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List Of Shear Zones Of Great Britain
This is a list of the named shear zones affecting the rocks of Great Britain and the Isle of Man. See the main article on shear for a fuller treatment of shear in rocks. Key to tables *Column 1 indicates the name of the shear zone. Note that different authors may use different names for the same shear zone or a section of it. *Column 2 indicates the OS grid reference of the approximate midpoint of certain shear zones. Note that the mapped extent of a shear zone may not accurately reflect its actual extent. *Column 3 indicates the country in which the shear zone occurs. *Column 4 indicates the county in which the shear zone occurs. Some traverse two or more counties of course. *Column 5 indicates on which sheet, if any, of the British Geological Survey's 1:50,000 / 1" scale geological map series of England and Wales (E&W) or of Scotland (Sc), the shear zone is shown and named (either on map/s or cross-section/s or both). A handful of BGS maps at other scales are listed too. *Column ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Britain
Great Britain is an island in the North Atlantic Ocean off the northwest coast of continental Europe. With an area of , it is the largest of the British Isles, the largest European island and the ninth-largest island in the world. It is dominated by a maritime climate with narrow temperature differences between seasons. The 60% smaller island of Ireland is to the west—these islands, along with over 1,000 smaller surrounding islands and named substantial rocks, form the British Isles archipelago. Connected to mainland Europe until 9,000 years ago by a landbridge now known as Doggerland, Great Britain has been inhabited by modern humans for around 30,000 years. In 2011, it had a population of about , making it the world's third-most-populous island after Java in Indonesia and Honshu in Japan. The term "Great Britain" is often used to refer to England, Scotland and Wales, including their component adjoining islands. Great Britain and Northern Ireland now constitute the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isle Of Man
) , anthem = "O Land of Our Birth" , image = Isle of Man by Sentinel-2.jpg , image_map = Europe-Isle_of_Man.svg , mapsize = , map_alt = Location of the Isle of Man in Europe , map_caption = Location of the Isle of Man (green) in Europe (dark grey) , subdivision_type = Sovereign state , subdivision_name = United Kingdom , established_title = Norse control , established_date = 9th century , established_title2 = Scottish control , established_date2 = 2 July 1266 , established_title3 = English control , established_date3 = 1399 , established_title4 = Revested into British Crown , established_date4 = 10 May 1765 , official_languages = , capital = Douglas , coordinates = , demonym = Manx; Manxman (plural, Manxmen); Manxwoman (plural, Manxwomen) , ethnic_groups = , ethnic_groups_year = 2021 , ethnic_groups_ref = Official census statistics provided by Statistics Isle of Man, Isle of Man Government: * * , religion = , religion_year = 2021 , relig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shear (geology)
Boudinaged quartz vein (with strain fringe) showing ''Fault (geology)">sinistral shear sense'', Starlight Pit, Fortnum Gold Mine, Western Australia In geology, shear is the response of a rock to deformation usually by compressive stress and forms particular textures. Shear can be homogeneous or non-homogeneous, and may be pure shear or simple shear. Study of geological shear is related to the study of structural geology, rock microstructure or rock texture and fault mechanics. The process of shearing occurs within brittle, brittle-ductile, and ductile rocks. Within purely brittle rocks, compressive stress results in fracturing and simple faulting. Rocks Rocks typical of shear zones include mylonite, cataclasite, S-tectonite and L-tectonite, pseudotachylite, certain breccias and highly foliated versions of the wall rocks. Shear zone A shear zone is a tabular to sheetlike, planar or curviplanar zone composed of rocks that are more highly strained than rocks adjacent to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Country
A country is a distinct part of the world, such as a state, nation, or other political entity. It may be a sovereign state or make up one part of a larger state. For example, the country of Japan is an independent, sovereign state, while the country of Wales is a component of a multi-part sovereign state, the United Kingdom. A country may be a historically sovereign area (such as Korea), a currently sovereign territory with a unified government (such as Senegal), or a non-sovereign geographic region associated with certain distinct political, ethnic, or cultural characteristics (such as the Basque Country). The definition and usage of the word "country" is flexible and has changed over time. ''The Economist'' wrote in 2010 that "any attempt to find a clear definition of a country soon runs into a thicket of exceptions and anomalies." Most sovereign states, but not all countries, are members of the United Nations. The largest country by area is Russia, while the smallest is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
County
A county is a geographic region of a country used for administrative or other purposesChambers Dictionary, L. Brookes (ed.), 2005, Chambers Harrap Publishers Ltd, Edinburgh in certain modern nations. The term is derived from the Old French denoting a jurisdiction under the sovereignty of a count (earl) or a viscount.The Oxford Dictionary of English Etymology, C. W. Onions (Ed.), 1966, Oxford University Press Literal equivalents in other languages, derived from the equivalent of "count", are now seldom used officially, including , , , , , , , and ''zhupa'' in Slavic languages; terms equivalent to commune/community are now often instead used. When the Normans conquered England, they brought the term with them. The Saxons had already established the districts that became the historic counties of England, calling them shires;Vision of Britai– Type details for ancient county. Retrieved 31 March 2012 many county names derive from the name of the county town (county seat) with t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Geological Survey
