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41-534: Kesova Gora was known since approximately 1238, and it apparently was formed from a combination various smaller settlements: Krasny, Zaychy, and Grachi. Originally, the settlement was called Kyasova Gora , meaning " clay -filled region" in Finnish . For a long time, it was a votchina of the Prozorovsky noble family. One of the most important landmarks of the settlement is the still-functioning Saint Nicholas Church. In

82-575: A gel of orthosilicic acid ).) The clay minerals formed depend on the composition of the source rock and the climate. Acid weathering of feldspar -rich rock, such as granite , in warm climates tends to produce kaolin. Weathering of the same kind of rock under alkaline conditions produces illite . Smectite forms by weathering of igneous rock under alkaline conditions, while gibbsite forms by intense weathering of other clay minerals. There are two types of clay deposits: primary and secondary. Primary clays form as residual deposits in soil and remain at

123-836: A great capacity to take up water, and they increase greatly in volume when they do so. When dried, they shrink back to their original volume. This produces distinctive textures, such as mudcracks or "popcorn" texture, in clay deposits. Soils containing swelling clay minerals (such as bentonite ) pose a considerable challenge for civil engineering, because swelling clay can break foundations of buildings and ruin road beds. Clay minerals most commonly form by prolonged chemical weathering of silicate-bearing rocks. They can also form locally from hydrothermal activity. Chemical weathering takes place largely by acid hydrolysis due to low concentrations of carbonic acid , dissolved in rainwater or released by plant roots. The acid breaks bonds between aluminium and oxygen, releasing other metal ions and silica (as

164-402: A major challenge in civil engineering . The defining mechanical property of clay is its plasticity when wet and its ability to harden when dried or fired. Clays show a broad range of water content within which they are highly plastic, from a minimum water content (called the plastic limit ) where the clay is just moist enough to mould, to a maximum water content (called the liquid limit) where

205-468: A sophisticated accounting system. In this cultural region, tablets were never fired deliberately as the clay was recycled on an annual basis. However, some of the tablets were "fired" as a result of uncontrolled fires in the buildings where they were stored. The rest, remain tablets of unfired clay and are therefore extremely fragile. For this reason, some institutions are investigating the possibility of firing them now to aid in their preservation. Writing

246-437: A variety of colours from impurities, such as a reddish or brownish colour from small amounts of iron oxide . Clays develop plasticity when wet but can be hardened through firing . Clay is the longest-known ceramic material. Prehistoric humans discovered the useful properties of clay and used it for making pottery . Some of the earliest pottery shards have been dated to around 14,000 BCE, and clay tablets were

287-452: Is Armenian bole , which is used to soothe an upset stomach. Some animals such as parrots and pigs ingest clay for similar reasons. Kaolin clay and attapulgite have been used as anti-diarrheal medicines. Clay as the defining ingredient of loam is one of the oldest building materials on Earth , among other ancient, naturally occurring geologic materials such as stone and organic materials like wood. Between one-half and two-thirds of

328-620: Is a unique type of marine clay indigenous to the glaciated terrains of Norway , North America , Northern Ireland , and Sweden . It is a highly sensitive clay, prone to liquefaction , and has been involved in several deadly landslides . Modelling clay is used in art and handicraft for sculpting . Clays are used for making pottery , both utilitarian and decorative, and construction products, such as bricks, walls, and floor tiles. Different types of clay, when used with different minerals and firing conditions, are used to produce earthenware, stoneware, and porcelain. Prehistoric humans discovered

369-462: Is also available in the area, but it only travels to closer locations. A road that travels from Kashin to Bezhetsk also passes through the settlement. Kesova Gora contains one cultural heritage monuments of federal significance and additionally two objects classified as cultural and historical heritage of local significance. The federal monument is the Saint Nicholas Church (1770s) whereas

410-459: Is clay with visible annual layers that are formed by seasonal deposition of those layers and are marked by differences in erosion and organic content. This type of deposit is common in former glacial lakes . When fine sediments are delivered into the calm waters of these glacial lake basins away from the shoreline, they settle to the lake bed. The resulting seasonal layering is preserved in an even distribution of clay sediment banding. Quick clay

