DCHP-1 Online
rim Placer Mining 
n. an outcropping or ridge of rock, especially one that once formed the bank of a stream.
See also: rimrock ((n.)) (def. 1)
- 1869 (1962) He hammers at the rock, / Believin' its a rim, / When ten to ane 'tis naething / But his fancy's whim. . . .
- 1963 The first shallow diggings gave way to drifting on bedrock, then to hydraulicking, and finally to sniping operations along the rims or on weathered bedrock.
- 1869 (1962) He hammers at the rock, / Believin' its a rim, / When ten to ane 'tis naething / But his fancy's whim. . . .