The Cimmerian islands, the present Turkey, Iran and Tibet, broke completely free of the Australian craton and moved rapidly to the north. |
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A well-known older astrobleme situated in the margin of the Mesoprotozoic Superior craton provides a good example of meteorite fall. |
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The basin is separated from the craton by a major tectonic flexure known as the Redstone arch. |
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Much of the craton remained stable up to Triassic time, with sedimentary sequences dominated by shallow-water and subaerial sediments. |
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Many workers have interpreted the Zimbabwe craton as vertically accreted crust. |
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However, this mode of emplacement is contradictory to well-established ideas for Archaean granites in the Zimbabwe craton. |
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The currently accepted name for this part of the craton is the Murehwa batholith. |
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The three named genera of the family are apparently endemic to the southwestern North American craton. |
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The term craton has been used for many years for the broad central parts of continents that are affected only by epeirogenic movements. |
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These rocks are also of biogeographic interest because unlike truly allochthonous terranes they are parautochthonous with respect to the craton. |
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To the east of Laurentia, the Siberian craton was positioned just south of the paleoequator between Laurentia and the western coast of Gondwana. |
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A large area of northern and central Canada is underlain by a huge craton, which forms the nucleus of the North American continent. |
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A dark blue colour is introduced to highlight lower Paleozoic offshelf units in the Phanerozoic orogens surrounding the Precambrian craton. |
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In Canada, the continental landmass covers one of the greatest extents of Archean craton in the world. |
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The Archaean to Proterozoic Lewisian complex, exposed along and in the Moine Thrust Zone, represents the last stages of the growth and reworking of the Hebridean craton. |
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Basal sands deposited on a granitic-gneissic craton also are usually arkosic. |
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Scotland lies on ancient continental crust known as the Hebridean craton. |
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She has been collaborating Edith Martel of NWT Geoscience Office and Ken Ashton and Colin Card of Saskatchewan Energy and Mines on the first modern compilation of the Rae craton of the Churchill Province. |
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The cratons are, from south to north, the Kalahari craton, Congo craton, Tanzania craton and West African craton. |
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The highly radiogenic character of the sulphides is due to the radioactively enriched nature of the upper crust necessitating the modelling of craton specific lead isotope evolution curves for the São Francisco Craton. |
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A sequence of Precambrian events in Singbhum craton, deformational history of North Singbhum mobile belt and kinematic history of Singbhum shear zone provided an overview of cratonic geology. |
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The thermal structure beneath the cratonic regions of the Indian shield indicates varying lithospheric thickness from 65 km in the Singhbhum craton to 48 km in the Archaean Dharwar craton. |
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As Lake Bosumtwi is actually a lake filling an impact crater, several holes were drilled through the sediment into the underlying, 2.2 billion year-old rocks of the West African craton. |
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Laurentia, a craton primarily made up of present-day North America and Greenland, was rotated 90° clockwise from its present orientation and sat astride the paleoequator during Cambrian times. |
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They were deposited in deepwater sedimentary wedges next to the Permian continental shelf margin at the western edge of the North American craton. |
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Hence, one aim of the bedrock geology activity is to re-compile the bedrock of the craton and surrounding belts, taking full advantage of new data and digital methodologies. |
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Supercontinents, largely in evidence earlier in the geological record, are landmasses that comprise more than one craton or continental core. |
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There are many microcontinents, or continental fragments, that are built of continental crust but do not contain a craton. |
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The interior of the main continental landmass includes an extensive granitic core called a craton. |
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The research team measured the amount of water in mantle xenoliths that had been naturally exhumed from the base of South Africa's Kaapvaal craton during a kimberlite eruption. |
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Although cratons are not tectonically active, they can be located near active margins, such as the Brazilian craton at the rear of the Andean active margin. |
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Along most of the edges of this craton are fragments of crustal material called terranes, accreted to the craton by tectonic actions over the long span of geologic time. |
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Craton is apparently not alone in thinking the choppers chopped far too much wood. |
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The Baltic Shield is defined as the exposed Precambrian northwest segment of the East European Craton. |
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