Ordovician extinction - PowerPoint PPT Presentation

Earth History

Earth History. The Paleozoic Era. Paleozoic Time (544 - 245 Million Years Ago). Bracketed by the two most important biological events in Earth’s history: The first appearance of complex organisms The largest mass extinction on the history of the Earth. . Paleozoic Time.

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Paleobiology and Macroevolution Ch. 22.1-22.5

Paleobiology and Macroevolution Ch. 22.1-22.5. Geological Timeline . Precambrian Paleozoic Mesozoic Cenozoic. Mapping Out The Past. Several Methods: Carbon-14 Dating (living material) K-40 Dating (Certain soil types) Relative dating through strata layers

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