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rimrock - 1 dictionary result

rim⋅rock

  [rim-rok]
Use rimrock in a Sentence
–noun Geology.
1. rock forming the natural boundary of a plateau or other rise.
2. bedrock forming the natural boundary of a placer or of a gravel deposit.
Origin:
1855–60, Americanism; rim + rock 1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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