oceanic crust

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oceanic crust

[‚ō·shē′an·ik ′krəst]
(geology)
A thick mass of igneous rock which lies under the ocean floor.
References in periodicals archive ?
And the find of a rare diamond that formed deep below the surface has revealed geological activity that links ocean crust to our planet's mantle.
For example, Mauna Loa contains higher proportions of an igneous rock called pyroxenite, which comes from subducted ocean crust that typically melts at deeper levels than the model suggests.
Discovering the Deep: A Photographic Atlas of the Sea-Floor and Ocean Crust was written by WHOI marine geologist Daniel Fornari and WHOI biologist Timothy Shank and their colleagues Jeff Karson (Syracuse University), Deborah Kelley (University of Washington), and Michael Perfit (University of Florida).
Not your motherAEs terrain, terrane is ofragments of a continent, ocean crust, or volcanic arc, or disrupted combinations of these, that share a common geologic history and have often traveled far from where they originatedo.
at the antipodal location of 2 minute trapezoids for ETOPO2 model Northern hemisphere ocean land ocean continental crust crust Southern ocean 116 207 742 (a) 90 298 294 (b) hemisphere ocean crust 69 665 648 100 490 498 land 38 340 687 (c) 10 185 275 (d) continental 45 504 292 42 371 559 crust Note.
Researchers from the University of Southampton have identified regions beneath the oceans where the igneous rocks of the upper ocean crust could safely store very large volumes of carbon dioxide.
A third surprise, Snow says, casts doubt on one of the main theories of the construction of the lower ocean crust.
This dichotomy arose because ocean crust (made mostly of volcanic basalt) is denser yet thinner than continental crust (made primarily of granite).
Off the coast of Washington state, other researchers have watched microbes creep into and colonize a borehole 280 meters below the seafloor, flushed by water circulating through the ocean crust.
New crust being formed in novel way: Scientists at the Woods Hole Oceanographic Institution (WHOI) have observed ocean crust forming almost ten times farther away from an active ocean ridge than previously recorded.
A recent theory of catastrophic plate tectonics with extremely rapid formation of new ocean crust and magnetic reversals has been proposed and demonstrated in the past three decades.
Research will address structure and seismic behaviour of the ocean crust, dynamics of hot and cold fluids and gas hydrates in the upper ocean crust and overlying sediments, ocean circulation and climate change and their effects on the ocean biota, as well as deep-sea ecosystem dynamics and biodiversity.

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