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Mount's Bay
Mount's Bay ( kw, Baya an Garrek) is a large, sweeping bay on the English Channel coast of Cornwall, United Kingdom, stretching from the Lizard Point to Gwennap Head. In the north of the bay, near Marazion, is St Michael's Mount; the origin of name of the bay. In summer, it is a large, benign, scenic, natural harbour. However, in winter, onshore gales present maritime risks, particularly for sailing ships. There are more than 150 known wrecks from the nineteenth century in the area.Corin, J and Farr, G. (1983) ''Penlee Lifeboat''. Penzance: Penzance and Penlee Branch of the RNLI. The eastern side of the bay centred around Marazion and St Michael's Mount was designated as a Marine Conservation Zone in January 2016. Geography and geology Mount's Bay is the biggest bay in Cornwall. Its half-moon shape is similar to that of Donegal Bay in Ireland and Cardigan Bay in Wales, although, unlike the aforementioned bays, Mount's Bay is relatively sheltered from the prevailing Atlantic we ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mounts Bay
Mount's Bay or Mounts Bay may refer to: *Mount's Bay, Cornwall UK *Mounts Bay RFC, a defunct rugby club formerly based in Penzance *Mounts Bay Road, Perth, Western Australia *Mounts Bay, in the Swan River Estuary, Perth, see Swan River (Western Australia) The Swan River () is a river in the south west of Western Australia. The river runs through the metropolitan area of Perth, Western Australia's capital and largest city. Course of river The Swan River estuary flows through the city of Perth. ... * HMS ''Mounts Bay'' (K627), a Royal Navy ship * RFA ''Mounts Bay'' (L3008), a Royal Fleet auxiliary ship {{disambiguation, geo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greywacke
Greywacke or graywacke ( German ''grauwacke'', signifying a grey, earthy rock) is a variety of sandstone generally characterized by its hardness, dark color, and poorly sorted angular grains of quartz, feldspar, and small rock fragments or lithic fragments set in a compact, clay-fine matrix. It is a texturally immature sedimentary rock generally found in Paleozoic strata. The larger grains can be sand- to gravel-sized, and matrix materials generally constitute more than 15% of the rock by volume. The term "greywacke" can be confusing, since it can refer to either the immature (rock fragment) aspect of the rock or its fine-grained (clay) component. The origin of greywacke was unknown until turbidity currents and turbidites were understood, since, according to the normal laws of sedimentation, gravel, sand and mud should not be laid down together. Geologists now attribute its formation to submarine avalanches or strong turbidity currents. These actions churn sediment and ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prussia Cove
Prussia Cove ( kw, Porth Legh), formerly called King's Cove, is a small private estate on the coast of Mount's Bay and to the east of Cudden Point, west Cornwall, England, United Kingdom. Part of the area is designated as a Site of Special Scientific Interest (SSSI), a Geological Conservation Review site and is in an Area of Outstanding Natural Beauty (AONB). It consists of four small coves and several cottages and houses. The names of the coves from west to east are Piskies, Bessy's, King's and Coule's. The area is accessible by foot from the South West Coast Path The cove is known for the 18th-century ship-wrecker and smuggler John Carter, also known as the "King of Prussia". History Prussia Cove is known for the 18th-century ship- wrecker and smuggler John Carter (born 1738), also known as the "King of Prussia"; thought to be from a childhood game he played and the origin of the name for the area. Evidence of smuggling can be inferred by the building of the terrace of seven ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gabbro
Gabbro () is a phaneritic (coarse-grained), mafic intrusive igneous rock formed from the slow cooling of magnesium-rich and iron-rich magma into a holocrystalline mass deep beneath the Earth's surface. Slow-cooling, coarse-grained gabbro is chemically equivalent to rapid-cooling, fine-grained basalt. Much of the Earth's oceanic crust is made of gabbro, formed at mid-ocean ridges. Gabbro is also found as plutons associated with continental volcanism. Due to its variant nature, the term ''gabbro'' may be applied loosely to a wide range of intrusive rocks, many of which are merely "gabbroic". By rough analogy, gabbro is to basalt as granite is to rhyolite. Etymology The term "gabbro" was used in the 1760s to name a set of rock types that were found in the ophiolites of the Apennine Mountains in Italy. It was named after Gabbro, a hamlet near Rosignano Marittimo in Tuscany. Then, in 1809, the German geologist Christian Leopold von Buch used the term more restrictively in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dolerite
Diabase (), also called dolerite () or microgabbro, is a mafic, holocrystalline, subvolcanic rock equivalent to volcanic basalt or plutonic gabbro. Diabase dikes and sills are typically shallow intrusive bodies and often exhibit fine-grained to aphanitic chilled margins which may contain tachylite (dark mafic glass). ''Diabase'' is the preferred name in North America, while ''dolerite'' is the preferred name in the rest of the English-speaking world, where sometimes the name ''diabase'' refers to altered dolerites and basalts. Some geologists prefer to avoid confusion by using the name ''microgabbro''. The name ''diabase'' comes from the French ', and ultimately from the Greek - meaning "act of crossing over, transition". Petrography Diabase normally has a fine but visible texture of euhedral lath-shaped plagioclase crystals (62%) set in a finer matrix of clinopyroxene, typically augite (20–29%), with minor olivine (3% up to 12% in olivine diabase), magnetite (2%), and i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Camborne School Of Mines
