rimrock

/rim-rok/US // ˈrɪmˌrɒk //UK // (ˈrɪmˌrɒk) //

缘石,边缘岩,缘岩,边缘石

Definitions

n.名词 noun

1
Geology.
- : rock forming the natural boundary of a plateau or other rise.
- : bedrock forming the natural boundary of a placer or of a gravel deposit.

We followed along the ledge around the rimrock until we came to a little pass through.
On either side were brownish red jagged peaks and rimrock faces, specked with snow.
The rimrock and the gravels above and below it constitute the Rattlesnake Formation.
One after another they leaped over the edge of the rimrock until most of the flock was destroyed.