The great Karroo System of South Africa was divided by its discoverer, Andrew Geddes Bain, into four formations on lithological characters. They are—
The Stormberg Series.
The Beaufort Beds.
The Ecca Beds.
The Dwyka Series.
It has long been recognized that the Dwyka conglomerate, which forms a large part of the lowest series, is of glacial origin, and the common occurrence of smoothed and striated pavements below it all along its northern exposure seems to show that it is the product of a great continental ice-sheet.
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