The British Geological Survey (BGS) is a partly publicly funded body which aims to advance geoscientific knowledge of the United Kingdom landmass and its continental shelf by means of systematic surveying, monitoring and research. The BGS headquarters are in Keyworth, Nottinghamshire, England. Its other centres are located in Edinburgh, Wallingford, Cardiff and London. The current motto of the BGS is: ''Gateway to the Earth''. History and previous names The Geological Survey was founded in 1835 by the Board of Ordnance as the Ordnance Geological Survey, under Henry De la Beche. This was the world's first national geological survey. It remained a branch of the Ordnance Survey for many years. In 1965, it was merged with the Geological Museum and Overseas Geological Surveys, under the name of Institute of Geological Sciences. On 1 January 1984, the institute was renamed the British Geological Survey (and often referred to as the BGS), a name still carried today. Competenc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laxford
Laxford is a remote area in the far Northwest Highlands of Scotland around the River Laxford which runs northwest from Loch Stack to Laxford Bay. This bay is an inlet of Loch Laxford, a sea loch and Special Area of Conservation. The river is well known for its salmon fly fishing, indeed the name "Laxford" derives from the Old Norse, Norse for "salmon fjord". The area is important geologically, being a region of shear (geology), shear in the Moine Thrust Belt, Moine Thrust. A road bridge, Laxford Bridge, crosses the river adjacent to the A838 road, A838 and A894 roads, the road junction making the spot well known to tourists. Laxford is in Sutherland, in the Highland (council area), Highland council area of Scotland; Scourie, away, is the nearest village. The area forms part of the North West Sutherland National Scenic Area, one of National scenic area (Scotland), 40 such areas in Scotland, which are defined so as to identify areas of exceptional scenery and to ensure its protect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Geological Faults Of Scotland
This is a list of the named geological faults in Scotland. See the main article on faults for a fuller treatment of fault types and nomenclature but in brief, the main types are normal faults, reverse faults, thrusts, thrust faults or slides and strike-slip faults. Many faults may have acted as both normal faults at one time and as reverse or thrust faults at another and may or may not have also incorporated some degree of strike-slip movement too. The terms 'zone' and 'complex' imply collections of features with associated histories. Key to tables *Column 1 indicates the name of the fault. Note that different authors may use different names for the same fault or a section of it. Conversely, the same name may be applied to more than one fault, particularly in the case of smaller faults which are widely separated. *Column 2 indicates the OS grid reference of the approximate midpoint of certain faults. Note that the mapped extent of a fault may not accurately reflect its actual ext ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Geological Faults Of Wales
This is a list of the named geological faults affecting the rocks of Wales. See the main article on faults for a fuller treatment of fault types and nomenclature but in brief, the main types are normal faults, reverse faults, thrusts or thrust faults and strike-slip faults. Many faults may have acted as both normal faults at one time and as reverse or thrust faults at another and may or may not have also incorporated some degree of strike-slip movement too. Fault zones, fault belts and fault complexes typically describe assemblages of faults which have a common origin and history and whose alignments tend to be sub-parallel to one another. There are also a number of 'disturbances', notably in South Wales. These linear features are a combination of faults and folds - the relative importance of faulting and folding varying along the length of each disturbance. Key to tables *Column 1 indicates the name of the fault. Note that different authors may use different names for the sa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Geological Folds In Great Britain
This is a list of the named geological folds affecting the rocks of Great Britain and the Isle of Man. Terminology See the main article on folds for a fuller treatment of fold types and nomenclature but in brief, an anticline is an arch-like fold whereas a syncline is its converse; a downfold. Antiforms, anticlinoria, synforms and synclinoria are variations on these. A monocline (or, rarely, a monoform) is a step-like fold, one limb of which is roughly horizontal. Both domes and periclines are anticlines in which the strata fall away about equally in all directions. There are also a number of ' disturbances' named in parts of the country, notably in South Wales. These linear features are a combination of faults and folds - the relative importance of faulting and folding varying along the length of each disturbance. List of folds Key to table *Column 1 indicates the name of the fold. Some variant spellings are recorded between sources. *Column 2 indicates the county in wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 than two billion years. This piece of the Earth's crust has experienced several episodes of mountain building or ' orogenies', each of which has added further complexity to the picture. A wide range of geological structures occur across Britain and include examples at a variety of scales of: * faults *thrust faults * folds *sedimentary basins * grabens ''and'' horsts *unconformities Our understanding of Britain's large-scale structure has been gained over many decades by simple geological field survey together with an increasing range of technological methods including gravity surveys, seismic surveys, aeromagnetic surveys and other forms of remote sensing. Terranes A useful approach to considering Britain's geological structure is to examine the various terranes from which it is composed. These are essentially continental fragments whose boundar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of Scotland
The geology of Scotland is unusually varied for a country of its size, with a large number of differing geological features.Keay & Keay (1994) page 415. There are three main geographical sub-divisions: the Highlands and Islands is a diverse area which lies to the north and west of the Highland Boundary Fault; the Central Lowlands is a rift valley mainly comprising Palaeozoic formations; and the Southern Uplands, which lie south of the Southern Uplands Fault, are largely composed of Silurian deposits. The existing bedrock includes very ancient Archean gneiss, metamorphic beds interspersed with granite intrusions created during the Caledonian mountain building period (the Caledonian orogeny), commercially important coal, oil and iron bearing carboniferous deposits and the remains of substantial Palaeogene volcanoes. During their formation, tectonic movements created climatic conditions ranging from polar to desert to tropical and a resultant diversity of fossil remains. Scotland h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
