Page:South African Geology - Schwarz - 1912.djvu/210

 immense thickness of Karroo Beds, which, remembering the thinness of the system in the Transvaal, indicates that here an entirely separated body of water was receiving sediments.

In the north of the lake the Karroo Beds consist of blue and grey shales resting on the tilted Old Red Sandstones of the Mafingi Series; these are the Drummond Beds, and contain scales of fish.