The NSS Bulletin - ISSN 1090-6924
Volume 50 Number 1: 17-20 - June 1988

A publication of the National Speleological Society

Pebble Indentations: A New Speleogen from a Colorado Cave
Donald G. Davis and Cyndi Mosch

Abstract

Claystone pebbles in the margin of a rubble flow have sunk into the limestone wall of a cave alcove, creating pockmarks and grooves. These unusual forms were apparently etched by corrosive moisture, either vadose or condensed from the cave air, permeating the rubble mass.

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