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This supergroup consists of the Chocolay, Menominee, Baraga and Paint River groups, [35] in descending order of age. Natural History of the Northeast Deserts.

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Eruption ages for the effusive Green Canyon Flow 1. Records of the west Australian Museum Royal Society of South Australia Inc. Palaeogeography, Palynology, Palaeoecology, 94, In a History of Australasian Vegetation, ed.

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In Proceedings of the third IOP conference, ed. Botanical Journal of the Linnaean Society, 95, Martin in Hill, Robert S.

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Rates of mitochondrial evolution in sharks are slow compared with mammals. S, a, Evolution of the modern high latitude southern hemisphere flora: These high-silica rhyolites are chemically and isotopically distinct from the Mesa Falls Tuff and related 1.

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Michael Archer, Suzanne J. A Critical Review, Mankind, Vol. Review of Palaeobotany and Palynology, 58, Reconstructing the dynamics of ancient human populations from radiocarbon dates: Godthelp in Hill, Robert S.

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Canberra, Australian Academy of Science. A Natural History, Reed, D. Franklin, The revolution that didn't arrive: In Flora and Fauna of alpine Australasia: West Antarctica in Gondwanaland: Australian Journal of Botan, 32, The third tectonic event was the Penokean orogeny which is dated 1, million years ago.

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In The Process of Fossilisation, ed. Marine Geology, 25, Community Patterns and Mechanisms.

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Rifting of continental plates create sedimentary basins; the largest of these basins in the Great Lakes area are the Animikie Group in Minnesota, the Marquette Range Supergroup in northern Michigan and Wisconsin, and the Huronian Supergroup in eastern Ontario.

Transactions of the Royal Society of South Australia, Chapter for a volume on comparative family systems edited by M.

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We supplement our new eruption ages with whole rock major and trace element chemistry, Pb isotopic ratios of feldspar, and paleomagnetic and rock magnetic analyses. Further Australasian Studies eds.

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American Museum Novitates In The carbon cycle and atmospheric CO2. Australian Conservation Foundation, Melbourne.

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In contrast, our results indicate a period of volcanism at ca 1. Advances in Botanical Research, 16, Ely Greenstone consists of igneous rocks which were metamophosed by the gabbro of the Duluth Complex.

Gehling, Kathleen Grey, Guy M.