areas in Upper and Mid Swaledale. The upper reaches of the river flow over Carboniferous , Permian and Triassic rock, all of which are atop a layer of Lower Paleozoic beds. These rocks are rich in minerals and metalliferous sulfide ores such as galena , sphalerite , chalcopyrite and bravoite . There are also deposits of fluorite , barite , witherite , calcite , dolomite and barytocalcite . Along

17835-468: The river it swings sharply south towards the village of Muker where Straw Beck joins and the river turns east again. The river flows past Gunnerside towards Feetham where it turns north-east for a short while before returning east past Healaugh , Reeth and Grinton . The river then swings gently south-east and east below Marrick before turning north-eastward and then north past Marske . The Swale returns eastward near Hudswell before it flows past

17980-503: The rivers in the Ouse system is the River Swale , which drains Swaledale before passing through Richmond and meandering across the Vale of Mowbray . Next, draining Wensleydale , is the River Ure , which the Swale joins east of Boroughbridge . Near Great Ouseburn the Ure is joined by the small Ouse Gill Beck, and below the confluence the river is known as the Ouse. The River Nidd rises on

18125-622: The sea. Cyclothem lithologies vary from mudrock and carbonate-dominated to coarse siliciclastic sediment-dominated sequences depending on the paleo-topography, climate and supply of sediments to the shelf. The main period of cyclothem deposition occurred during the Late Paleozoic Ice Age from the Late Mississippian to early Permian, when the waxing and waning of ice sheets led to rapid changes in eustatic sea level . The growth of ice sheets led global sea levels to fall as water

18270-442: The south. Scandinavian York (also referred to as Jórvík ) or Danish/Norwegian York is a term used by historians for the south of Northumbria (modern-day Yorkshire) during the late 9th century and first half of the 10th century, when it was dominated by Norse warrior-kings; in particular, used to refer to York , the city controlled by these kings. Norse monarchy controlled varying amounts of Northumbria from 875 to 954, however

18415-497: The suture between Kazakhstania and Tarim. A continental magmatic arc above a south-dipping subduction zone lay along the northern North China margin, consuming the Paleoasian Ocean. Northward subduction of the Paleo-Tethys beneath the southern margins of North China and Tarim continued during the Carboniferous, with the South Qinling block accreted to North China during the mid to late Carboniferous. No sediments are preserved from

18560-410: The thick accumulation of peat were sufficient to account for the peak in coal formation. During the Carboniferous, there was an increased rate in tectonic plate movements as the supercontinent Pangea assembled. The continents themselves formed a near circle around the opening Paleo-Tethys Ocean, with the massive Panthalassic Ocean beyond. Gondwana covered the south polar region. To its northwest

18705-755: The underlying geology and producing distinctive layered hills. The county top is the remote Mickle Fell (height 788 metres (2,585 ft) above sea level) in the North Pennines southwest of Teesdale, which is also the highest point in the North Riding. The highest point in the West Riding is Whernside (height 736 metres (2,415 ft)) near to Ingleton in the Yorkshire Dales. Together with nearby Ingleborough (height 723 metres (2,372 ft)) and Pen-y-Ghent (height 694 metres (2,277 ft)), Whernside forms

18850-544: The uplift and erosion of the more mafic basement rocks of the Central Pangea Mountains at this time, CO 2 levels dropped as low as 175 ppm and remained under 400 ppm for 10 Ma. Temperatures across the Carboniferous reflect the phases of the LPIA. At the extremes, during the Permo-Carboniferous Glacial Maximum (299-293 Ma) the global average temperature (GAT) was c. 13 °C (55 °F),

18995-402: The valley sides can be seen the typical Dales geology of Yoredale beds, alternating strata of limestone and gritstone . Small seams of coal , particularly around Tan Hill, have been found and worked. During the last Ice Age, the glacier that dominated the valley was responsible for broadening it and altering the course of the river around Keld and Round Howe. It was also responsible for cutting

19140-484: The west is of Carboniferous origin. The central vale is Permo-Triassic . The North York Moors in the north-east of the county are Jurassic in age while the Yorkshire Wolds to the south east are Cretaceous chalk uplands. Yorkshire is drained by several rivers. In western and central Yorkshire the many rivers flow into the River Ouse which reaches the North Sea via the Humber Estuary . The most northerly of

19285-460: The west. The highest point of the North York Moors is Urra Moor (height 454 metres (1,490 ft)). The highest point of the Yorkshire Wolds , a range of low chalk downlands east of York, is Bishop Wilton Wold (height 246 metres (807 ft)), which is also the highest point of the East Riding. The view from Sutton Bank at the southeastern edge of the North York Moors near Thirsk encompasses

