Ecca Glacial Series (Dwyka Conglomerate).
The Dwyka conglomerate rarely attains any great thickness though forming wide outcrops.
The Dwyka conglomerate resembles the same bed in the Cape province.
Of the Karroo System all the groups from the basal Dwyka Conglomerate to the Cave Sandstone of the Stormberg series (see Cape Colony) are represented; but these rocks have not been so minutely subdivided as in the Cape.
The Dwyka Conglomerate forms a narrow outcrop in the north-west, and is known from boreholes to extend over large areas beneath the Ecca Shales and to rest directly on rocks of older age.