rimrock

English

Etymology

From rim +‎ rock.

Noun

rimrock (plural rimrocks)

(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

Verb

rimrock (third-person singular simple present rimrocks, present participle rimrocking, simple past and past participle rimrocked)

(transitive) To drive (animals) over a cliff edge.