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112-606: Tintwistle Rural District was a local government district in north east Cheshire , England from 1894 to 1974. It was created a rural district by the Local Government Act 1894 from the part of the Ashton-under-Lyne rural sanitary district which was in Cheshire. It consisted of the civil parishes of: Hattersley and Matley formed an exclave of the district. They were abolished in 1936 and their area transferred to

224-612: A bolide impact, for which an impact crater containing Manicouagan Reservoir in Quebec , Canada , has been singled out. However, the Manicouagan impact melt has been dated to 214±1 Mya. The date of the Triassic-Jurassic boundary has also been more accurately fixed recently, at 201.4 Mya. Both dates are gaining accuracy by using more accurate forms of radiometric dating, in particular the decay of uranium to lead in zircons formed at time of

336-607: A cosmopolitan distribution . Coelacanths show their highest post- Devonian diversity in the Early Triassic . Ray-finned fishes (actinopterygians) went through a remarkable diversification in the beginning of the Triassic, leading to peak diversity during the Middle Triassic; however, the pattern of this diversification is still not well understood due to a taphonomic megabias . The first stem-group teleosts appeared during

448-548: A chain of mountain ranges stretching from Turkey to Malaysia . Pangaea was fractured by widespread faulting and rift basins during the Triassic—especially late in that period—but had not yet separated. The first nonmarine sediments in the rift that marks the initial break-up of Pangaea, which separated eastern North America from Morocco , are of Late Triassic age; in the United States , these thick sediments comprise

560-466: A few exposures in the west. During the Triassic peneplains are thought to have formed in what is now Norway and southern Sweden. Remnants of this peneplain can be traced as a tilted summit accordance in the Swedish West Coast . In northern Norway Triassic peneplains may have been buried in sediments to be then re-exposed as coastal plains called strandflats . Dating of illite clay from

672-471: A long beak-like snout), and Shringasaurus (a horned herbivore which reached a body length of 3–4 metres (9.8–13.1 ft)). One group of archosauromorphs, the archosauriforms , were distinguished by their active predatory lifestyle, with serrated teeth and upright limb postures. Archosauriforms were diverse in the Triassic, including various terrestrial and semiaquatic predators of all shapes and sizes. The large-headed and robust erythrosuchids were among

784-610: A pseudosuchian. Pseudosuchians were far more ecologically dominant in the Triassic, including large herbivores (such as aetosaurs ), large carnivores (" rauisuchians "), and the first crocodylomorphs (" sphenosuchians "). Aetosaurs were heavily-armored reptiles that were common during the last 30 million years of the Late Triassic until they died out at the Triassic-Jurassic extinction. Most aetosaurs were herbivorous and fed on low-growing plants, but some may have eaten meat. " rauisuchians " (formally known as paracrocodylomorphs ) were

896-458: A short period of time, becoming extinct about 220 million years ago. They were exceptionally abundant in the middle of the Triassic, as the primary large herbivores in many Carnian-age ecosystems. They sheared plants with premaxillary beaks and plates along the upper jaw with multiple rows of teeth. Allokotosaurs were iguana-like reptiles, including Trilophosaurus (a common Late Triassic reptile with three-crowned teeth), Teraterpeton (which had

1008-562: A specialized subgroup of cynodonts, appeared during the Triassic and would survive the extinction event, allowing them to radiate during the Jurassic. Amphibians were primarily represented by the temnospondyls , giant aquatic predators that had survived the end-Permian extinction and saw a new burst of diversification in the Triassic, before going extinct by the end; however, early crown-group lissamphibians (including stem-group frogs , salamanders and caecilians ) also became more common during

1120-449: A strandflat of Bømlo , southern Norway, have shown that landscape there became weathered in Late Triassic times ( c. 210 million years ago) with the landscape likely also being shaped during that time. Eustatic sea level in the Triassic was consistently low compared to the other geological periods. The beginning of the Triassic was around present sea level, rising to about 10–20 metres (33–66 ft) above present-day sea level during

1232-570: A supercontinent has less shoreline compared to a series of smaller continents, Triassic marine deposits are relatively uncommon on a global scale. A major exception is in Western Europe , where the Triassic was first studied. The northeastern margin of Gondwana was a stable passive margin along the Neo-Tethys Ocean, and marine sediments have been preserved in parts of northern India and Arabia . In North America , marine deposits are limited to

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1344-459: Is a stub . You can help Misplaced Pages by expanding it . Cheshire Cheshire ( / ˈ tʃ ɛ ʃ ər , - ɪər / CHESH -ər, -⁠eer ) is a ceremonial county in North West England . It is bordered by Merseyside to the north-west, Greater Manchester to the north-east, Derbyshire to the east, Staffordshire to the south-east, and Shropshire to the south; to the west it

1456-563: Is a history of interaction between Cheshire and North Wales. The Domesday Book records Cheshire as having two complete Hundreds (Atiscross and Exestan) that later became the principal part of Flintshire . Additionally, another large portion of the Duddestan Hundred later became known as English Maelor (Maelor Saesneg) when it was transferred to North Wales. For this and other reasons, the Welsh language name for Cheshire, Swydd Gaerlleon ,

1568-460: Is a recent study of North American faunas. In the Petrified Forest of northeast Arizona there is a unique sequence of late Carnian-early Norian terrestrial sediments. An analysis in 2002 found no significant change in the paleoenvironment. Phytosaurs , the most common fossils there, experienced a change-over only at the genus level, and the number of species remained the same. Some aetosaurs ,

