Coastal & Marine Geology InfoBank

USGS CMG InfoBank: Ocean-Continent Convergence Zone


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Comment: 06:10 - 06:37 (00:27)

Source: Annenberg/CPB Resources - Earth Revealed - 6. Plate Dynamics

Keywords: "Jason Saleeby", "plate tectonics", "oceanic crust", "continental crust", plate, subduction, Andes, "South America", "Pacific Plate", continent, andesite, rhyolite, "volcanic chain", volcano, "granitic rock", eruption

Our transcription: Now, the second instance would be when an oceanic plate is going down under a continental plate.

The type example of this would be the Andes in South America where the Pacific plate is going underneath the South American continent

In this area above the subduction zone, you have an andesitic and sometimes rhyolitic volcanic chain, which is much more overall granitic composition which is erupting.

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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/05.02.08.html Page Contact: InfoBank staff Page Last Modified: Tue Dec 16 06:30:09 PST 2008 (wcs)