A small patch of Pakhuis tillite occurs on the top of Table Mountain at Maclear's beacon, but most of the Pakhuis Formation is found as a thin layer (on average only about 60 m thick) in the Table Mountain Sandstone Formation of the more inland mountains to the west of a line between Swellendam and Calvinia. These diamictite rocks are composed of finely ground mud, containing a jumble of faceted pebbles. They can easily be recognized at a distance as this formation readily erodes into fertile, gently sloping, green swaths in a landscape where this contrasts starkly with the bare rocky surfaces of the quartzites above and below. In several locations the quartzites immediately below the glacial horizon have been rucked into a series of folds. This is believed to have been caused by the movement of ice ploughing into the underlying unconsolidated sands. A good example of this can be seen on a ridge of rocks near Maclear's Beacon on Table Mountain, close to the edge of the plateau overlooking the Cape Town City Bowl and Table Bay.