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Geology of Australia and New Zealand, HWS/UC 2007

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

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Geology of Australia and New Zealand, HWS/UC 2007

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

  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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