Mount Woolnough: the submerged volcano,SE of Sydney,NSW |
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| Authors: | A D Albani P C Rickwood J W Tayton |
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| Institution: | 1. School of Biological, Earth and Environmental Science, The University of New South Wales, Sydney, NSW 2052, Australiaa.albani@unsw.edu.au;3. School of Biological, Earth and Environmental Science, The University of New South Wales, Sydney, NSW 2052, Australia;4. Formerly of the Department of Earth Sciences, Macquarie University, North Ryde, NSW 2109, Australia |
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| Abstract: | Part of a larger investigation of the sea bed off Sydney was a study of the extinct submarine volcano Mount Woolnough. It is located approximately 41 km east of Kurnell, NSW, and protrudes 175 m above the sediment cover at depths of approximately ?550 to ?375 m. Volcanic rock, approximately 2.2 km in diameter, is exposed above the sediment sea floor and is much smaller than its magnetic expression (approximately 13 km in diameter). Samples dredged from Mount Woolnough were conglomerates with phosphatic nodules and volcanic fragments set in a fine foraminiferal sediment matrix. Zircons within the mafic fragments yielded a minimum age of 261 Ma. |
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| Keywords: | Mount Woolnough submarine volcano Permian Cenozoic phosphatic nodules Kurnell |
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