- oceanic crust
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океаническая кора
English-Russian dictionary of geology. 2011.
oceanic crust
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oceanic crust — noun That part of the Earth s crust that is normally characteristic of oceans, consisting of approx 5km water, 1km sediments and 5km basaltic rocks • • • Main Entry: ↑ocean … Useful english dictionary
Oceanic crust — Age of oceanic crust. The red is most recent, and blue is the oldest. Oceanic crust is the part of Earth s lithosphere that surfaces in the ocean basins. Oceanic crust is primarily composed of mafic rocks, or sima, which is rich in iron and… … Wikipedia
oceanic crust — The outer layer of the Earth surface that lies beneath the oceans. As oceanic crust is denser than continental crust it generally lies below sea level … Geography glossary
oceanic crust — /oʊʃiænɪk ˈkrʌst/ (say ohsheeanik krust) noun Geology that portion of the earth s lithosphere which forms the floor of much of the oceans. See sima. Compare continental crust …
Oceanic trench — Oceanic crust is formed at an oceanic ridge, while the lithosphere is subducted back into the asthenosphere at trenches. The oceanic trenches are hemispheric scale long but narrow topographic depressions of the sea floor. They are also the… … Wikipedia
Crust (geology) — Geologic provinces of the world (USGS) Shield … Wikipedia
Oceanic plateau — An oceanic plateau (also submarine plateau) is a large, relatively flat submarine region that rises well above the level of the ambient seabed.[1] While many oceanic plateaus are composed of continental crust, and often form a step interrupting… … Wikipedia
Oceanic basin — Diagrammatic cross section of an ocean basin, showing the various geographic features Hydrologically, an oceanic basin may be anywhere on Earth that is covered by seawater, but geologically ocean basins are large geologic basins that are below… … Wikipedia
Oceanic core complex — An oceanic core complex (OCC), or megamullion, is a seabed geologic feature that forms a long ridge perpendicular to a mid ocean ridge. It contains smooth domes that are lined with transverse ridges like a corrugated roof. They can vary in size… … Wikipedia
Oceanic zone — Marine habitats The oceanic zone is the deep open ocean water that lies off the continental slopes Littoral zone Intertidal zone … Wikipedia
Oceanic lithosphere — is typically about 50 100 km thick (but beneath the mid ocean ridges is no thicker than the crust), while the continental lithosphere has a range in thickness from about 40 km to perhaps 200 km; the upper 30 to 50 km of the… … Wikipedia
