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USGS CMG InfoBank: Lab Limitations


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Comment: 12:38 - 13:04 (00:26)

Source: Annenberg/CPB Resources - Earth Revealed - 14. Intrusive Igneous Rocks

Keywords: plutonic, "James Sadd", cooling, water, magma, intrusion, "igneous rock", tectonic

Our transcription: The effect of cooling rate, water content, and magma compositions on the resulting textures of intrusive igneous rocks can be investigated in a more complete and quantitative way using laboratory experiments.

But a lab alone cannot recreate the geologic processes that cause a magma to form.

These processes operate deep within the Earth's interior, and they're usually tied to tectonic processes and the movement of plates.

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U.S. Department of the Interior \| U.S. Geological Survey URL: http://walrus.wr.usgs.gov/infobank/programs/html/school/moviepage/13.01.14.html Page Contact: InfoBank staff Page Last Modified: Tue Dec 16 06:31:13 PST 2008 (wcs)