Inclined sheet of alkaline dolerite intruding quartzites of the Pan-African Stinkfontein Group, Brandsebaai
Alkaline dolerite sheet weathering to a brown colour, Brandsebaai
Dolerite cutting Stinkfontein quartzites, Brandsebaai
Coarse interior of an alkaline dolerite, cut by several interlocking hydrothermal veins, Brandsebaai
Brandsebaai on the west coast has been
excavated by wave action on a wide alkaline dolerite dyke
Fine grained margin of the main Brandsebaai
dolerite dyke
Bostonite dyke cutting basement gneisses
Dolerite dyke cutting basement gneisses
Dolerite dyke cutting
basement gneisses
Thin stringer dykelet
cutting augen gneisses
Dolerite dyke cutting
basement gneisses
Wide dolerite dyke
cutting Namaqua gneisses at Tietiesbaai
Younger dyke cutting
the wide Tietiesbaai dolerite
Enclave rich texture
of the younger Tietiesbaai dyke
Intrusive relations
between the younger enclave-rich dyke and the Tietiesbaai dolerite
The feldspathic enclaves
in the younger Tietiesbaai dyke appear to be derived from the country
rock gneisses
Bostonite dyke intruded
parallel to Pan-African schistosity in Namaqua metasediments
Porphyritic plagioclase
in the Zout River ferrodolerite
Road through Kogelfontein
running through outcrops of the Cretaceous granite
Outcrops of granite
south of Riepoort
Kogelfontein amidst
the rounded boulders of Cretaceous granite
Outcrops of Cretaceous
syenite at Sandkop
Coarse feldspar texture
of the Sandkop syenite
Sandkop syenite
Erosive badlands developed
in altered Sandkop syenite
Badlands developed
in the hydrothermally altered country rock gneisses to the north of the
Sandkop syenite pluton
Landsat image of southern
Namaqualand, showing the terrain surrounding the Kogelfontein igneous
centre
Landsat image of southern
Namaqualand, with false colour enhancement
Aeromagnetic map of
the southern Namaquland region, showing the residual magnetic anomalies.
The Kogelfontein igneous centre is underlain by a large anomaly