Dwyka Group, a group of sedimentary geological formations in Southern Africa
Dwyka Group | Dwyka |
The Nooitgedacht Glacial Pavements, upstream along the Vaal River between Barkly West and Kimberley, with evidence of the Dwyka glaciation some 300 million years ago.
As the Dwyka glaciers moved, grinding their way southwards, the rocks and rubble that became embedded in their belly smoothed the underlying Andesite rock pavements and scoured out scratch marks, known as striations.