Coastal & Marine Geology InfoBank

USGS CMG InfoBank: Continental and Oceanic Crusts


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Comment: 07:46 - 08:12 (00:26)

Source: Annenberg/CPB Resources - Earth Revealed - 3. Earth's Interior

Keywords: crust, "continental crust", "oceanic crust", granite, basalt, ocean, continent

Our transcription: The Earth's crust itself occurs in two varieties: continental crust, which forms all the large land masses, and oceanic crust that underlies all the great ocean basins.

An important distinction between these two types of crust is that they are mostly made up of different kinds of rock.

Granitic rock is typical of continents, while basalt predominates in ocean basins.

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Accessibility FOIA Privacy Policies and Notices
U.S. Department of the Interior \| U.S. Geological Survey URL: http://walrus.wr.usgs.gov/infobank/programs/html/school/moviepage/03.01.11.html Page Contact: InfoBank staff Page Last Modified: Fri Sep 18 02:35:44 PDT 2009 (wcs)