Of the Urals, but the question as to the glaciation of the Urals still remains open.
The unusual glaciation of the east coast is evidently owing to the north polar current carrying the ice masses from the north polar basin 4 south-westward along the land, and giving it an entirely arctic climate down to Cape Farewell.
Glaciation was formerly much more extensive, old moraines being observed down to 12,000 ft.
These afford the clearest evidences of glaciation on a great scale in early Carboniferous times.
Glaciation.-In the central and western parts of the Tian-shan there exist numerous indications of former glaciation on an extensive scale, e.g.