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Rifting of Australia from India and Africa began in the Permian, resulting in the production of a rift basin and half-grabens of the basal portions of the long-lived Perth Basin. Petroleum was formed in the Swan Coastal Plain and Pilbara during this rifting, presumably in a rift valley lake where the bottom was deoxygenated (akin to Africa's ...
The Perth Basin is a thick, elongated sedimentary basin in Western Australia. It lies beneath the Swan Coastal Plain west of the Darling Scarp, representing the western limit of the much older Yilgarn Craton, and extends further west offshore. Cities and towns including Perth, Busselton, Bunbury, Mandurah and Geraldton are built over the Perth ...
(1970)The Darling Scarp : a natural entity: proceedings of symposium held at the Geography Department of the University of Western Australia, November 1969 Perth, W.A.: Nature Conservation Council of Western Australia, Department of Planning and Urban Development, Western Australia.(1993) The Natural resources of the Darling Ranges Perth, W.A ...
The Yilgarn Craton appears to have been assembled between ~2.94 and 2.63 Ga by the accretion of a multitude of formerly present blocks or terranes of existing continental crust, most of which formed between 3.2 Ga and 2.8 Ga.
The Swan Coastal Plain in Western Australia is the geographic feature which contains the Swan River as it travels west to the Indian Ocean.The coastal plain continues well beyond the boundaries of the Swan River and its tributaries, as a geological and biological zone, one of Western Australia's Interim Biogeographic Regionalisation for Australia regions.
They are deposited unconformably over the Western Zone, overlapping with the deposition of the Kimberley Group. The depositional periods of the sediments, determined from rocks near the bottom of the basin, indicate that the Speewah Basin formed around 1835 Ma, at the same time as the granitic and gabbroic intrusions. [18] [14] [2]
The Collie Sub-basin is a pocket of Permian sedimentary rocks with an area of 225 km 2, enclosed within much older Archean rocks of the Yilgarn Craton, near the town of Collie in southwestern Western Australia., [1] [2] Once considered a unique basin, this area, along with the smaller Wilga and Boyup Sub-basins to the south, are now classified as outliers of the Perth Basin, separated from the ...
The Australian plate is a major tectonic plate in the eastern and, largely, southern hemispheres. Originally a part of the ancient continent of Gondwana , Australia remained connected to India and Antarctica until approximately 100 million years ago when India broke away and began moving north.