Graben
Depressed block of planetary crust bordered by parallel normal faults
Graben
A graben () in geology is a depressed block of the crust of a planet or moon, bordered by parallel normal faults.
Read on Wikipedia · Image Horst_graben.jpg: U.S. Geological Survey derivative work: Gregors (talk) 11:17, 7 June 2011 (UTC), Public domain
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