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Frosterley Marble
Frosterley Marble is a black, bituminous coraliferous limestone containing fossil crinoids of the Lower Carboniferous (Mississippian ), some 325 million years ago. It outcrops in Weardale, County Durham, England, including near the village of Frosterley whence it is named. Geology Unlike a true marble, it is not a metamorphic rock, but is so-called because it can take a fine polish. Concentrations of such corals as '' Dibunophyllum bipartitum'' and of brachiopod remains contribute to its attractiveness when sections are polished. Use It is cut and polished for use as ornate stone, and was much desired for church decoration, particularly during the Middle Ages. The decorative columns found in Durham Cathedral Durham Cathedral, formally the , is a Church of England cathedral in the city of Durham, England. The cathedral is the seat of the bishop of Durham and is the Mother Church#Cathedral, mother church of the diocese of Durham. It also contains the ... date from about ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frosterley Marble Detail
Frosterley is a village in the civil parish of Stanhope, in County Durham, England. It is situated in Weardale, on the River Wear close to its confluence with Bollihope Burn; between Wolsingham and Stanhope; west of Durham City and southwest of Newcastle upon Tyne. In the 2001 census Frosterley had a population of 705. Frosterley is on the Weardale Railway. Heritage trains currently run to Stanhope, Wolsingham and Witton-le-Wear. History The area has been inhabited since Mesolithic times: Mesolithic flints and Neolithic stones axes have been found in the vicinity. A bronze spearhead was found in a local quarry dating to the late Bronze Age . The village itself has medieval origins, and although the original houses have long been replaced, the village still retains its medieval pattern. On the north of the village are the remains of St Botolph’s Chapel. What remains is an earthwork mound surrounded by a modern housing estate (Kirk Rise). The site was excavated in 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carboniferous Geology
The Carboniferous ( ) is a geologic period and system of the Paleozoic era that spans 60 million years, from the end of the Devonian Period Ma (million years ago) to the beginning of the Permian Period, Ma. It is the fifth and penultimate period of the Paleozoic era and the fifth period of the Phanerozoic eon. In North America, the Carboniferous is often treated as two separate geological periods, the earlier Mississippian and the later Pennsylvanian. The name ''Carboniferous'' means "coal-bearing", from the Latin ("coal") and ("bear, carry"), and refers to 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 (tetrapodomor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limestone
Limestone is a type of carbonate rock, carbonate sedimentary rock which is the main source of the material Lime (material), lime. It is composed mostly of the minerals calcite and aragonite, which are different Polymorphism (materials science), crystal forms of calcium carbonate . Limestone forms when these minerals Precipitation (chemistry), precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life. About 20% to 25% of sedimentary rock is carbonate rock, and most of this is limestone. The remaining carbonate rock is mostly Dolomite (rock), dolomite, a closely related rock, which contains a high percentage of the mineral Dolomite (mine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology
Geology (). is a branch of natural science concerned with the Earth and other astronomical objects, the rocks of which they are composed, and the processes by which they change over time. Modern geology significantly overlaps all other Earth sciences, including hydrology. It is integrated with Earth system science and planetary science. Geology describes the structure of the Earth on and beneath its surface and the processes that have shaped that structure. Geologists study the mineralogical composition of rocks in order to get insight into their history of formation. Geology determines the relative ages of rocks found at a given location; geochemistry (a branch of geology) determines their absolute ages. By combining various petrological, crystallographic, and paleontological tools, geologists are able to chronicle the geological history of the Earth as a whole. One aspect is to demonstrate the age of the Earth. Geology provides evidence for plate tectonics, the ev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of County Durham
: ''This article describes the geology of the ceremonial county of Durham. It includes the boroughs of Darlington, Hartlepool and Stockton-on-Tees but not those former northeastern parts of the county which are now in the county of Tyne and Wear.'' The geology of County Durham in northeast England consists of a basement of Lower Palaeozoic rocks overlain by a varying thickness of Carboniferous and Permo-Triassic sedimentary rocks which dip generally eastwards towards the North Sea. These have been intruded by a pluton, sills and dykes at various times from the Devonian Period to the Palaeogene. The whole is overlain by a suite of unconsolidated deposits of Quaternary age arising from glaciation and from other processes operating during the post-glacial period to the present. The geological interest of the west of the county was recognised by the designation in 2003 of the North Pennines Area of Outstanding Natural Beauty as a European Geopark. The word 'geology' may be traced b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Durham Cathedral