1680-421: Is almost entirely Triassic sandstone , outcrops of which have long been quarried, notably at Runcorn , providing the distinctive red stone for Liverpool Cathedral and Chester Cathedral . The eastern half of the county is Upper Triassic Mercia Mudstone laid down with large salt deposits which were mined for hundreds of years around Winsford . Separating this area from Lower Triassic Sherwood Sandstone to

1792-641: Is at Ellesmere Port. The oil refinery has operated since 1924 and has a capacity of 12 million tonnes per year. Crewe was once the centre of the British railway industry , and remains a major railway junction. The Crewe railway works , built in 1840, employed 20,000 people at its peak, although the workforce is now less than 1,000. Crewe is also the home of Bentley cars. Also within Cheshire are manufacturing plants for Jaguar and Vauxhall Motors in Ellesmere Port. The county also has an aircraft industry, with

1904-519: Is bordered by the Welsh counties of Flintshire and Wrexham , and has a short coastline on the Dee Estuary . Warrington is the largest settlement, and the city of Chester is the county town . The county has an area of 905 square miles (2,344 km ) and had a population of 1,095,500 at the 2021 census . After Warrington (211,227), the largest settlements are Chester and Crewe . The south and east of

2016-611: Is common. Cheshire West has a fairly large proportion of residents who work in Liverpool and Manchester, while the town of Northwich and area of Cheshire East falls more within Manchester's sphere of influence. All four local education authorities in Cheshire operate only comprehensive state school systems. When Altrincham , Sale and Bebington were moved from Cheshire to Trafford and Merseyside in 1974, they took some former Cheshire selective schools. There are two universities based in

2128-472: Is famous for the production of Cheshire cheese , salt and silk. The county has seen a number of inventions and firsts in its history. A mainly rural county, Cheshire has a high concentration of villages. Agriculture is generally based on the dairy trade, and cattle are the predominant livestock. Land use given to agriculture has fluctuated somewhat, and in 2005 totalled 1558 km over 4,609 holdings. Based on holdings by EC farm type in 2005, 8.51 km

2240-508: Is likely a paraphyletic group rather than a true clade. Tanystropheids were a family of protorosaurs which elevated their neck size to extremes, with the largest genus Tanystropheus having a neck longer than its body. The protorosaur family Sharovipterygidae used their elongated hindlimbs for gliding. Other archosauromorphs, such as rhynchosaurs and allokotosaurs , were mostly stocky-bodied herbivores with specialized jaw structures. Rhynchosaurs, barrel-gutted herbivores, thrived for only

2352-465: Is no evidence of glaciation at or near either pole; in fact, the polar regions were apparently moist and temperate , providing a climate suitable for forests and vertebrates, including reptiles. Pangaea's large size limited the moderating effect of the global ocean; its continental climate was highly seasonal, with very hot summers and cold winters. The strong contrast between the Pangea supercontinent and

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2464-624: Is part of Liverpool City Region combined authority , which also includes the five metropolitan boroughs of Merseyside . A referendum for a further local government reform connected with an elected regional assembly was planned for 2004, but was abandoned. As part of the local government restructuring in April 2009, Cheshire County Council and the Cheshire districts were abolished and replaced by two new unitary authorities, Cheshire East and Cheshire West and Chester . The existing unitary authorities of Halton and Warrington were not affected by

2576-713: Is sometimes used. After the Norman conquest of 1066 by William I , dissent and resistance continued for many years after the invasion. In 1069 local resistance in Cheshire was finally put down using draconian measures as part of the Harrying of the North . The ferocity of the campaign against the English populace was enough to end all future resistance. Examples were made of major landowners such as Earl Edwin of Mercia , their properties confiscated and redistributed amongst Norman barons. The earldom

2688-460: Is superimposed by 22 sea level drop events widespread in the geologic record, mostly of minor (less than 25-metre (82 ft)) and medium (25–75-metre (82–246 ft)) magnitudes. A lack of evidence for Triassic continental ice sheets suggest that glacial eustasy is unlikely to be the cause of these changes. The Triassic continental interior climate was generally hot and dry, so that typical deposits are red bed sandstones and evaporites . There

2800-459: Is usually divided into Early , Middle , and Late Triassic Epochs , and the corresponding rocks are referred to as Lower, Middle, or Upper Triassic. The faunal stages from the youngest to oldest are: During the Triassic, almost all the Earth's land mass was concentrated into a single supercontinent , Pangaea ( lit.   ' entire land ' ). This supercontinent was more-or-less centered on

2912-781: The BAE Systems facility at Woodford Aerodrome , part of BAE System's Military Air Solutions division. The facility designed and constructed Avro Lancaster and Avro Vulcan bombers and the Hawker-Siddeley Nimrod . On the Cheshire border with Flintshire is the Broughton aircraft factory, more recently associated with Airbus . Tourism in Cheshire from within the UK and overseas continues to perform strongly. Over 8 million nights of accommodation (both UK and overseas) and over 2.8 million visits to Cheshire were recorded during 2003. At

3024-566: The Carnian (early part of the Late Triassic), some advanced cynodonts gave rise to the first mammals . During the Triassic, archosaurs displaced therapsids as the largest and most ecologically prolific terrestrial amniotes. This "Triassic Takeover" may have contributed to the evolution of mammals by forcing the surviving therapsids and their mammaliaform successors to live as small, mainly nocturnal insectivores . Nocturnal life may have forced

3136-656: The Church of England Diocese of Chester follows most closely the pre-1974 county boundary of Cheshire, so it includes all of Wirral , Stockport , and the Cheshire panhandle that included Tintwistle Rural District council area. In terms of Roman Catholic church administration, most of Cheshire falls into the Roman Catholic Diocese of Shrewsbury . Cheshire has a diverse economy with significant sectors including agriculture, automotive, bio-technology, chemical, financial services, food and drink, ICT, and tourism. The county

