Geochemistry of Epigenesis

In its classical sense "epigenesis" refers to all geological processes originating at or near the surface of the earth. It thus embraces all those phenomena which we associate with the land­ scape; Perel'man has already written extensively on this subject. The landscape, in the physical sense, is controlled by the interac­ tion of exogenic and endogenic agencies-on the one hand, the atmo­ sphere, the wind, the rain, and other components of the weather, the forces of running water and the pl...