continental crust


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continental crust

[¦känt·ən¦ent·əl ′krəst]
(geology)
The basement complex of rock, that is, metamorphosed sedimentary and volcanic rock with associated igneous rocks mainly granitic, that underlies the continents and the continental shelves.
References in periodicals archive ?
The composition of the continental crust corresponds to a semi-liquid version of the oceanic crust melted by 10 to 30 percent of its original state.
It was accreted to other terranes to constitute a Precambrian continental crust.
If the wide transition zone in the Newfoundland Basin proves to be floored by continental crust that has thinned, faulted, and eroded in a subaerial environment, a fundamental new class of crust will be documented that must be accounted for in future models of continental breakup.
8 Ga) continental crust within the Superior Province (Fig.
The continental crust formation modified the composition of the mantle and the atmosphere, it supports life and it remains a sink for carbon dioxide through weathering and erosion.
The opening papers recount Coward's career and assess his impact on the geological understanding of the deformation of the continental crust.
Bacteria and archaea may reach as far as 4 km below the continental crust and 7 km into the oceanic crust, says Fredrickson.
Here land meets water and shallow water meets deep water, less-dense continental crust meets more-dense oceanic crust, terrigenous sediments are interlayered with biogenic deposits of oceanic origin, and vertical crustal motions of continents are juxtaposed with horizontal motions of oceanic crust.
Professor Trond Torsvik from University of Oslo, Norway, said, "We found zircons that we extracted from the beach sands, and these are something you find typically in a continental crust.
Washington, May 29 (ANI): The continental crust of the Indian tectonic plate was forced down under the Asian plate by around 200 kilometres some 90 million years ago, when the Indian subcontinent clashed with Asia, a research has revealed.
Over time, remelting of the basalt created rocks richer in silica, giving rise to the first continental crust.
And the thin, young, homogeneous oceanic lithosphere can be likened to a clear pane of glass compared with the frosty cracked window that is the old, heterogeneous continental crust.

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