3248-595: The Jurassic , when the temnospondyls had become very rare. Most of the Reptiliomorpha , stem-amniotes that gave rise to the amniotes, disappeared in the Triassic, but two water-dwelling groups survived: Embolomeri that only survived into the early part of the period, and the Chroniosuchia , which survived until the end of the Triassic. The Permian–Triassic extinction devastated terrestrial life. Biodiversity rebounded as

3360-555: The Lake Lugano region of northern Italy and southern Switzerland , was in Middle Triassic times a lagoon behind reefs with an anoxic bottom layer, so there were no scavengers and little turbulence to disturb fossilization, a situation that can be compared to the better-known Jurassic Solnhofen Limestone lagerstätte . The remains of fish and various marine reptiles (including the common pachypleurosaur Neusticosaurus , and

3472-670: The Municipal Borough of Hyde , the Municipal Borough of Dukinfield , Longdendale Urban District and the Municipal Borough of Stalybridge . In 1974 the district was abolished. At that time, much of north east Cheshire became part of Greater Manchester . Instead of becoming part of that county, or forming an exclave of Cheshire, Tintwistle became part of the High Peak district of Derbyshire . 53°28′18″N 1°58′18″W  /  53.47170°N 1.97180°W  / 53.47170; -1.97180 This Derbyshire location article

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3584-637: The Newark Supergroup . Rift basins are also common in South America, Europe, and Africa. Terrestrial environments are particularly well-represented in the South Africa, Russia, central Europe, and the southwest United States. Terrestrial Triassic biostratigraphy is mostly based on terrestrial and freshwater tetrapods, as well as conchostracans ("clam shrimps"), a type of fast-breeding crustacean which lived in lakes and hypersaline environments. Because

3696-469: The Olenekian and Anisian of Gondwana . Both kannemeyeriiform dicynodonts and gomphodont cynodonts remained important herbivores during much of the period. Therocephalians included both large predators ( Moschorhinus ) and herbivorous forms ( bauriids ) until their extinction midway through the period. Ecteniniid cynodonts played a role as large-sized, cursorial predators in the Late Triassic. During

3808-713: The surviving species repopulated empty terrain, but these were short-lived. Diverse communities with complex food-web structures took 30 million years to reestablish. Archosauromorph reptiles, which had already appeared and diversified to an extent in the Permian Period, exploded in diversity as an adaptive radiation in response to the Permian-Triassic mass extinction. By the Early Triassic, several major archosauromorph groups had appeared. Long-necked, lizard-like early archosauromorphs were known as protorosaurs , which

3920-463: The thecodonts ) disappeared, as did most of the large labyrinthodont amphibians, groups of small reptiles, and most synapsids. Some of the early, primitive dinosaurs also became extinct, but more adaptive ones survived to evolve into the Jurassic. Surviving plants that went on to dominate the Mesozoic world included modern conifers and cycadeoids. The cause of the Late Triassic extinction is uncertain. It

4032-437: The traversodont cynodonts—were much reduced in the northern half of Pangaea ( Laurasia ). These extinctions within the Triassic and at its end allowed the dinosaurs to expand into many niches that had become unoccupied. Dinosaurs became increasingly dominant, abundant and diverse, and remained that way for the next 150 million years. The true "Age of Dinosaurs" is during the following Jurassic and Cretaceous periods, rather than

4144-679: The " Matterhorn of Cheshire" thanks to its distinctive steep profile. Cheshire contains portions of two green belt areas surrounding the large conurbations of Merseyside and Greater Manchester (North Cheshire Green Belt, part of the North West Green Belt) and Stoke-on-Trent (South Cheshire Green Belt, part of the Stoke-on-Trent Green Belt), these were first drawn up from the 1950s. Contained primarily within Cheshire East and Chester West & Chester, with small portions along

4256-551: The 2011 Census. The population for 2021 is forecast to be 708,000. In 2001, the population density of Cheshire East and Cheshire West and Chester was 32 people per km , lower than the North West average of 42 people/km and the England and Wales average of 38 people/km . Ellesmere Port and Neston had a greater urban density than the rest of the county with 92 people/km . In 2001, ethnic white groups accounted for 98% (662,794) of

4368-791: The Anisian to Ladinian of the Tethysian domain, and from the Carnian and Rhaetian of a larger area that includes also the Boreal domain (e.g., Svalbard Islands), the North American continent, the South China block and Argentina . The best-studied of such episodes of humid climate, and probably the most intense and widespread, was the Carnian Pluvial Event . The Early Triassic was the hottest portion of

4480-564: The Bottlemen member Van McCann, Girls Aloud member Nicola Roberts , Stephen Hough , John Mayall , The Charlatans member Tim Burgess , and Nigel Stonier . Triassic The Triassic began in the wake of the Permian–Triassic extinction event , which left the Earth's biosphere impoverished; it was well into the middle of the Triassic before life recovered its former diversity. Three categories of organisms can be distinguished in

4592-405: The Carnian and include early sauropodomorphs and theropods. Most Triassic dinosaurs were small predators and only a few were common, such as Coelophysis , which was 1 to 2 metres (3.3 to 6.6 ft) long. Triassic sauropodomorphs primarily inhabited cooler regions of the world. The large predator Smok was most likely also an archosaur, but it is uncertain if it was a primitive dinosaur or

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4704-552: The Early Triassic, forming small patches of reefs of modest extent compared to the great reef systems of Devonian or modern times. At the end of the Carnian, a reef crisis occurred in South China. Serpulids appeared in the Middle Triassic. Microconchids were abundant. The shelled cephalopods called ammonites recovered, diversifying from a single line that survived the Permian extinction. Bivalves began to rapidly diversify during

4816-402: The Early Triassic, while others (e.g. capitosaurs ) remained successful throughout the whole period, or only came to prominence in the Late Triassic (e.g. Plagiosaurus , metoposaurs ). The first Lissamphibians (modern amphibians) appear in the Triassic, with the progenitors of the first frogs already present by the Early Triassic. However, the group as a whole did not become common until

4928-549: The Early and Middle Triassic. Sea level rise accelerated in the Ladinian, culminating with a sea level up to 50 metres (164 ft) above present-day levels during the Carnian. Sea level began to decline in the Norian, reaching a low of 50 metres (164 ft) below present sea level during the mid-Rhaetian. Low global sea levels persisted into the earliest Jurassic. The long-term sea level trend

5040-403: The Jurassic. The Triassic was named in 1834 by Friedrich August von Alberti , after a succession of three distinct rock layers (Greek triás meaning 'triad') that are widespread in southern Germany : the lower Buntsandstein (colourful sandstone ) , the middle Muschelkalk (shell-bearing limestone ) and the upper Keuper (coloured clay ). On the geologic time scale , the Triassic

5152-602: The Jurassic. There were many types of marine reptiles. These included the Sauropterygia , which featured pachypleurosaurus and nothosaurs (both common during the Middle Triassic, especially in the Tethys region), placodonts , the earliest known herbivorous marine reptile Atopodentatus , and the first plesiosaurs . The first of the lizardlike Thalattosauria ( askeptosaurs ) and the highly successful ichthyopterygians , which appeared in Early Triassic seas, soon diversified. By

5264-580: The Latest Olenekian Cooling (LOC), from 248 to 247 Ma, temperatures cooled by about 6 °C. The Middle Triassic was cooler than the Early Triassic, with temperatures falling over most of the Anisian, with the exception of a warming spike in the latter portion of the stage. From 242 to 233 Ma, the Ladinian-Carnian Cooling (LCC) ensued. At the beginning of the Carnian, global temperatures continued to be relatively cool. The eruption of

5376-478: The Middle Triassic, becoming highly abundant in the oceans. Aquatic insects rapidly diversified during the Middle Triassic, with this time interval representing a crucial diversification for Holometabola , the clade containing the majority of modern insect species. In the wake of the Permian-Triassic mass extinction event , the fish fauna was remarkably uniform, with many families and genera exhibiting

5488-597: The Middle Triassic, some ichthyopterygians were achieving very large body masses. Among other reptiles, the earliest turtles , like Proganochelys and Proterochersis , appeared during the Norian Age (Stage) of the Late Triassic Period. The Lepidosauromorpha , specifically the Sphenodontia , are first found in the fossil record of the earlier Carnian Age, though the earliest lepidosauromorphs likely occurred in

5600-450: The Permian extinction, Archaeplastida (red and green algae) had been the major marine phytoplanktons since about 659–645 million years ago, when they replaced marine planktonic cyanobacteria , which first appeared about 800 million years ago, as the dominant phytoplankton in the oceans. In the Triassic, secondary endosymbiotic algae became the most important plankton. In marine environments , new modern types of corals appeared in

5712-470: The Permian. The Procolophonidae , the last surviving parareptiles , were an important group of small lizard-like herbivores. The drepanosaurs were a clade of unusual, chameleon-like arboreal reptiles with birdlike heads and specialised claws. Three therapsid groups survived into the Triassic: dicynodonts , therocephalians , and cynodonts . The cynodont Cynognathus was a characteristic top predator in

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5824-408: The Triassic (teleosts are by far the most diverse group of fish today). Predatory actinopterygians such as saurichthyids and birgeriids , some of which grew over 1.2 m (3.9 ft) in length, appeared in the Early Triassic and became widespread and successful during the period as a whole. Lakes and rivers were populated by lungfish (Dipnoi), such as Ceratodus , which are mainly known from

5936-497: The Triassic and survived the extinction event. The earliest known neopterygian fish, including early holosteans and teleosts , appeared near the beginning of the Triassic, and quickly diversified to become among the dominant groups of fish in both freshwater and marine habitats. The vast supercontinent of Pangaea dominated the globe during the Triassic, but in the latest Triassic ( Rhaetian ) and Early Jurassic it began to gradually rift into two separate landmasses: Laurasia to

6048-643: The Triassic record: survivors from the extinction event, new groups that flourished briefly, and other new groups that went on to dominate the Mesozoic Era. Reptiles , especially archosaurs , were the chief terrestrial vertebrates during this time. A specialized group of archosaurs, called dinosaurs , first appeared in the Late Triassic but did not become dominant until the succeeding Jurassic Period. Archosaurs that became dominant in this period were primarily pseudosuchians , relatives and ancestors of modern crocodilians , while some archosaurs specialized in flight,

6160-588: The Triassic, enlarging the Neo-Tethys Ocean which formed in their wake. At the same time, they forced the Paleo-Tethys Ocean to shrink as it was being subducted under Asia. By the end of the Triassic, the Paleo-Tethys Ocean occupied a small area and the Cimmerian terranes began to collide with southern Asia. This collision, known as the Cimmerian Orogeny , continued into the Jurassic and Cretaceous to produce

6272-796: The Wrangellia Large Igneous Province around 234 Ma caused abrupt global warming, terminating the cooling trend of the LCC. This warming was responsible for the Carnian Pluvial Event and resulted in an episode of widespread global humidity. The CPE ushered in the Mid-Carnian Warm Interval (MCWI), which lasted from 234 to 227 Ma. At the Carnian-Norian boundary occurred a positive δ C excursion believed to signify an increase in organic carbon burial. From 227 to 217 Ma, there

6384-517: The barons of Kinderton, Halton, Malbank, Mold, Shipbrook, Dunham-Massey, and the honour of Chester itself. Feudal baronies or baronies by tenure were granted by the Earl as forms of feudal land tenure within the palatinate in a similar way to which the king granted English feudal baronies within England proper. An example is the barony of Halton. One of Hugh d'Avranche's barons has been identified as Robert Nicholls, Baron of Halton and Montebourg. In 1182,

6496-450: The bizarre long-necked archosauromorph Tanystropheus ), along with some terrestrial forms like Ticinosuchus and Macrocnemus , have been recovered from this locality. All these fossils date from the Anisian and Ladinian ages (about 242 Ma ago). The Triassic Period ended with a mass extinction, which was particularly severe in the oceans; the conodonts disappeared, as did all

6608-788: The borders of the Halton and Warrington districts, towns and cities such as Chester, Macclesfield, Alsager, Congleton, Northwich, Ellesmere Port, Knutsford, Warrington, Poynton, Disley, Neston, Wilmslow, Runcorn, and Widnes are either surrounded wholly, partially enveloped by, or on the fringes of the belts. The North Cheshire Green Belt is contiguous with the Peak District Park boundary inside Cheshire. The ceremonial county borders Merseyside , Greater Manchester , Derbyshire , Staffordshire and Shropshire in England along with Flintshire and Wrexham in Wales, arranged by compass directions as shown in

6720-675: The change. Cheshire has no county-wide elected local council, but it does have a Lord Lieutenant under the Lieutenancies Act 1997 and a High Sheriff under the Sheriffs Act 1887 . Local government functions apart from the Police and Fire/Rescue services are carried out by four smaller unitary authorities: Cheshire East , Cheshire West and Chester , Halton , and Warrington . All four unitary authority areas have borough status . Policing and fire and rescue services are still provided across

6832-493: The county are primarily rural, while the north is more densely populated and includes the settlements of Runcorn , Widnes , and Ellesmere Port . For local government purposes Cheshire comprises four unitary authority areas: Cheshire East , Cheshire West and Chester , Halton , and Warrington . The county historically included all of the Wirral Peninsula and parts of southern Greater Manchester and northern Derbyshire, but excluded Widnes and Warrington. The landscape of

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6944-410: The county as a whole. The Cheshire Fire Authority consist of members of the four councils, while governance of Cheshire Constabulary is performed by the elected Cheshire Police and Crime Commissioner . Winsford is a major administrative hub for Cheshire with the Police and Fire & Rescue Headquarters based in the town as well as a majority of Cheshire West and Chester Council. It was also home to

7056-418: The county is dominated by the Cheshire Plain , an area of relatively flat land divided by the Mid-Cheshire Ridge . To the west, Cheshire contains the south of the Wirral Peninsula, and to the east the landscape rises to the Pennines , where the county contains part of the Peak District . The River Mersey runs through the north of Cheshire before broadening into its wide estuary; the River Dee forms part of

7168-732: The county's border with Wales, then fully enters England and flows through the city of Chester before re-entering Wales upstream of its estuary. Red Triassic sandstone forms the bedrock of much of the county, and was used in the construction of many of its buildings. The culture of Cheshire has impacted global pop culture by producing actors such as Daniel Craig , Tim Curry , and Pete Postlethwaite ; athletes such as Shauna Coxsey , Tyson Fury , and Paula Radcliffe ; authors such as Lewis Carroll ; comedians such as John Bishop and Ben Miller ; and musicians such as Gary Barlow , Ian Curtis , and Harry Styles . Most places are involved in agriculture and chemistry, leading to Cheshire's reputation for

7280-434: The county, the University of Chester and the Chester campus of The University of Law . The Crewe campus of Manchester Metropolitan University was scheduled to close in 2019. Cheshire has produced musicians such as Joy Division members Ian Curtis and Stephen Morris , One Direction member Harry Styles , the members of The 1975 , Take That member Gary Barlow , The Cult member Ian Astbury , Catfish and

7392-447: The dental plates, abundant in the fossils record. Hybodonts , a group of shark-like cartilaginous fish , were dominant in both freshwater and marine environments throughout the Triassic. Last survivors of the mainly Palaeozoic Eugeneodontida are known from the Early Triassic. Temnospondyl amphibians were among those groups that survived the Permian–Triassic extinction. Once abundant in both terrestrial and aquatic environments,

7504-417: The distinction on Richard's fall in 1399. Through the Local Government Act 1972 , which came into effect on 1 April 1974, some areas in the north became part of the metropolitan counties of Greater Manchester and Merseyside . Stockport (previously a county borough), Altrincham , Hyde , Dukinfield and Stalybridge in the north-east became part of Greater Manchester. Much of the Wirral Peninsula in

7616-428: The dominant carnivores in the early Triassic. Phytosaurs were a particularly common group which prospered during the Late Triassic. These long-snouted and semiaquatic predators resemble living crocodiles and probably had a similar lifestyle, hunting for fish and small reptiles around the water's edge. However, this resemblance is only superficial and is a prime-case of convergent evolution. True archosaurs appeared in

7728-444: The earldom forfeit and gave the title to Hugh d'Avranches (nicknamed Hugh Lupus, or "wolf"). Because of Cheshire's strategic location on the Welsh Marches , the Earl had complete autonomous powers to rule on behalf of the king in the county palatine. Cheshire in the Domesday Book (1086) is recorded as a much larger county than it is today. It included two hundreds , Atiscross and Exestan, that later became part of North Wales . At

