Last Glacial Maximum | glacial erratic | Nooitgedacht Glacial Pavements | Last glacial period | Glacial Lake Iroquois | Glacial Lake Columbia | Glacial erratic |
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.