rimrock

Noun. (geology) An outcrop of hard rock, often in the form of a cliff at the edge of a plateau, that forms the margin of a gravel deposit.

This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.

This entry was last updated on RefTopia from its source on 3/20/2012.