Title: Large scale slumping in the Ashburton trough of Western Australia
Abstract: Large submarine slumps occur mainly at two stratigraphic levels in the Lower Proterozoic turbidites of the Ashburton (Wyloo) trough which is adjacent to the southwest to an Archaean craton, the Pilbara block, and its Lower Proterozoic cover. The slumped masses are either olistostromes and conglomerates or large olistoliths of several kilometres strike length, of volcanic and sedimentary rocks similar to those of the craton cover and marginal platform. They have, by their emplacement, locally raised the sea floor to support localized shelf facies sediments within the trough area. The olistoliths either occur as rigid slices or as convoluted masses. The slumped rocks could only have come from areas where the sequence is now incomplete, either from the craton, from anticline tops, or from the trough area where it can be observed, from an anticline core, that the rocks are chaotic and reduced in volume with hiatuses. The distribution and geometry of the deposits suggests a complex history of recycling for the olistoliths.
Publication Year: 1981
Publication Date: 1981-06-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 4
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