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- Title
Basin development during the deposition of the Elliot Formation (Late Triassic - Early Jurassic), Karoo Supergroup, South Africa.
- Authors
Bordy, Emese; Hancox, P. John; Rubidge, Bruce S.; Ashwal, L. D.
- Abstract
The integrated results of a facies analysis and provenance study of the Late Trissic to Early Jurassic Elliot Formation (Karoo Supergroup) provide some new insights into the development of the main Karoo foreland system of South Africa. Based on changes in the fluvial style, palaeocurrent pattern, provenance, isopach trends and fossil content, a regional lithostratigraphic subdivision of the Elliot Formation is proposed. In addition, the boundary between the Lower and Upper Elliot formations appears to be a second order sequence boundary. This unconformity was probably generated by the last stage of orogenic loading of the Cape Fold Belt, which interrupted the overall, first order orogenic unloading of the system, suggesting that tetonically controlled flexural subsidence existed in the main Karoo Basin until at least the end of Triassic. The magnitude of this pre-Upper Elliot Formation suggest that the first stages of inversion from a compressional to extensional tectonic regime began only in the Early Jurrasic.
- Subjects
KAROO Supergroup; KAROO (South Africa); SOUTH Africa; FACIES; JURASSIC paleopedology
- Publication
South African Journal of Geology, 2004, Vol 107, Issue 3, p397
- ISSN
1012-0750
- Publication type
Article
- DOI
10.2113/107.3.397