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Dent Fault
The Dent Fault is a major fault zone on the boundary between the counties of Cumbria and North Yorkshire in northern England. It is named after the village of Dent in Dentdale, on the western margin of the Yorkshire Dales. The fault, or rather the 'Dent Fault System' – a collection of closely associated faults and folds, defines the western edge of the Askrigg Block, a geological structure that underlies the Yorkshire Dales. The fault is associated with the Taythes Anticline to its west and the Fell End Syncline to its east. Other than vertical movement on the fault, there has also been an element of strike-slip movement. To the north, the fault links with the Pennine Fault System in the vicinity of Brough and with the Craven Fault System near Kirkby Lonsdale to the south.Stone et al. 2010 ''British Regional Geology: Northern England'' (5th edition) Keyworth, Notts, British Geological Survey Regional setting The Carboniferous geology of northern England consists of a series ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Dent Fault - Geograph
''The'' () is a grammatical article in English, denoting persons or things already mentioned, under discussion, implied or otherwise presumed familiar to listeners, readers, or speakers. It is the definite article in English. ''The'' is the most frequently used word in the English language; studies and analyses of texts have found it to account for seven percent of all printed English-language words. It is derived from gendered articles in Old English which combined in Middle English and now has a single form used with pronouns of any gender. The word can be used with both singular and plural nouns, and with a noun that starts with any letter. This is different from many other languages, which have different forms of the definite article for different genders or numbers. Pronunciation In most dialects, "the" is pronounced as (with the voiced dental fricative followed by a schwa) when followed by a consonant sound, and as (homophone of pronoun '' thee'') when followed by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Craven Fault System
The Craven Fault System is the name applied by geologists to the group of crustal faults in the Pennines that form the southern edge of the Askrigg Block and which partly bounds the Craven Basin. Sections of the system's component faults which include the North, Middle and South Craven faults and the Feizor FaultBritish Geological Survey 1:50,000 scale geological map (England and Wales) sheet 60 ''Settle'' are evident at the surface in the form of degraded faults scarps where Carboniferous Limestone abuts millstone grit. The fault system is approximately coincident with the southwestern edge of the Yorkshire Dales National Park and the northeastern edge of the Bowland Fells. Location The Craven Faults are major crustal fractures across the Pennines. These faults constitute a zone crossing the backbone of England from west to east commencing near Leck, Lancashire at then branching three ways: * The North Craven Fault extends about to . * The Mid Craven Fault extends about ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of The Pennines
Geology () is a branch of natural science concerned with Earth and other astronomical objects, the features or rocks of which it is composed, and the processes by which they change over time. Modern geology significantly overlaps all other Earth sciences, including hydrology, and so is treated as one major aspect of integrated 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. It also provides tools to determine the relative and absolute ages of rocks found in a given location, and also to describe the histories of those rocks. By combining these tools, geologists are able to chronicle the geological history of the Earth as a whole, and also to demonstrate the age of the Earth. Geology provides the primary evidence for plate tectonics, the evolutionary history of life, and the Earth's past climates. Geologists broadly study the properties and processes of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monocline
A monocline (or, rarely, a monoform) is a step-like fold in rock strata consisting of a zone of steeper dip within an otherwise horizontal or gently-dipping sequence. Formation Monoclines may be formed in several different ways (see diagram) * By differential compaction over an underlying structure, particularly a large fault at the edge of a basin due to the greater compactibility of the basin fill, the amplitude of the fold will die out gradually upwards. * By mild reactivation of an earlier extensional fault during a phase of inversion causing folding in the overlying sequence. * As a form of fault propagation fold during upward propagation of an extensional fault in basement into an overlying cover sequence. * As a form of fault propagation fold during upward propagation of a reverse fault in basement into an overlying cover sequence. Examples * Waterpocket Fold in Capitol Reef National Park, Utah *Comb Ridge in southern Utah * Grandview-Phantom Monocline in Grand Can ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inversion (geology)
In structural geology inversion or basin inversion relates to the relative uplift of a sedimentary basin or similar structure as a result of crustal shortening. This normally excludes uplift developed in the footwalls of later extensional faults, or uplift caused by mantle plumes. "Inversion" can also refer to individual faults, where an extensional fault is reactivated in the opposite direction to its original movement. The term ''negative inversion'' is also occasionally used to describe the reactivation of reverse faults and thrusts during extension. The term "inversion" simply refers to the fact that a relatively low-lying area is uplifted – the rock sequence itself is not normally inverted. Formation Many inversion structures are caused by the direct reactivation of pre-existing extensional faults. In some cases only the deeper parts of the fault are reactivated and the shortening is accommodated over a much broader area in the shallow part of the section. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Continental Collision
In geology, continental collision is a phenomenon of plate tectonics that occurs at convergent boundaries. Continental collision is a variation on the fundamental process of subduction, whereby the subduction zone is destroyed, mountains produced, and two continents sutured together. Continental collision is only known to occur on Earth. Continental collision is not an instantaneous event, but may take several tens of millions of years before the faulting and folding caused by collisions stops. The collision between India and Asia has been going on for about 50 million years already and shows no signs of abating. Collision between East and West Gondwana to form the East African Orogen took about 100 million years from beginning (610 Ma) to end (510 Ma). The collision between Gondwana and Laurasia to form Pangea occurred in a relatively brief interval, about 50 million years long. Subduction zone: the collision site The process begins as two conti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Avalonia
