How To Use Craton In A Sentence
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Together the shield and platform form what geologists call a craton.
Formation of the Earth's crust
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The low-velocity zone occurs almost everywhere, except perhaps under cratonic areas.
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In the Western zone and the contiguous Hooper Complex, turbiditic quartz wacke was deposited on the Kimberley Craton between c. 1872 and 1865 Ma.
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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 greenstones of the Kaapvaal craton in the northeast have been found to contain unicellular and biogenic filamentous structures, signs of some of the earliest forms of life.
Nama Karoo
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A craton includes a crystalline basement of commonly Precambrian rock called a shield, and a platform in which flat-lying or nearly flat-lying sediments or sedimentary rock surround the shield.
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Fipke also knew that the craton underneath the pipes he had found ran all the way up the Rockies.
How a Rogue Geologist Discovered a Diamond Trove in the Canadian Arctic
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Scotland lies on ancient continental crust known as the Hebridean craton.
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If the craton has diamonds in it, the result is either a carrot-shaped, diamond-studded pipe reaching up to the surface or a wide, flat underground structure called a dike.
How a Rogue Geologist Discovered a Diamond Trove in the Canadian Arctic
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The continents of Australia, North America, South America, and Africa each have a single continuous craton forming their nucleus.
Physiography of the Earth's terrestrial surface
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We suggest that the shallow epicratonic platform area of the Canadian Shield may have served as a refugium for relatively archaic taxa.
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These field and platform areas together constitute a huge European Craton.
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The platform and the basement rock together form a craton.
Physiography of the Earth's terrestrial surface
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Craton is apparently not alone in thinking the choppers chopped far too much wood.
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The majority of the Manx Group comprises mature cratonic detritus typical of a passive margin.
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Mobile belts of various ages seem to have stitched Africa's Archean cratons together by Himalayan-style continental collisions.
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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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Diamond is obtained from volcanic pipes composed of kimberlite or lamproite, rocks that are found only in cratons, very old stable areas of the Earth's crust.
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Geologic correlation of the Himalayan orogen and Indian craton: Part 2.
EurekAlert! - Breaking News
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Although continents were small, they consisted of stable cratons.
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The Zimbabwe craton consists of 23 greenstone belts surrounded by felsic gneisses and granites, with ages from 3.6 Ga to 2.6 Ga.
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Geologic correlation of the Himalayan orogen and Indian craton: Part 1.
EurekAlert! - Breaking News
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The three named genera of the family are apparently endemic to the southwestern North American craton.
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With two thirds of the country covered with the craton-type soil, in which the kimberlite stone which bears diamonds can be found, there has been a steady increase in diamond prospecting.
ANC Daily News Briefing
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A craton includes a crystalline basement of commonly Precambrian rock called a shield, and a platform in which flat-lying or nearly flat-lying sediments or sedimentary rock surround the shield.
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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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The petrogenesis of igneous rocks in the Albany-Fraser Province is not well constrained, although U-Pb zircon geochronology establishes that most granitic protoliths were not tectonically reworked Yilgarn Craton.
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Corals, conodonts, bivalves, brachiopods and cephalopods have comparable intracratonic distribution patterns.
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The currently accepted name for this part of the craton is the Murehwa batholith.
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The craton of North America has been relatively stable for about 600 million years.
Physiography of the Earth's terrestrial surface
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Kimberlite pipes are created when magma bubbles up through a craton, expanding and cooling on its way up.
How a Rogue Geologist Discovered a Diamond Trove in the Canadian Arctic
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Second, the timing of amalgamation of the Central Zone to either of the adjacent marginal zones and/or cratons is more unclear than ever.
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Many workers have interpreted the Zimbabwe craton as vertically accreted crust.
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But Fipke knew that, 100 miles under those pipes, was a craton, a thick, old chunk of continental plate where diamonds form.
How a Rogue Geologist Discovered a Diamond Trove in the Canadian Arctic
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Corals, conodonts, bivalves, brachiopods and cephalopods have comparable intracratonic distribution patterns.
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These rocks are also of biogeographic interest because unlike truly allochthonous terranes they are parautochthonous with respect to the craton.
