Pre-cambrian mountain chains
3, 4

Hhe existence pre-cambrian mountain chains resembling those of later geological times has been much discussed in modern geology.
The presupposition of using actualistic methods in the tackling of this problem is that the physical and chemical conditions even in those ancient times caused the geological processes to run along the same lines as later.
if this can be convincingly demonstrated, we may next compare the mountain chains as to material and architecture. Every individual mountain chain exhibits several pecularities, distinguishing it from the other chains, but there are also common features which must be found even in the pre-cambrian deformation areas if they are to be compared with younger mountain chains.