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Target Earth: The asteroid impact history of Australia

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Lecture Theatre 1, Ground Floor

Hedley Bull Building

130 Garran Road

Canberra, Australian Capital Territory 2601

Australia

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Book launch of Dr Andrew Glikson and Franco Pirajno's latest book, Asteoroid Impacts, Crustal Evolution and Mineral Systems with Special Reference to Australia.

When viewed from space, by distinction from Mars, Venus, Mercury and the Moon, Earth betrays little or no asteroid impact cratering. This impression, however, is more apparent than real―the result of the coverage of some 2/3 of the Earth surface by oceans, as well as the dynamic tectonics of Earth, including accretion and subduction of plates and intensive erosional processes, which obscure its impact history. Thanks to the long-term stability of the Australian crust, geological and geophysical explorations have uncovered at least 38 confirmed impact structures and at least 43 ring and dome structures many of which constitute possible to probable asteroid impact structures. The Australian impact record includes asteroid ejecta deposits signifying impact by projectiles up to about 50 km in diameter and giant dome structures representing the rebound of the crust due to impacts by asteroids up to about 20 km in size, some of which resulted in the mass extinction of species.

About the presenter

Dr Andrew Glikson, an Earth and paleo-climate scientist, graduated at the University of Western Australia. He has conducted geological surveys of the oldest geological formations in Australia, South Africa, India and Canada, studied large asteroid impacts, including effects on the atmosphere and the oceans, the effects of fire on human evolution and the mass extinction of species.

The book will be launched by Professor Stephen Eggins and Professor Charley Lineweaver. Professor Stephen Eggins is the Director of ANU Research School of Earth Science and Professor Charley Lineweaver is the Director of ANU Planetary Science Institute (PSI).

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Location

Lecture Theatre 1, Ground Floor

Hedley Bull Building

130 Garran Road

Canberra, Australian Capital Territory 2601

Australia

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