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Meteorite impacts in Western Australia and Australia. An overview¦a smorgasbord of Earth wounds
8 March, 7:30 pm-9:30 pm
Photo: Courtesy Dept of Mines and Petroleum, Government of Western Australia Hickman Crater from the west
Made only in ultra-high pressures such as big meteorite impacts, proof of the impact. Photo M. Freeman
Mike Freeman is our guest speaker tonight and he will give an illustrated talk on how our Earth has been wounded many times by lumps of rock or masses of iron since it was formed.
Some of these impacts have had a major effect on the evolution of life , such as the Chixulub meteorite in Mexico that led to the demise of the dinosaurs and allowed mammals to become predominant, leading to our existence!
Come and hear of some of these impacts that are still visible in our home State and country – you will be surprised at the nature of some of them and of the indications of very profound reactions to these supersonic impacts.
Meteorite* impacts have had a huge effect on the Earth through geological time and here in WA we have a number that were probably influential. We only have three actual craters in WA, although geological research has shown there are many more, with landforms that are not easy to recognise but that show the results of bodies hitting our planet at speeds in excess of 10 km per second!
Mike Freeman is a geologist with an extensive background in mineral exploration and mining development, engineering geology, hydrogeology, and forensic investigations. It was he who “found” the Kundana gold mineralisation trend and he has much experience in phosphate rock evaluation and mine planning. Mike also has experience in the application of geology to land-use planning to protect heavy-mineral sand deposits, and sand, gravel and rock access near Perth. He now has a strong interest in ‘geo-heritage’ and ‘geo-tourism’.
*A point of terminology: when they pass through the earth’s atmosphere leaving a glowing trace, asteroids are referred to as meteors, and if we can pick up parts of the original body they are called a meteorite.