7840-405: The early Triassic, splitting into two branches: Avemetatarsalia (the ancestors to birds) and Pseudosuchia (the ancestors to crocodilians). Avemetatarsalians were a minor component of their ecosystems, but eventually produced the earliest pterosaurs and dinosaurs in the Late Triassic. Early long-tailed pterosaurs appeared in the Norian and quickly spread worldwide. Triassic dinosaurs evolved in

7952-432: The energy and water sector and there was also a significant reduction in the manufacturing sector. The largest growth during this period was in the other services and distribution, hotels and retail sectors. Cheshire is considered to be an affluent county. However, towns such as Crewe and Winsford have significant deprivation. The county's proximity to the cities of Manchester and Liverpool means counter urbanisation

8064-607: The entire Phanerozoic, seeing as it occurred during and immediately after the discharge of titanic volumes of greenhouse gases from the Siberian Traps. The Early Triassic began with the Permian-Triassic Thermal Maximum (PTTM) and was followed by the brief Dienerian Cooling (DC) from 251 to 249 Ma, which was in turn followed by the Latest Smithian Thermal Maximum (LSTT) around 249 to 248 Ma. During

8176-467: The equator and extended between the poles, though it did drift northwards as the period progressed. Southern Pangea, also known as Gondwana , was made up by closely-appressed cratons corresponding to modern South America , Africa , Madagascar , India , Antarctica , and Australia . North Pangea, also known as Laurussia or Laurasia , corresponds to modern-day North America and the fragmented predecessors of Eurasia . The western edge of Pangea lay at

8288-473: The extinct family Cheirolepidiaceae , which first appeared in the Late Triassic, and would be prominent throughout most of the rest of the Mesozoic. No known coal deposits date from the start of the Triassic Period. This is known as the Early Triassic "coal gap" and can be seen as part of the Permian–Triassic extinction event . Possible explanations for the coal gap include sharp drops in sea level at

8400-406: The first time among vertebrates, becoming the pterosaurs . Therapsids , the dominant vertebrates of the preceding Permian period, saw a brief surge in diversification in the Triassic, with dicynodonts and cynodonts quickly becoming dominant, but they declined throughout the period with the majority becoming extinct by the end. However, the first stem-group mammals ( mammaliamorphs ), themselves

8512-411: The former Vale Royal Borough Council and Cheshire County Council. Devolution talks for the county are scheduled for Autumn 2024. From 1 April 1974 the area under the control of the county council was divided into eight local government districts; Chester , Congleton , Crewe and Nantwich , Ellesmere Port and Neston , Halton , Macclesfield , Vale Royal and Warrington . Halton (which includes

8624-510: The global ocean triggered intense cross-equatorial monsoons , sometimes referred to as the Pangean megamonsoons . The Triassic may have mostly been a dry period, but evidence exists that it was punctuated by several episodes of increased rainfall in tropical and subtropical latitudes of the Tethys Sea and its surrounding land. Sediments and fossils suggestive of a more humid climate are known from

8736-521: The historic county of Cheshire was Black Hill (582 m (1,909 ft)) near Crowden in the Cheshire Panhandle, a long eastern projection of the county which formerly stretched along the northern side of Longdendale and on the border with the West Riding of Yorkshire . Black Hill is now the highest point in the ceremonial county of West Yorkshire . Within the current ceremonial county and

8848-420: The impact. So, the evidence suggests the Manicouagan impact preceded the end of the Triassic by approximately 10±2 Ma. It could not therefore be the immediate cause of the observed mass extinction. The number of Late Triassic extinctions is disputed. Some studies suggest that there are at least two periods of extinction towards the end of the Triassic, separated by 12 to 17 million years. But arguing against this

8960-624: The judicial review it lost in October 2007. The appeal was dismissed on 4 March 2008. A plain of glacial till and other glacio-fluvial sediments extends across much of Cheshire, separating the hills of North Wales and the Pennines . Known as the Cheshire Plain , it was formed following the retreat of a Quaternary ice sheet which left the area dotted with kettle holes , those which hold water being referred to as meres . The bedrock of this region

9072-401: The keystone predators of most Triassic terrestrial ecosystems. Over 25 species have been found, including giant quadrupedal hunters, sleek bipedal omnivores, and lumbering beasts with deep sails on their backs. They probably occupied the large-predator niche later filled by theropods. "Rauisuchians" were ancestral to small, lightly-built crocodylomorphs, the only pseudosuchians which survived into

9184-474: The land north of the Mersey became administered as part of the new county of Lancashire , resolving any uncertainty about the county in which the land "Inter Ripam et Mersam" was. Over the years, the ten hundreds consolidated and changed names to leave just seven—Broxton, Bucklow, Eddisbury, Macclesfield, Nantwich, Northwich and Wirral. In 1397 the county had lands in the march of Wales added to its territory, and

9296-540: The mammaliaforms to develop fur and a higher metabolic rate . Two Early Triassic lagerstätten (high-quality fossil beds), the Dienerian aged Guiyang biota and the earliest Spathian aged Paris biota stand out due to their exceptional preservation and diversity . They represent the earliest lagerstätten of the Mesozoic era and provide insight into the biotic recovery from the Permian-Triassic mass extinction event. The Monte San Giorgio lagerstätte, now in

9408-573: The margin of an enormous ocean, Panthalassa ( lit.   ' entire sea ' ), which roughly corresponds to the modern Pacific Ocean . Practically all deep-ocean crust present during the Triassic has been recycled through the subduction of oceanic plates, so very little is known about the open ocean from this time period. Most information on Panthalassan geology and marine life is derived from island arcs and rare seafloor sediments accreted onto surrounding land masses, such as present-day Japan and western North America. The eastern edge of Pangea