Avalonia was a microcontinent in the Paleozoic era. Crustal fragments of this former microcontinent underlie south-west Great Britain, southern Ireland, and the eastern coast of North America. It is the source of many of the older rocks of Western Europe, Atlantic Canada, and parts of the coastal United States. Avalonia is named for the Avalon Peninsula in Newfoundland. Avalonia developed as a volcanic arc on the northern margin of Gondwana. It eventually rifted off, becoming a drifting microcontinent. The Rheic Ocean formed behind it, and the Iapetus Ocean shrank in front. It collided with the continents Baltica, then Laurentia, and finally with Gondwana, ending up in the interior of Pangea. When Pangea broke up, Avalonia's remains were divided by the rift which became the Atlantic Ocean. Extent When the term "Avalon" was first coined by Canadian geologist Harold Williams in 1964, he included only Precambrian rocks in eastern Newfoundland. More than a decade later he ext ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subduction
Subduction is a geological process in which the oceanic lithosphere is recycled into the Earth's mantle at convergent boundaries. Where the oceanic lithosphere of a tectonic plate converges with the less dense lithosphere of a second plate, the heavier plate dives beneath the second plate and sinks into the mantle. A region where this process occurs is known as a subduction zone, and its surface expression is known as an arc-trench complex. The process of subduction has created most of the Earth's continental crust. Rates of subduction are typically measured in centimeters per year, with the average rate of convergence being approximately two to eight centimeters per year along most plate boundaries. Subduction is possible because the cold oceanic lithosphere is slightly denser than the underlying asthenosphere, the hot, ductile layer in the upper mantle underlying the cold, rigid lithosphere. Once initiated, stable subduction is driven mostly by the negative buoyancy of the de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Back-arc Spreading
A back-arc basin is a type of geologic basin, found at some convergent plate boundaries. Presently all back-arc basins are submarine features associated with island arcs and subduction zones, with many found in the western Pacific Ocean. Most of them result from tensional forces, caused by a process known as oceanic trench rollback, where a subduction zone moves towards the subducting plate. Back-arc basins were initially an unexpected phenomenon in plate tectonics, as convergent boundaries were expected to universally be zones of compression. However, in 1970, Dan Karig published a model of back-arc basins consistent with plate tectonics. Structural characteristics Back-arc basins are typically very long and relatively narrow, often thousands of kilometers long while only being a few hundred kilometers wide at most. For back-arc extension to form, a subduction zone is required, but not all subduction zones have a back-arc extension feature. Back-arc basins are found in are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gainsborough Trough
Gainsborough or Gainsboro may refer to: Places * Gainsborough, Ipswich, Suffolk, England ** Gainsborough Ward, Ipswich * Gainsborough, Lincolnshire, a town in England ** Gainsborough (UK Parliament constituency) * Gainsborough, New South Wales, Australia * Gainsborough, Saskatchewan, Canada * Gainsboro, Roanoke, Virginia * Gainesboro, Tennessee * Gainesboro, Virginia People * Aerith Gainsborough, a fictional character from ''Final Fantasy VII'' * Earl of Gainsborough, a title in the peerage of England and the peerage of the United Kingdom * Humphrey Gainsborough (1718–1776), English minister and engineer * Thomas Gainsborough (1727–1788), English painter * William Gainsborough (died 1307), Bishop of Winchester Other * Gainsborough (crater), on the planet Mercury * Gainsborough (horse), the 1918 Triple Crown Champion of English Thoroughbred Racing * HMS ''Gainsborough'', two ships of the Royal Navy * Gainsborough Pictures, a London-based film studio, active between 1924 an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stainmore Trough
Stainmore is a remote geographic area in the Pennines on the border of Cumbria, County Durham and North Yorkshire. The name is used for a civil parish in the Eden District of Cumbria, England, including the villages of North Stainmore and South Stainmore. The parish had a population of 253 in the 2001 census, increasing to 264 at the Census 2011. Stainmore Forest stretches further east into County Durham, towards Bowes. Geography Stainmore is drained by the River Belah and the River Balder. It is crossed by the Roman road from Bowes to Brough, now part of the A66, and formerly by the Stainmore Railway. Each of these lines of communication has made use of the relatively low broad saddle between the higher hills to north and south which is commonly referred to as the Stainmore Gap. The summit of the former railway is around above sea level, though the roads climb to slightly higher elevations. The Gap is coincident with the Stainmore Summit Fault which throws the relatively ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alston Block
The Alston Block is a term used by geologists to describe the geological structure of the North Pennines of northern England and which forms a part of the Pennine Block & Basin Province which originated during the Carboniferous period. It is defined by the Stublick and Ninety Fathom faults to the north, the Pennine Fault to the west and the Stainmore Trough to the south. It is in essence a horst underlain by the Weardale Granite which provides sufficient buoyancy to maintain this piece of the upper crust as an area of raised relief. To its west lies the Vale of Eden and to its north is the half-graben of the Northumberland Trough.British Geological Survey. 1996, ''Tectonic Map of Britain, Ireland & adjacent areas'', Pharaoh et al. 1:1500 000 (Keyworth, BGS) The area is also known for its mineral wealth. See also Geological Structure of Great Britain The geological structure of Great Britain is complex, resulting as it does from a long and varied geological history spanning ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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