The Camborne School of Mines ( kw, Scoll Balow Cambron), commonly abbreviated to CSM, was founded in 1888. Its research and teaching is related to the understanding and management of the Earth's natural processes, resources and the environment. It has undergraduate, postgraduate and research degree programmes within the Earth resources, civil engineering and environmental sectors. CSM is located at the Penryn Campus, near Falmouth, Cornwall, UK. The school merged with the University of Exeter in 1993. Reputation The Camborne School of Mines has an international reputation in mining, tunnelling, mineralogy, mineral economics, geology, geophysics and geochemistry. CSM's international reputation dates back to the 19th century when with new deposits found around the world CSM graduates began to seek employment overseas and by the 20th century, graduates were in most of the world's major mining areas such as Southern Africa, Western Africa, Malaysia, Australia, South America, Mex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Praa Sands
Praa Sands ( kw, Poll an Wragh), (formerly Prah Sands) commonly pronounced pray or prah, is a white-sand beach and coastal village in Cornwall, England. It is in the parish of Breage and lies off the A394 road between Helston and Penzance. Formerly serving the local mining industry, it is now mostly a tourist-orientated area. The beach is popular with surfers and walkers. Towards the south eastern end of the beach is a WW2 Type 24 pillbox. Originally this was constructed on top of the cliffs but it has been subjected to coastal erosion and has settled down onto the beach. Geography Praa Sands is situated in a sheltered indentation within Mount's Bay; it has a long, wide, sandy, south-facing beach that is lapped by large waves for the area. The beach, which has shallow water and is guarded by seasonal lifeguards, attracts surfers and holidaymakers. Adjacent to the beach are retail outlets serving the holidaymaker. Praa Sands lies within the Cornwall Area of Outstanding Natura ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Periglacial
Periglaciation (adjective: "periglacial", also referring to places at the edges of glacial areas) describes geomorphic processes that result from seasonal thawing of snow in areas of permafrost, the runoff from which refreezes in ice wedges and other structures. "Periglacial" suggests an environment located on the margin of past glaciers. However, freeze and thaw cycles influence landscapes outside areas of past glaciation. Therefore, periglacial environments are anywhere that freezing and thawing modify the landscape in a significant manner. Tundra is a common ecological community in periglacial areas. History Periglaciation became a distinct subject within the study of geology after Walery Łoziński, a Polish geologist, introduced the term in 1909. Łoziński drew upon the early work of Johan Gunnar Andersson. According to Alfred Jahn, his introduction of his work at the 1910 International Geological Congress held in Stockholm caused significant discussion. In the field tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleistocene
The Pleistocene ( , often referred to as the '' Ice age'') is the geological epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was finally confirmed in 2009 by the International Union of Geological Sciences, the cutoff of the Pleistocene and the preceding Pliocene was regarded as being 1.806 million years Before Present (BP). Publications from earlier years may use either definition of the period. The end of the Pleistocene corresponds with the end of the last glacial period and also with the end of the Paleolithic age used in archaeology. The name is a combination of Ancient Greek grc, label=none, πλεῖστος, pleīstos, most and grc, label=none, καινός, kainós (latinized as ), 'new'. At the end of the preceding Pliocene, the previously isolated North and South American continents were joined by the Isthmus of Panama, causing a faunal interchange between the t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rinsey
Rinsey ( kw, Rynnji) is a hamlet in Cornwall, England, United Kingdom. It is located off the main A394 road between Helston and Penzance in the civil parish of Breage. The nearby hamlet of Rinsey Croft is located 1 km to the north-east.Ordnance Survey: Landranger map sheet 203 ''Land's End'' The nearby cliffs and beach are owned and managed by the National Trust and part of Rinsey East Cliff is designated as the Porthcew Site of Special Scientific Interest (SSSI) for its geological interest. The South West Coast Path passes through the property. Rinsey lies within the Cornwall Area of Outstanding Natural Beauty (AONB). The name ''Rinsey'' is an anglicisation of the Cornish language ''Rynnji'', which contains the words ''rynn'' 'point of land' (as in Penryn), and ''chi'' 'house'. History Rinsey, in the Hundred of Kerrier, is mentioned in the Domesday Book as one of four manors in the parish of Breage, under the name of 'Rentis'. The population in 1086 was 9.5 household ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Granite
Granite () is a coarse-grained ( phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies underground. It is common in the continental crust of Earth, where it is found in igneous intrusions. These range in size from dikes only a few centimeters across to batholiths exposed over hundreds of square kilometers. Granite is typical of a larger family of ''granitic rocks'', or '' granitoids'', that are composed mostly of coarse-grained quartz and feldspars in varying proportions. These rocks are classified by the relative percentages of quartz, alkali feldspar, and plagioclase (the QAPF classification), with true granite representing granitic rocks rich in quartz and alkali feldspar. Most granitic rocks also contain mica or amphibole minerals, though a few (known as leucogranites) contain almost no dark minerals. Granite is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slate
Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism. It is the finest grained foliated metamorphic rock. Foliation may not correspond to the original sedimentary layering, but instead is in planes perpendicular to the direction of metamorphic compression. The foliation in slate is called " slaty cleavage". It is caused by strong compression causing fine grained clay flakes to regrow in planes perpendicular to the compression. When expertly "cut" by striking parallel to the foliation, with a specialized tool in the quarry, many slates will display a property called fissility, forming smooth flat sheets of stone which have long been used for roofing, floor tiles, and other purposes. Slate is frequently grey in color, especially when seen, en masse, covering roofs. However, slate occurs in a variety of colors even from a single locality; f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