451-674: Is important to soil fertility. Clay is a common component of sedimentary rock . Shale is formed largely from clay and is the most common of sedimentary rocks. However, most clay deposits are impure. Many naturally occurring deposits include both silts and clay. Clays are distinguished from other fine-grained soils by differences in size and mineralogy. Silts , which are fine-grained soils that do not include clay minerals, tend to have larger particle sizes than clays. There is, however, some overlap in particle size and other physical properties. The distinction between silt and clay varies by discipline. Geologists and soil scientists usually consider

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492-558: Is known as pictograms . Pictograms are symbols that express a pictorial concept, a logogram , as the meaning of the word. Early writing also began in Ancient Egypt using hieroglyphs . Early hieroglyphs and some of the modern Chinese characters are other examples of pictographs. The Sumerians later shifted their writing to Cuneiform, defined as "Wedge writing" in Latin, which added phonetic symbols, syllabograms . Text on clay tablets took

533-524: Is the most common sedimentary rock. Although many naturally occurring deposits include both silts and clay, clays are distinguished from other fine-grained soils by differences in size and mineralogy. Silts , which are fine-grained soils that do not include clay minerals, tend to have larger particle sizes than clays. Mixtures of sand , silt and less than 40% clay are called loam . Soils high in swelling clays ( expansive clay ), which are clay minerals that readily expand in volume when they absorb water, are

574-512: Is used in many industrial processes, such as paper making, cement production, and chemical filtering . Bentonite clay is widely used as a mold binder in the manufacture of sand castings . Clay is a common filler used in polymer nanocomposites . It can reduce the cost of the composite, as well as impart modified behavior: increased stiffness , decreased permeability , decreased electrical conductivity , etc. Traditional uses of clay as medicine go back to prehistoric times. An example

615-407: The clay tablet. Some of the recipes were stew, which was made with goat, garlic, onions and sour milk. By the end of the 3rd Millennium BCE, (2200–2000 BCE), even the "short story" was first attempted, as independent scribes entered into the philosophical arena, with stories like: " Debate between bird and fish ", and other topics, ( List of Sumerian debates ). Communication grew faster as now there

656-428: The clay; the clay tablets themselves came in a variety of colors such as bone white, chocolate, and charcoal. Pictographs then began to appear on clay tablets around 4000 BCE, and after the later development of Sumerian cuneiform writing, a more sophisticated partial syllabic script evolved that by around 2500 BCE was capable of recording the vernacular, the everyday speech of the common people. Sumerians used what

697-415: The cohesion that makes it plastic. In kaolinite clay, the bonding between plates is provided by a film of water molecules that hydrogen bond the plates together. The bonds are weak enough to allow the plates to slip past each other when the clay is being moulded, but strong enough to hold the plates in place and allow the moulded clay to retain its shape after it is moulded. When the clay is dried, most of

738-506: The course of the administrative reform carried out in 1708 by Peter the Great , Kesova Gora was included into Ingermanland Governorate (known since 1710 as Saint Petersburg Governorate ), but in 1727 it was transferred to Moscow Governorate . In 1775, Tver Viceroyalty was formed from the lands which previously belonged to Moscow and Novgorod Governorates . Kesova Gora was a part of Kashinsky Uyezd of Tver Viceroyalty. In 1796, Tver Viceroyalty

779-399: The first known writing medium. Clay is used in many modern industrial processes, such as paper making, cement production, and chemical filtering . Between one-half and two-thirds of the world's population live or work in buildings made with clay, often baked into brick, as an essential part of its load-bearing structure. Clay is a very common substance. Shale , formed largely from clay,

820-516: The first known writing medium. Clay was chosen due to the local material being easy to work with and widely available. Scribes wrote on the tablets by inscribing them with a script known as cuneiform , using a blunt reed called a stylus , which effectively produced the wedge shaped markings of their writing. After being written on, clay tablets could be reworked into fresh tablets and reused if needed, or fired to make them permanent records. Purpose-made clay balls were used as sling ammunition . Clay

861-407: The forms of myths, fables, essays, hymns, proverbs, epic poetry, business records, laws, plants, and animals. What these clay tablets allowed was for individuals to record who and what was significant. An example of these great stories was Epic of Gilgamesh . This story would tell of the great flood that destroyed Sumer. Remedies and recipes that would have been unknown were then possible because of

