Main karoo basin, 120 myr of Earth's history

Main karoo basin, Top: a plate reconstruction at 180 Ma (modified from ref. 12. The Karoo Supergroup is the most widespread stratigraphic unit in Africa south of the Kalahari Desert. Oct 1, 2005 · The Karoo basins of south-central Africa evolved during the first-order cycle of supercontinent assembly and breakup of Pangea, under the influence of two distinct tectonic regimes sourced from The Karoo basins of south-central Africa evolved during the first-order cycle of supercontinent assembly and breakup of Pangea, under the influence of two distinct tectonic regimes sourced from the southern and northern margins of Gondwana. The Karoo Supergroup is defined as a large, complex sedimentary basin in South Africa, consisting of Carboniferous to Early Jurassic sedimentary strata that exceed 5 km in thickness. 2) showing the known and inferred extent of the Karoo Large Igneous Province Jul 28, 2023 · The main Karoo Basin of South Africa and Lesotho preserves c. [4] In southern Africa, rocks of the Karoo Supergroup cover almost two thirds of the present land surface, making part Location and cross section of the Karoo Basin. Oct 1, 2005 · The Karoo basins of south-central Africa evolved during the first-order cycle of supercontinent assembly and breakup of Pangea, under the influence of two distinct tectonic regimes sourced from The most recent attempts to estimate the shale gas resource of the Karoo basin have endeavoured to identify such sweet spots by interpolating sparse legacy data. 2,4-6 These areas represent the most realistic shale gas resource in the Main Karoo basin, but their real gas potential remains to be tested. 120 myr of Earth's history. From the early Permian, the Karoo Basin was gradually filled with fluvial and lacustrine deposits, and the alluvial plains were In the main Karoo Basin, the Formation is subdivided into three zones, of which the lower and upper zones contain deposits of ephemeral rivers, streams and lakes, reflective of fluctuating wetter . Stratigraphic chart with the major lithostratigraphic subdivisions of the Karoo Supergroup in the main Karoo Basin of South Africa (based on the time scale of Palmer, 1983, and compiling information from Rubidge, 2005 and Catuneanu, 2004a). The supergroup consists of a sequence of units, mostly of nonmarine origin, deposited between the Late Carboniferous and Early Jurassic, a period of about 120 million years. The sedimentary rocks of its Karoo Supergroup record massive environmental changes from the glacial Carboniferous to desert dunes and fiery flood basalts in the Early Jurassic. 60 ; Fig. It includes the Early Permian Ecca Group, which is characterized by organic-rich mudstones, siltstones, and sandstones deposited in shallow water deltas and wetlands. Several Mississippi-like rivers flowed over the silted up Karoo Basin from the south, creating rich new habitats for a variety of flora and fauna. Above: Geological map of the Main Karoo Basin and surrounding Karoo-aged sedimentary sub-basins and volcanic outliers in South Africa, Lesotho and Swaziland, modified from Vorster (2001). Jul 28, 2023 · The main Karoo Basin of South Africa and Lesotho preserves c. The terrestrial (as opposed to lacunar or marine) deposits created by these rivers gave rise to the Beaufort Group. Oct 1, 2005 · The term “Karoo” was extrapolated from the main Karoo Basin of South Africa, to describe the sedimentary fill of all other basins of similar age across Gondwana.


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