A term usually used to describe surface areas that have been stripped of their soil exposing bare rock; large areas where catastrophic floods have scoured the rocks clean of any loose debris and soil.

Elevated, essentially flat basalt covered land with only a thin soil cover.

An irregular land surface of basalt that has been scoured of its soil cover by floods.

A flat region with exposed lava rock and a thin layer of soil and sparse vegetation. Usually cut through with channels.

Produced by cataclysmic Pleistocene floods (Missoula Floods) which removed soil and gouged out bedrock, leaving a scab-like bedrock surface in eastern Washington and the Columbia River Gorge.