Abstract
During Permian and Triassic times, the Gondwana sequence of India, lateral equivalents in southern Australia and southeastern Africa, and an upslope equivalent in coastal East Antarctica were deposited in a 7500 km sector of valleys and lobes that radiated through 180° of arc from an inferred upland in East Antarctica. Initially glacigenic, subsequently coal-measure sediments, and finally redbeds were deposited during the stage of Pangean sagging. The middle part of the sector, crossed by alluvial valleys, is underlain by brittle Precambrian basement which, during the Late Triassic and Jurassic stage of Pangean rifting, was dismembered into grabens and half-grabens. The outer parts of the sector in southeastern Australia and southern Africa underlain by flexible Paleozoic basement were crossed by sedimentary lobes in ovate basins little deformed by later rifting. In its vast scale, the Gondwana sector of radial drainage is matched in the modern world only by the drainage that radiates north from the Central Asian upland.
Original language | English |
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Title of host publication | Proceeding of the Eighth Gondwana Symposium |
Editors | R. H. Findlay, R. Unrug, M. R. Banks, J. J. Veevers |
Pages | 507-512 |
Number of pages | 6 |
Publication status | Published - 1993 |
Event | The Eighth Gondwana Symposium - Hobart, Australia Duration: 21 Jun 1991 → 24 Jun 1991 |
Conference
Conference | The Eighth Gondwana Symposium |
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Country/Territory | Australia |
City | Hobart |
Period | 21/06/91 → 24/06/91 |