Durham Cathedral, formally the , is a Church of England cathedral in the city of Durham, England. The cathedral is the seat of the bishop of Durham and is the Mother Church#Cathedral, mother church of the diocese of Durham. It also contains the shrines of the Anglo-Saxons, Anglo-Saxon saints Cuthbert and Bede. There are daily Church of England services at the cathedral, and it received 727,367 visitors in 2019. It is a grade I listed building and forms part of the Durham Castle and Cathedral World Heritage Site. The cathedral is the successor to the Anglo-Saxon Lindisfarne Priory, which was established but abandoned in 875 in the face of Viking Age, Viking raids. The monks settled at Chester-le-Street from 882 until 995, when they moved to Durham. The cathedral remained a monastery until it was Dissolution of the monasteries, dissolved in 1541, since when it has been governed by a Dean of Durham, dean and Chapter (religion), chapter. The cathedral precinct formed part of Durham ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brachiopod
Brachiopods (), phylum (biology), phylum Brachiopoda, are a phylum of animals that have hard "valves" (shells) on the upper and lower surfaces, unlike the left and right arrangement in bivalve molluscs. Brachiopod valves are hinged at the rear end, while the front can be opened for feeding or closed for protection. Two major categories are traditionally recognized, articulate and inarticulate brachiopods. The word "articulate" is used to describe the tooth-and-groove structures of the valve-hinge which is present in the articulate group, and absent from the inarticulate group. This is the leading diagnostic skeletal feature, by which the two main groups can be readily distinguished as fossils. Articulate brachiopods have toothed hinges and simple, vertically oriented opening and closing muscles. Conversely, inarticulate brachiopods have weak, untoothed hinges and a more complex system of vertical and oblique (diagonal) muscles used to keep the two valves aligned. In many brachio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metamorphic Rock
Metamorphic rocks arise from the transformation of existing rock to new types of rock in a process called metamorphism. The original rock ( protolith) is subjected to temperatures greater than and, often, elevated pressure of or more, causing profound physical or chemical changes. During this process, the rock remains mostly in the solid state, but gradually recrystallizes to a new texture or mineral composition. The protolith may be an igneous, sedimentary, or existing metamorphic rock. Metamorphic rocks make up a large part of the Earth's crust and form 12% of the Earth's land surface. They are classified by their protolith, their chemical and mineral makeup, and their texture. They may be formed simply by being deeply buried beneath the Earth's surface, where they are subject to high temperatures and the great pressure of the rock layers above. They can also form from tectonic processes such as continental collisions, which cause horizontal pressure, friction, and dist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bitumen
Bitumen ( , ) is an immensely viscosity, viscous constituent of petroleum. Depending on its exact composition, it can be a sticky, black liquid or an apparently solid mass that behaves as a liquid over very large time scales. In American English, the material is commonly referred to as asphalt or tar. Whether found in natural deposits or refined from petroleum, the substance is classed as a pitch (resin), pitch. Prior to the 20th century, the term asphaltum was in general use. The word derives from the Ancient Greek word (), which referred to natural bitumen or pitch. The largest natural deposit of bitumen in the world is the Pitch Lake of southwest Trinidad, which is estimated to contain 10 million tons. About 70% of annual bitumen production is destined for road surface, road construction, its primary use. In this application, bitumen is used to bind construction aggregate, aggregate particles like gravel and forms a substance referred to as asphalt concrete, which is collo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marble
Marble is a metamorphic rock consisting of carbonate minerals (most commonly calcite (CaCO3) or Dolomite (mineral), dolomite (CaMg(CO3)2) that have recrystallized under the influence of heat and pressure. It has a crystalline texture, and is typically not Foliation (geology), foliated (Layered intrusion, layered), although there are exceptions. In geology, the term ''marble'' refers to metamorphosed limestone, but its use in stonemasonry more broadly encompasses unmetamorphosed limestone. The extraction of marble is performed by quarrying. Marble production is dominated by four countries: China, Italy, India and Spain, which account for almost half of world production of marble and decorative stone. Because of its high hardness and strong wear resistance, and because it will not be deformed by temperature, marble is often used in Marble sculpture, sculpture and construction. Etymology The word "marble" derives from the Ancient Greek (), from (), "crystalline rock, shin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frosterley
Frosterley is a village in the civil parish of Stanhope, in County Durham, England. It is situated in Weardale, on the River Wear close to its confluence with Bollihope Burn; between Wolsingham and Stanhope; west of Durham City and southwest of Newcastle upon Tyne. In the 2001 census Frosterley had a population of 705. Frosterley is on the Weardale Railway. Heritage trains currently run to Stanhope, Wolsingham and Witton-le-Wear. History The area has been inhabited since Mesolithic times: Mesolithic flints and Neolithic stones axes have been found in the vicinity. A bronze spearhead was found in a local quarry dating to the late Bronze Age . The village itself has medieval origins, and although the original houses have long been replaced, the village still retains its medieval pattern. On the north of the village are the remains of St Botolph’s Chapel. What remains is an earthwork mound surrounded by a modern housing estate (Kirk Rise). The site was excavated in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