9520-453: The marine reptiles except ichthyosaurs and plesiosaurs . Invertebrates like brachiopods and molluscs (such as gastropods ) were severely affected. In the oceans, 22% of marine families and possibly about half of marine genera went missing. Though the end-Triassic extinction event was not equally devastating in all terrestrial ecosystems, several important clades of crurotarsans (large archosaurian reptiles previously grouped together as

9632-430: The next most common tetrapods, and early dinosaurs, passed through unchanged. However, both phytosaurs and aetosaurs were among the groups of archosaur reptiles completely wiped out by the end-Triassic extinction event. It seems likely then that there was some sort of end-Carnian extinction, when several herbivorous archosauromorph groups died out, while the large herbivorous therapsids —the kannemeyeriid dicynodonts and

9744-512: The north and Gondwana to the south. The global climate during the Triassic was mostly hot and dry, with deserts spanning much of Pangaea's interior. However, the climate shifted and became more humid as Pangaea began to drift apart. The end of the period was marked by yet another major mass extinction, the Triassic–Jurassic extinction event , that wiped out many groups, including most pseudosuchians, and allowed dinosaurs to assume dominance in

9856-820: The north-west, including the county boroughs of Birkenhead and Wallasey, joined Merseyside as the Metropolitan Borough of Wirral . At the same time the Tintwistle Rural District was transferred to Derbyshire . The area of south Lancashire not included within either the Merseyside or Greater Manchester counties, including Widnes and the county borough of Warrington , was added to the new non-metropolitan county of Cheshire. Halton and Warrington became unitary authorities independent of Cheshire County Council on 1 April 1998, but remain part of Cheshire for ceremonial purposes and also for fire and policing. Halton

9968-402: The order Isoetales (which contains living quillworts ), rose to prominence due to the environmental instability following the Permian-Triassic extinction, with one particularly notable example being the genus Pleuromeia , which grew in columnar like fashion, sometimes reaching a height of 2 metres (6.6 ft). The relevance of lycophytes declined from the Middle Triassic onwards, following

10080-413: The population, and 10,994 (2%) in ethnic groups other than white. Of the 2% in non-white ethnic groups: In the 2001 Census, 81% of the population (542,413) identified themselves as Christian; 124,677 (19%) did not identify with any religion or did not answer the question; 5,665 (1%) identified themselves as belonging to other major world religions; and 1,033 belonged to other religions. The boundary of

10192-575: The production of chemicals, Cheshire cheese , salt, and silk. Cheshire's name was originally derived from an early name for Chester, and was first recorded as Legeceasterscir in the Anglo-Saxon Chronicle , meaning "the shire of the city of legions". Although the name first appears in 980, it is thought that the county was created by Edward the Elder around 920. In the Domesday Book , Chester

10304-413: The proposal to split two-tier Cheshire into two would proceed. Cheshire County Council leader Paul Findlow, who attempted High Court legal action against the proposal, claimed that splitting Cheshire would only disrupt excellent services while increasing living costs for all. On 31 January 2008 The Standard , Cheshire and district's newspaper, announced that the legal action had been dropped. Members against

10416-570: The proposal were advised that they may be unable to persuade the court that the decision of Hazel Blears was "manifestly absurd". The Cheshire West and Chester unitary authority covers the area formerly occupied by the City of Chester and the boroughs of Ellesmere Port and Neston and Vale Royal; Cheshire East now covers the area formerly occupied by the boroughs of Congleton, Crewe and Nantwich, and Macclesfield. The changes were implemented on 1 April 2009. Congleton Borough Council pursued an appeal against

10528-478: The return of more stable environmental conditions. While having first appeared during the Permian, the extinct seed plant group Bennettitales first became a prominent element in global floras during the Late Triassic, a position they would hold for much of the Mesozoic. In the Southern Hemisphere landmasses of Gondwana, the tree Dicroidium , an extinct " seed fern " belong to the order Corystospermales

10640-472: The start of 2003, there were 22,020 VAT-registered enterprises in Cheshire, an increase of 7% since 1998, many in the business services (31.9%) and wholesale/retail (21.7%) sectors. Between 2002 and 2003 the number of businesses grew in four sectors: public administration and other services (6.0%), hotels and restaurants (5.1%), construction (1.7%), and business services (1.0%). The county saw the largest proportional reduction between 2001 and 2002 in employment in

10752-594: The table. below. Cheshire also forms part of the North West England region. In July 2022, beavers bred in Cheshire for the first time in 400 years, following a reintroduction scheme. Based on the Census of 2001, the overall population of Cheshire East and Cheshire West and Chester is 673,781, of which 51.3% of the population were male and 48.7% were female. Of those aged between 0–14 years, 51.5% were male and 48.4% were female; and of those aged over 75 years, 62.9% were female and 37.1% were male. This increased to 699,735 at

10864-647: The terminus of the Triassic, there was an extreme warming event referred to as the End-Triassic Thermal Event (ETTE), which was responsible for the Triassic-Jurassic mass extinction. Bubbles of carbon dioxide in basaltic rocks dating back to the end of the Triassic indicate that volcanic activity from the Central Atlantic Magmatic Province helped trigger climate change in the ETTE. During the Early Triassic, lycophytes , particularly those of

10976-587: The terrestrial species had mostly died out during the extinction event. The Triassic survivors were aquatic or semi-aquatic, and were represented by Tupilakosaurus , Thabanchuia , Branchiosauridae and Micropholis , all of which died out in Early Triassic, and the successful Stereospondyli , with survivors into the Cretaceous Period. The largest Triassic stereospondyls, such as Mastodonsaurus , were up to 4 to 6 metres (13 to 20 ft) in length. Some lineages (e.g. trematosaurs ) flourished briefly in

