Screes evolution and age in the Crimean flysch low mountains

Abstract

Forms and age of talus base are described for eroded and uneroded scree slopes. Uneroded talus base profile is reconstructed using Lehman equation and appeared to be similar to measured profile. Eroded talus base profiles can be convex, concave, convexconcave, concave-convex and rectilinear. Equations are given which were used for calculation of 25 talus and their base age (under assumption of parallel retreat of scree slope). Average denudation rate for the slope estimated by means of dendrochronology appeared to be 13.6 mm per year. Uneroded talus age corresponds to the age of its base and that of the scree slope. Eroded talus are yuonger than their base and far younger than the scree slope.