Microsoft Word - PhD Thesis Final.pdf - University of Limpopo ...

and 1200 metres 99 . It represents a monotonous development of a medium-
grained, thinly laminated, yellowish sandstone which displays a large-scale
cross bedding and, sparingly, asymmetrical ripple mark. Locally, a poorly
sorted conglomerate containing angular clasts is developed at the base.
Next to the Makgabeng, on the south-east is a small Setlaole formation,
which is at the base of the Waterberg Group 100 . It is part of the Hout River
Gneiss, the Rooiberg Group and the Nebo Granite 101 . It has a maximum
thickness of about 1 000 metres South Villa Nora but thins gradually
towards the Blouberg area 102 . Setlaole consists of medium- to coarse-
grained, dark-coloured sandstone with intercalations of conglomerate,
feldspathic grit, arkoses and blackish mudstone 103 . Locally, around Setlaole
Hill, a 6-metre-thick volcaniclastic bed represented by fine-grained, blackish
tuffaceous shale and ignimbrite is developed at the base. The ignimbrite
occasionally exhibits flow banding 104 .
The rock types found in the Makgabeng range and the surrounding
formations, have weathered into various soil types. (See the map in
annexure). These soil types, with their various chemical characteristics,
99 G. Brandl, The Geology of the Pietersburg area, p. 24.
100 Ibid, p. 24.
101 Ibid, p. 24.
102 Ibid, p 24.
103 Ibid, p. 24.
104 Ibid, p. 24.
75