11088-517: The time of the Domesday Book, it also included as part of Duddestan Hundred the area of land later known as English Maelor (which used to be a detached part of Flintshire ) in Wales. The area between the Mersey and Ribble (referred to in the Domesday Book as "Inter Ripam et Mersam") formed part of the returns for Cheshire. Although this has been interpreted to mean that at that time south Lancashire

11200-570: The time of the Permo-Triassic boundary; acid rain from the Siberian Traps eruptions or from an impact event that overwhelmed acidic swamps; climate shift to a greenhouse climate that was too hot and dry for peat accumulation; evolution of fungi or herbivores that were more destructive of wetlands; the extinction of all plants adapted to peat swamps, with a hiatus of several million years before new plant species evolved that were adapted to peat swamps; or soil anoxia as oxygen levels plummeted. Before

11312-602: The towns of Runcorn and Widnes ) and Warrington became unitary authorities in 1998. The remaining districts and the county were abolished as part of local government restructuring on 1 April 2009. The Halton and Warrington boroughs were not affected by the 2009 restructuring. On 25 July 2007, the Secretary of State Hazel Blears announced she was 'minded' to split Cheshire into two new unitary authorities, Cheshire West and Chester , and Cheshire East . She confirmed she had not changed her mind on 19 December 2007 and therefore

11424-479: The unitary authority of Cheshire East the highest point is Shining Tor on the Derbyshire/Cheshire border between Macclesfield and Buxton , at 559 metres (1,834 ft) above sea level. After Shining Tor, the next highest point in Cheshire is Shutlingsloe , at 506 metres (1,660 ft) above sea level. Shutlingsloe lies just to the south of Macclesfield Forest and is sometimes humorously referred to as

11536-649: The west is a prominent sandstone ridge known as the Mid Cheshire Ridge . A 55-kilometre (34 mi) footpath, the Sandstone Trail , follows this ridge from Frodsham to Whitchurch passing Delamere Forest , Beeston Castle and earlier Iron Age forts. The western fringes of the Peak District - the southernmost extent of the Pennine range - form the eastern part of the county. The highest point (county top) in

11648-594: Was a dominant element in forest habitats across the region during the Middle-Late Triassic. During the Late Triassic, the Ginkgoales (which today are represented by only a single species, Ginkgo biloba ) underwent considerable diversification. Conifers were abundant during the Triassic, and included the Voltziales (which contains various lineages, probably including those ancestral to modern conifers), as well as

11760-646: Was a relatively cool period known as the Early Norian Cool Interval (ENCI), after which occurred the Mid-Norian Warm Interval (MNWI) from 217 to 209 Ma. The MNWI was briefly interrupted around 214 Ma by a cooling possibly related to the Manicouagan impact . Around 212 Ma, a 10 Myr eccentricity maximum caused a paludification of Pangaea and a reduction in the size of arid climatic zones. The Rhaetian Cool Interval (RCI) lasted from 209 to 201 Ma. At

11872-491: Was accompanied by huge volcanic eruptions that occurred as the supercontinent Pangaea began to break apart about 202 to 191 million years ago (40Ar/39Ar dates), forming the Central Atlantic Magmatic Province (CAMP), one of the largest known inland volcanic events since the planet had first cooled and stabilized. Other possible but less likely causes for the extinction events include global cooling or even

11984-629: Was allocated to dairy farming, with another 11.78 km allocated to cattle and sheep. The chemical industry in Cheshire was founded in Roman times, with the mining of salt in Winsford, Middlewich and Northwich. Salt is still mined in the area by British Salt . The salt mining has led to a continued chemical industry around Northwich, with Brunner Mond based in the town. Other chemical companies, including Ineos (formerly ICI ), have plants at Runcorn . The Essar Refinery (formerly Shell Stanlow Refinery )

12096-479: Was encroached upon by a pair of extensive oceanic basins: The Neo-Tethys (or simply Tethys) and Paleo-Tethys Oceans . These extended from China to Iberia, hosting abundant marine life along their shallow tropical peripheries. They were divided from each other by a long string of microcontinents known as the Cimmerian terranes . Cimmerian crust had detached from Gondwana in the early Permian and drifted northwards during

12208-548: Was part of Cheshire, more exhaustive research indicates that the boundary between Cheshire and what was to become Lancashire remained the River Mersey . With minor variations in spelling across sources, the complete list of hundreds of Cheshire at this time are: Atiscross, Bochelau, Chester, Dudestan, Exestan, Hamestan, Middlewich, Riseton, Roelau, Tunendune, Warmundestrou and Wilaveston. There were 8 feudal baronies in Chester,

12320-447: Was promoted to the rank of principality. This was because of the support the men of the county had given to King Richard II, in particular by his standing armed force of about 500 men called the "Cheshire Guard". As a result, the King's title was changed to "King of England and France, Lord of Ireland, and Prince of Chester". No other English county has been honoured in this way, although it lost

12432-413: Was recorded as having the name Cestrescir (Chestershire), derived from the name for Chester at the time. Through the next few centuries a series of changes that occurred in the English language, which have included simplifications and elision , has resulted in the name Cheshire. Because of the historically close links with the land bordering Cheshire to the west, which became modern Wales , there

12544-463: Was sufficiently independent from the kingdom of England that the 13th-century Magna Carta did not apply to the shire of Chester , so the earl wrote up his own Chester Charter at the petition of his barons. William I made Cheshire a county palatine and gave Gerbod the Fleming the new title of Earl of Chester . When Gerbod returned to Normandy in about 1070, the king used his absence to declare

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