Search results
Results from the WOW.Com Content Network
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 ...
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.
Quigley MC. et al. 2010. Late Cenozoic tectonic geomorphology of Australia. Geological Society of London Special Publication 346: 243–265. Royer J-Y & Gordon RG. 1997. The motion and boundary between the Capricorn and Australian Plates. Science 277: 1268–1274. Tregoning P. 2003. Is the Australian Plate deforming? A space geodetic perspective.
In area, the onshore part of the Carnarvon Basin covers about 115,000 km 2 and the offshore part covers approximately 535,000 km 2 with water depths up to 3,500 m. [10] Less than 5% of the state's gas comes from fields near Dongara, part of the Perth basin, which extends about 1300 km along the southwestern margin of the continent.
Geologically, the aquifer is part of what is known as the Yarragadee Formation, which is a relatively thick geological unit in the Perth Basin. Formed during the Jurassic Period, the Yarragadee Formation is composed primarily of non-marine fluviatile feldspathic, poorly sorted sandstones which are porous and poorly cemented, hence allowing for ...
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.
The Basin formed on top of the Late Cretaceous Chalk Group, which is exposed on the dip slopes of the Chilterns and North Downs. Within the centre of the basin the Chalk is mainly covered by Palaeocene, Eocene and younger rocks, though the chalk is also brought to the surface by localised folds and faults, for example at Windsor Castle, Lewisham and Purfleet.
The London–Brabant Massif or London–Brabant Platform is, in the tectonic structure of Europe, a structural high or massif that stretches from the Rhineland in western Germany across northern Belgium (in the province of Brabant) and the North Sea to the sites of East Anglia and the middle Thames in southern England.