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


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.

This page last updated: 18 May, 2002 15:38
Web Author: Jim Pisarowicz