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    Ordovician period dating

    It contained the modern continents of Australia, Africa, Southern Europe, Antarctica and South America.During the Ordovician Period, Gondwana gradually moved toward the South Pole until it covered the pole at the end of the period.The type section for the Ordovician, like that of the Cambrian and Silurian, is also in western Wales.The system was founded by Charles Lapworth in 1879, in part as a compromise to resolve the Murchison-Sedgwick conflict over their overlapping claims for their Silurian and Cambrian systems: In 1831 Sedgwick and Murchison commenced work on the stratigraphy of northern Wales.

    Ordovician rocks were first found in Wales, so its name comes from a tribe of people who once lived in the area where the rocks were found.This page describes the Ordovician Period, including stratigraphy, paleogeography, and famous lagersttten, followed by a sketched outline of some of the major evolutionary events.Keywords: Ordovician, Ordovician biota, fossil record, evolution The Ordovician Period is the second period of the Paleozoic Era.The Ordovician, named after the Celtic tribe of the Ordovices, was defined by Charles Lapworth in 1879 to resolve a dispute between followers of Adam Sedgwick and Roderick Murchison, who were placing the same rock beds in northern Wales into the Cambrian and Silurian periods respectively.While recognition of the distinct Ordovician Period was slow in the United Kingdom, other areas of the world accepted it quickly.

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