rimrock

[ rim-rok ]

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.

rimrock

/ ˈrɪmˌrɒk /

noun

1. rock forming the boundaries of a sandy or gravelly alluvial deposit

Word History and Origins

Origin of rimrock¹

An Americanism dating back to 1855–60; rim + rock ¹

Example Sentences

We followed along the ledge around the rimrock until we came to a little pass through.

From Project Gutenberg

On either side were brownish red jagged peaks and rimrock faces, specked with snow.

From Project Gutenberg

The rimrock and the gravels above and below it constitute the Rattlesnake Formation.

From Project Gutenberg

One after another they leaped over the edge of the rimrock until most of the flock was destroyed.

From Project Gutenberg