|Volcanic Tuff||Rocks composed of volcanic ejecta, such as broken pieces of volcanic glass, phenocrysts, rock fragments, etc.|
|Nepheline Syenite||A plutonic rock resembling syenite but containing nepheline and lacking quartz|
|Lava||Solid rock resulting from cooling of hot molten or semi-fluid rock erupted from a volcano or fissure|
|Kimberlite||A rare, blue-tinged, coarse-grained intrusive igneous rock sometimes containing diamonds, found in South Africa and Siberia|
|Foyaite||The foyaites found in the Pilanesberg have different names due to their different mineral compositions.
Four varieties of foyaite are identified in Pilansberg and are called White Foyaite (a coarse-grained rock which crystallised slowly from molten magma inside the earth; it is rich in minerals), Red Foyaite (created when ultra-heated water altered the color & composition of rock), Green Foyaite (nepheline in this rock dissolves and results in a pitted surface) and Ledig Foyaite (also called "Green nepheline syenite").
|Red Syenite||There many varieties of syenite. Red syenite makes good polished facing stone.|
|Florite||Signs of the mining of purple floride can be found in the Reserve. The minerals in these rocks are also a result of ultra-heated water soaked up by the rocks.|
|Uranium-bearing Tuff||Rocks that are mildly radioactive due to its uranium content. The minerals in these rocks are also a result of water soaking into the rocks at the end of the active life of the volcano.|
|Geological sites (indicated on maps of the Reserve) contain some cut and polished rock surfaces.|