Magmatic bodies and problem of denudation cut-off

Abstract

Practice of special studies at some regions of the USSR (e. g. Northern Caucasus, Crimea, Aldan Plateau, Transbaikalian area, Far East) showed that magmatic bodies can be used for estimation of the thickness of the layer of denudation. It is necessary also to take into consideration that intrusive bodies with holocrystalline texture can be formed near the Earth's surface, and bodies of prophyritic medium-grained and micrograined texture - quite close to it. Within the studies middle and high mountain regions the lowering of interfluve surface by denudation most often is about few hundred meters, and seldom exceeds one thousand meters.