|
OceanDocs >
Africa >
African Marine Science - Oceanography - Fishery >
Miscellaneous >
Please use this identifier to cite or link to this item:
http://hdl.handle.net/1834/427
|
| Title: | Thermal Anomalies, Updoming And Non-Marine Sequence Stratigraphy: A Case History From The Karoo Basin, South Africa |
| Authors: | Turner, B.R. |
| ASFA Terms: | Geology |
| Issue Date: | 1998 |
| Abstract: | The Karoo Basin is one of the most extensively exposed and well studied of all the major
Gondwana basins along the southern margin of Gondwana. It has been modelled as a retroarc
foreland basin in which the basin-fill has been divided into 1st, 2nd and 3rd order
depositional sequences, bounded by unconformities and/or abrupt facies changes
(Catuneanu et al., 1999), and linked to specific tectonic events in the adjacent orogen to the
south. In contrast, Johnson et al. (1997) state that ?no significant unconformities are known
to exist within the [Karoo] basin, with the possible exception of the one at the base of the
Upper Triassic Molteno Formation?. The foreland basin model further suggests that
foreland basin tectonics influenced Karoo stratigraphic relations right up to the base of the
Drakensberg Lavas, which are inferred to represent continental rifting, prior to Late
Jurassic-Early Cretaceous separation of east and west Gondwana. This paper presents an
alternative model for stratigraphic evolution of the non-marine Upper Karoo Basin in which
changes in stratal geometries, stacking patterns and accommodation space are explained in
terms of thermally-induced pulsed crustal uplift and continental rifting prior to basalt
eruption and the separation of east and west Gondwana. |
| URI: | http://hdl.handle.net/1834/427 |
| Appears in Collections: | Miscellaneous
|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
|
