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4.1.1. The Griqualand West Basin
The Griqualand West Basin (Fig 4.4.2) extends from just east of Vryburg, trending in a
NE-SW direction up to Nauga-East. The basin is cut by a major Griqualand fault in the
south-western portion which subdivides it into two facies; the Prieska facies and the
Ghaap Plateau facies (Eriksson & Altermam, 1998). Sedimentary rocks deposited in
either the Schmidtsdrif or Cambellrand subgroups north and east of the Griquatown
fault are known as the Ghaap plateau facies and while sedimentary rocks deposited
during the same time frame south and west of the Griquatown are known as the Prieska
facies (Calvin, 2003). The stratigraphical column of the Griqualand Basin in the Ghaap
Plateau Facies is shown in Figure 4.4.3. Only the Ghaap Plateau will be discussed here
as the limestone deposits described in this study are developed within the area
occupied by this facies.
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