Earthquake Hazards Program
A graben is a down-dropped block of the earth's crust resulting from extension, or pulling, of the crust.
Horst and Graben Flash Animation
See also: horst.
Horst and graben diagram.
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U.S. Department of the Interior | U.S. Geological Survey
Page URL: http://earthquake.usgs.gov/learn/glossary/?term=graben
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Page Last Modified: July 24, 2012 17:12:00 UTC