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902-677: The local monuments are the Transfiguration Church (1800) and the monument to Aleksey Alelyukhin , a military pilot and double Hero of the Soviet Union , who was born in Kesova Gora. There is a local museum in Kesova Gora. Clay Clay is a type of fine-grained natural soil material containing clay minerals (hydrous aluminium phyllosilicates, e.g. kaolinite , Al 2 Si 2 O 5 ( OH ) 4 ). Most pure clay minerals are white or light-coloured, but natural clays show

943-404: The material. The clay mineral kaolinite is transformed into a non-clay material, metakaolin , which remains rigid and hard if moistened again. Further firing through the stoneware and porcelain stages further recrystallizes the metakaolin into yet stronger minerals such as mullite . The tiny size and plate form of clay particles gives clay minerals a high surface area. In some clay minerals,

984-724: The moulded clay is just dry enough to hold its shape. The plastic limit of kaolinite clay ranges from about 36% to 40% and its liquid limit ranges from about 58% to 72%. High-quality clay is also tough, as measured by the amount of mechanical work required to roll a sample of clay flat. Its toughness reflects a high degree of internal cohesion. Clay has a high content of clay minerals that give it its plasticity. Clay minerals are hydrous aluminium phyllosilicate minerals , composed of aluminium and silicon ions bonded into tiny, thin plates by interconnecting oxygen and hydroxide ions. These plates are tough but flexible, and in moist clay, they adhere to each other. The resulting aggregates give clay

1025-462: The okrugs were abolished, and the districts were directly subordinated to the oblast. On January 29, 1935 Kalinin Oblast was established, and Kesovogorsky District was transferred to Tver Oblast. On February 13, 1963, during the abortive Khrushchyov administrative reform, Sonkovsky District was merged into Bezhetsky District, but on January 12, 1965 it was re-established. In 1975, Kesova Gora

1066-467: The plates carry a negative electrical charge that is balanced by a surrounding layer of positive ions ( cations ), such as sodium, potassium, or calcium. If the clay is mixed with a solution containing other cations, these can swap places with the cations in the layer around the clay particles, which gives clays a high capacity for ion exchange . The chemistry of clay minerals, including their capacity to retain nutrient cations such as potassium and ammonium,

1107-619: The removal of heavy metals from waste water and air purification. Clay tablet In the Ancient Near East , clay tablets ( Akkadian ṭuppu(m) 𒁾 ) were used as a writing medium, especially for writing in cuneiform , throughout the Bronze Age and well into the Iron Age . Cuneiform characters were imprinted on a wet clay tablet with a stylus often made of reed ( reed pen ). Once written upon, many tablets were dried in

1148-503: The root of the first libraries . Tens of thousands of written tablets, including many fragments, have been found in the Middle East. Surviving tablet-based documents from the Minoan / Mycenaean civilizations, are mainly those which were used for accounting. Tablets serving as labels with the impression of the side of a wicker basket on the back, and tablets showing yearly summaries, suggest

1189-696: The separation to occur at a particle size of 2 μm (clays being finer than silts), sedimentologists often use 4–5 μm, and colloid chemists use 1 μm. Clay-size particles and clay minerals are not the same, despite a degree of overlap in their respective definitions. Geotechnical engineers distinguish between silts and clays based on the plasticity properties of the soil, as measured by the soils' Atterberg limits . ISO 14688 grades clay particles as being smaller than 2 μm and silt particles as being larger. Mixtures of sand , silt and less than 40% clay are called loam . Some clay minerals (such as smectite ) are described as swelling clay minerals, because they have

1230-841: The site of formation. Secondary clays are clays that have been transported from their original location by water erosion and deposited in a new sedimentary deposit. Secondary clay deposits are typically associated with very low energy depositional environments such as large lakes and marine basins. The main groups of clays include kaolinite , montmorillonite - smectite , and illite . Chlorite , vermiculite , talc , and pyrophyllite are sometimes also classified as clay minerals. There are approximately 30 different types of "pure" clays in these categories, but most "natural" clay deposits are mixtures of these different types, along with other weathered minerals. Clay minerals in clays are most easily identified using X-ray diffraction rather than chemical or physical tests. Varve (or varved clay )