19430-468: The winter that followed, families starved to death and thousands of peasants died of cold and hunger. Orderic Vitalis estimated that "more than 100,000" people from the North died from hunger. In the centuries following, many abbeys and priories were built in Yorkshire. Norman landowners increased their revenues and established new towns such as Barnsley , Doncaster , Hull , Leeds , Scarborough and Sheffield , among others. Of towns founded before

19575-465: The yew tree ( Taxus Baccata ). Yew trees were highly valued in ancient times for their durable wood, which was used for making bows, spears, and other tools. Over time, the word evolved into "York", and it eventually came to refer to the city of York in England. Either way, it is an evolved word for the magical 'Yew' tree. Early inhabitants of what became Yorkshire were Hen Ogledd Brythonic Celts (old north British Celts), who formed separate tribes,

19720-487: Was Laurussia. These two continents slowly collided to form the core of Pangea. To the north of Laurussia lay Siberia and Amuria . To the east of Siberia, Kazakhstania , North China and South China formed the northern margin of the Paleo-Tethys, with Annamia laying to the south. The Central Pangean Mountains were formed during the Variscan - Alleghanian - Ouachita orogeny. Today their remains stretch over 10,000 km from

19865-560: Was between the north and west ridings Isurium Brigantum (near Aldborough ) civitas under Roman rule. Initially, this situation suited both the Romans and the Brigantes, who were known as the most militant tribe in Britain. Queen Cartimandua left Venutius for his armour bearer, Vellocatus , setting off a chain of events that changed control of the region. Cartimandua's good relationship with

20010-554: Was complete by the Tournaisian, but subduction of the Ural Ocean between Kazakhstania and Laurussia continued until the Bashkirian when the ocean finally closed and continental collision began. Significant strike-slip movement along this zone indicates the collision was oblique. Deformation continued into the Permian and during the late Carboniferous and Permian the region was extensively intruded by granites . The Laurussian continent

20155-447: Was formed by the collision between Laurentia , Baltica and Avalonia during the Devonian. At the beginning of the Carboniferous, some models show it at the equator, whilst others place it further south. In either case, the continent drifted northwards, reaching low latitudes in the northern hemisphere by the end of the Period. The Central Pangean Mountain drew in moist air from the Paleo-Tethys Ocean resulting in heavy precipitation and

20300-445: Was grouped with Bernicia , another former Celtic - Brigantes kingdom that was north of the River Tees and had come to be headed by Bamburgh , to form Northumbria . Elmet had remained independent from the Germanic Angles until some time in the early 7th century, when King Edwin of Northumbria expelled its last king, Certic, and annexed the region to his Deira region. The Celts never went away, but were assimilated. This explains

20445-466: Was hit by the Great Famine of 1315. It did not help that after the English defeat in the Battle of Bannockburn in 1314, the Scottish army rampaged throughout northern England, and Yorkshire was no exception. During The Great Raid of 1322 , they raided and pillaged from the suburbs of York, even as far as East Riding and the Humber. Some like Richmond had to bribe the Scots to spare the town. The Black Death then reached Yorkshire by 1349, killing around

20590-432: Was in the Kingdom of Jórvík that the only truly Viking territory on mainland Britain was ever established. The Kingdom prospered, taking advantage of the vast trading network of the Viking nations , and established commercial ties with the British Isles , North-West Europe, the Mediterranean and the Middle East. Founded by the Dane Halfdan Ragnarsson in 875, ruled for the great part by Danish kings, and populated by

20735-646: Was lock away in glaciers. Falling sea levels exposed large tracts of the continental shelves across which river systems eroded channels and valleys and vegetation broke down the surface to form soils . The non-marine sediments deposited on this erosional surface form the base of the cyclothem. As sea levels began to rise, the rivers flowed through increasingly water-logged landscapes of swamps and lakes. Peat mires developed in these wet and oxygen-poor conditions, leading to coal formation. With continuing sea level rise, coastlines migrated landward and deltas , lagoons and esturaries developed; their sediments deposited over

20880-450: Was proposed by Russian stratigrapher Sofia Semikhatova in 1934. It was named after Bashkiria , the then Russian name of the republic of Bashkortostan in the southern Ural Mountains of Russia. The GSSP for the base of the Pennsylvanian Subsystem and Bashkirian Stage is located at Arrow Canyon in Nevada , US and was ratified in 1996. It is defined by the first appearance of the conodont Declinognathodus noduliferus . Arrow Canyon lay in

21025-407: Was triggered by tectonic factors with increased weathering of the growing Central Pangean Mountains and the influence of the mountains on precipitation and surface water flow. Closure of the oceanic gateway between the Rheic and Tethys oceans in the early Bashkirian also contributed to climate cooling by changing ocean circulation and heat flow patterns. Warmer periods with reduced ice volume within

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