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| Continent | Africa |
|---|---|
| Region | Botswana,South Africa |
| Coordinates | 25°05′55″S26°12′36″E / 25.0986°S 26.2100°E /-25.0986; 26.2100 |
| Borders | Mozambique |
TheTransvaal Supergroup is astratigraphic unit in northern South Africa and southernBotswana, situated on theKaapvaal craton, roughly between 23 and 29 degrees southern latitude and 22 to 30 degrees eastern longitude. It is dated to the boundary between theArchean andProterozoic eras, roughly 2,500 Mya. It is delimited by theWitwatersrand Basin (2,700 Mya) and theBushveld Igneous Complex (2,050 Mya).
It consists of three parts,
Transvaal sedimentation began with predominantly clastic sedimentary rocks (Black Reef-Vryburg Formations) followed by carbonate rocks andbanded iron formations (Chuniespoort-Ghaap-Taupone Groups). After an erosional hiatus, the clastic sedimentary rocks and volcanics of the Pretoria-Postmasburg-Segwagwa Groups were deposited within the three basins, largely under closed-basin conditions. A final stage of predominantly volcanic succession (Rooiberg Group-Loskop Formation) is limited to the Transvaal Basin.
The Campbellrand-Malmani carbonate platform is part of the Chuniespoort Group and originally covered all of the Kaapvaal craton. It has a thickness of over 1 km in both the Malmani and Campbellrand Subgroups.The Malmani Subgroup is situated northwest of Johannesburg. It consists ofdolomite andchert with only minor clastic sediments.
Several workers such as an environmentalist, Isaac Chuene, Raymond Ngobeni and Khutso Masemola noted the presence of fossils in the Chunniespoort mountains of the Chunniespoort Group.
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