Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Plural form of
craton .
Etymologies
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Examples
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These old floating pieces of the lithosphere, called cratons, apparently stopped growing about 2 billion years ago as the Earth cooled, though within the last 500 million years, and perhaps for as long as 1 billion years, the modern era of plate tectonics has added new margins to the original cratons, slowly expanding the continents.
PhysOrg.com - latest science and technology news stories 2010
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These old floating pieces of the lithosphere, called cratons, apparently stopped growing about 2 billion years ago as the Earth cooled, though within the last 500 million years, and perhaps for as long as 1 billion years, the modern era of plate tectonics has added new margins to the original cratons, slowly expanding the continents.
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These places are not on old rock structures called cratons, and most of the world's better diamond propositions are in cratonic areas-southern and central Africa, northern or northwest Canada, Brazil, Eastern Siberia, a bit of Australia and Karelia in Finland.
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Areas of lower projected hazard potential are associated with mountainous terrain and cratons (geologically stable interior portions of continents) where bedrock is at or near the surface.
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The old cratons, stable interior sections of the continental crust, are thicker and have high magnetic mineral content.
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These features are often located on the edge of cratons.
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Prior to this period, the North American continent saw several periods of very active growth with the amalgamation of once distinct cratons and the addition of rock along its margins.
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Both of these topographic features are often associated with cratons and their exposed shield and platform surfaces.
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Eurasia is composed several distinct cratons that are separated from each other by the Alps, Ural, and Himalaya mountain belts.
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These units are cratons, mountain belts, and continental margins.
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