1271-402: The sun or air, remaining fragile. Later, these unfired clay tablets could be soaked in water and recycled into new clean tablets. Other tablets, once written, were either deliberately fired in hot kilns , or inadvertently fired when buildings were burnt down by accident or during conflict, making them hard and durable. Collections of these clay documents made up the first archives. They were at

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1312-448: The tablet were carbon dated ) to before 4000 BCE, and possibly dating from as long ago as 5500 BCE, but their interpretation remains controversial because the tablets were fired in a furnace and the properties of the carbon changed accordingly. Fragments of tablets containing the Epic of Gilgamesh dating to 1800–1600 BCE have been discovered. A full version has been found on tablets dated to

1353-539: The trade of sheep, grain, and bread loaves, where transactions were recorded with clay tokens. These, initially very small clay tokens, were continually used all the way from the pre-historic Mesopotamia period, 9000 BCE, to the start of the historic period around 3000 BCE, when the use of writing for recording was widely adopted. The clay tablet was thus being used by scribes to record events happening during their time. Tools that these scribes used were styluses with sharp triangular tips, making it easy to leave markings on

1394-542: The useful properties of clay. Some of the earliest pottery shards recovered are from central Honshu , Japan . They are associated with the Jōmon culture, and recovered deposits have been dated to around 14,000 BCE. Cooking pots, art objects, dishware, smoking pipes , and even musical instruments such as the ocarina can all be shaped from clay before being fired. Ancient peoples in Mesopotamia adopted clay tablets as

1435-426: The water molecules are removed, and the plates hydrogen bond directly to each other, so that the dried clay is rigid but still fragile. If the clay is moistened again, it will once more become plastic. When the clay is fired to the earthenware stage, a dehydration reaction removes additional water from the clay, causing clay plates to irreversibly adhere to each other via stronger covalent bonding , which strengthens

1476-493: The world's population, in both traditional societies as well as developed countries, still live or work in buildings made with clay, often baked into brick, as an essential part of their load-bearing structure. Also a primary ingredient in many natural building techniques, clay is used to create adobe , cob , cordwood , and structures and building elements such as wattle and daub , clay plaster, clay render case, clay floors and clay paints and ceramic building material . Clay

1517-503: Was a way to get messages across just like mail. Important and private clay tablets were coated with an extra layer of clay, that no one else would read it. This means of communicating was used for over 3000 years in fifteen different languages. Sumerians, Babylonians and Eblaites all had their own clay tablet libraries. The Tărtăria tablets , the Danubian civilization , may be still older, having been dated by indirect method (bones found near

1558-489: Was granted urban-type settlement status. Kesova Gora's economy is primarily agriculture -based. There is also a bread-making factory, a linen factory, and a milk and meat packing company in the settlement. The main form of transportation in the settlement is the passenger train which makes a stop at the historic wooden town train station (constructed in 1895) two or more times a day. The train travels from nearby Sonkovo to Savyolovo , and back. A more frequent bus service

1599-522: Was not as we see it today. In Mesopotamia, writing began as simple counting marks, sometimes alongside a non-arbitrary sign, in the form of a simple image, pressed into clay tokens or less commonly cut into wood, stone or pots. In that way, the exact number of goods involved in a transaction could be recorded. This convention began when people developed agriculture and settled into permanent communities that were centered on increasingly large and organized trading marketplaces. These marketplaces were purposed for

1640-475: Was transformed into Tver Governorate . On October 3, 1927 Kashinsky Uyezd was abolished; Kesova Gora was transferred to Bezhetsky Uyezd. On July 12, 1929 the governorates and uyezds were abolished. Kesovsky District, with the administrative center in Kesova Gora, was established within Bezhetsk Okrug of Moscow Oblast . Shortly afterwards, the district was renamed Kesovogorsky. On July 23, 1930,

1681-461: Was used as a mortar in brick chimneys and stone walls where protected from water. Clay, relatively impermeable to water, is also used where natural seals are needed, such as in pond linings, the cores of dams , or as a barrier in landfills against toxic seepage (lining the landfill, preferably in combination with geotextiles ). Studies in the early 21st century have investigated clay's absorption capacities in various applications, such as

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