Title: Continental margin of the Great Australian Bight
Abstract: Seismic, aeromagnetic and gravity data indicate that the continental margin of the Great Australian Bight consists of a Precambrian crystalline shield overlain by 3,000–8,000 ft. of mainly Cretaceous to Recent sediments. Contouring of the irregular sediment to basement contact indicates that the old cratonic surface is dissected by a buried valley-canyon system which feeds seawards across the continental shelf to two large sediment wedges which now form the Eyre and Ceduna marginal plateaus between depths of 200–900 fathoms. A large fan valley system forms the continental rise seawards off the marginal plateaus and represents sediment accumulation off the flanks and sides of these plateaus. Possible Precambrian basement outcrops on the steep continental slope seaward of Precambrian crystalline shield rocks west of the Great Australian Bight, and underlies the Eyre Plateau at depths as shallow as 3,000 ft. suggesting that there has been only moderate sedimentation since the continental drift separation of the Australian-Antarctic continents.
Publication Year: 1970
Publication Date: 1970-01-01
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 18
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot