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British Regional Geology: The Pennines & adjacent areas (BGS:BRG8) British Regional Geology: Eastern England from the Tees to The Wash (BGS:BRG9) British Regional Geology: Central England (BGS:BRG10) Earp, J.R. & Hains, B.A. 1971 British Regional Geology: The Welsh Borderland (3rd edn), London, HMSO for British Geological Survey (BGS:BRG11)
San Andreas Fault System (Banning fault, Mission Creek fault, South Pass fault, San Jacinto fault, Elsinore fault) 1300: California, United States: Dextral strike-slip: Active: 1906 San Francisco (M7.7 to 8.25), 1989 Loma Prieta (M6.9) San Ramón Fault: Chile: Thrust fault: Sawtooth Fault: Idaho, United States: Normal fault: Seattle Fault ...
The British Geological Survey lists Snowdonia and the Lake District as having extremely large volcanic eruptions around 450 Ma (million years ago), Edinburgh Castle lying upon the remains of a volcano dating back 350 Ma, and some islands of western Scotland as being remnants of volcanoes from around 60 Ma. [1]
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.
In geology, a disturbance is a linear zone of disturbed rock strata stretching for many miles across country which comprises a combination of folding and faulting.The British Geological Survey record a number of such features in South Wales including the Neath Disturbance, Pontyclerc Disturbance, Carreg Cennen Disturbance and the Cribarth Disturbance, the latter sometimes also known (at least ...
It includes the Red Rock Fault, Bridgemere Fault and Wem Fault and reaches from Shropshire through eastern Cheshire to southeast Lancashire. [ 1 ] At Norbury Brook, Poynton , on the border of Cheshire and Greater Manchester , the Millstone Grit of the Pennines makes a 200 metres (660 ft) downfall to be covered to the west by the glacial tills ...
Variations in the strength of gravity occur from place to place according to the density distribution of the rocks beneath the surface. Such gravity anomalies have been mapped across the British Isles and adjacent areas [1] and they reveal aspects of these islands’ geological structure.
The early geological development of the Avalonia terrane, including England, is believed to have been in volcanic arcs near a subduction zone on the margin of the Gondwana continent. [2] Some material may have accreted from volcanic island arcs which formed further out in the ocean and later collided with Gondwana as a result of plate tectonic ...