watershed Caldera Demonstration Model

More information on the USGS Multimedia Gallery: http://gallery.usgs.gov/videos/333

A caldera is a large, usually circular volcanic depression formed when magma is withdrawn or erupted from a shallow underground magma reservoir. It is often difficult to visualize how calderas form. This simple experiment using flour, a balloon, tubing, and a bicycle pump, provides a helpful visualization for caldera formation.

watershed Caldera Demonstration Model
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Science & Technology	Upload TimePublished on 29 Dec 2010

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