Rocks resistance to erosion

Abstract

Some data are given on erosional resistance of loose, coherent and solid rocks, the resistance have been determined by rock erosion with horizontal jet of water, on the base of calculation of the ratio of the jet power N to erosion rate V: R=N/V. The resistance to erosion varies within wide limits - from 1 (sands) and 30 (light loam) to 1*10²⁰ (basalt, quartzite).