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Geology of Australia and New Zealand, HWS/UC 2007 8. Great moments in Australian Geology including formation of ore deposits.

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Presentation on theme: "Geology of Australia and New Zealand, HWS/UC 2007 8. Great moments in Australian Geology including formation of ore deposits."— Presentation transcript:

1 Geology of Australia and New Zealand, HWS/UC 2007 8. Great moments in Australian Geology including formation of ore deposits

2 Some important dates… 4.4 Ga Oldest mineral grain, zircon from sandstones in SW Australia 3.8-4.0 Ga, Oldest rocks, Acosta Fm, NW Canada 3.5-3.8 Ga, Oldest biomarkers (organic compounds with enriched light isotopes of C), Isua, Greenland 3.4 Ga, Oldest claimed fossils, Warrawoona Group, W. Australia 2.7 Ga, Oldest accepted fossils, South Africa 2.7 Ga, Methylhopanes, metabolic products of cyanobacteria, Pilbara, W. Australia 640 Ma, Earliest multicellular fossils, Ediacaran Hills, South Australia 580 Ma, Complex animal fossils, Burgess Shale, Canadian Rockies after ca. 550Ma, Abundant fossils (hard skeletons), widespread ca. 350Ma, Development of land plants, followed by massive coal deposition, ca. 320-250 Ma

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