Gondwana basins of India occupy the middle of a 7500 km sector of radial valleys and lobes in central-eastern Gondwanaland

Ram C. Tewari, J. J. Veevers

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

33 Citations (Scopus)

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 languageEnglish
Title of host publicationProceeding of the Eighth Gondwana Symposium
EditorsR. H. Findlay, R. Unrug, M. R. Banks, J. J. Veevers
Pages507-512
Number of pages6
Publication statusPublished - 1993
EventThe Eighth Gondwana Symposium - Hobart, Australia
Duration: 21 Jun 199124 Jun 1991

Conference

ConferenceThe Eighth Gondwana Symposium
CountryAustralia
CityHobart
Period21/06/9124/06/91

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Tewari, R. C., & Veevers, J. J. (1993). Gondwana basins of India occupy the middle of a 7500 km sector of radial valleys and lobes in central-eastern Gondwanaland. In R. H. Findlay, R. Unrug, M. R. Banks, & J. J. Veevers (Eds.), Proceeding of the Eighth Gondwana Symposium (pp. 507-512)