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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Deconstructing the transvaal supergroup, South Africa: Implications for palaeoproterozoic palaeoclimate models
Journal of African Earth Sciences, Volume 33, No. 3-4, Year 2001
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Description
Current correlations between the Pretoria and Postmasburg Groups of the Transvaal Supergroup are shown to be invalid. The Postmasburg Group is also demonstrated to be broadly conformable with the underlying Ghaap Group and therefore considerably older (∼2.4 Ga) than previously supposed. The new stratigraphy documents an extensive (100 Ma) and continuous cold-climate episode with a glacial maximum at the Makganyene Formation diamictite. Iron formations of the underlying Asbesheuwels and Koegas Subgroups and overlying Hotazel Formation have similar origins, related, respectively, to the onset and cessation of the glacial event. This interpretation of the Transvaal Supergroup stratigraphy has significant implications for various Palaeoproterozoic environmental models and for the timing of the development of an oxygenated atmosphere. © 2002 Published by Elsevier Science Ltd.
Authors & Co-Authors
Moore, John M.
South Africa, Grahamstown
Rhodes University
Tsikos, Harilaos
South Africa, Grahamstown
Rhodes University
United Kingdom, Oxford
University of Oxford
Polteau, Stéphane
South Africa, Grahamstown
Rhodes University
Statistics
Citations: 68
Authors: 3
Affiliations: 2
Identifiers
Doi:
10.1016/s0899-5362(01)00084-7
ISSN:
08995362
Study Locations
South Africa