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The Ordovician - http://www.ucmp.berkeley.edu/ordovician/ordovician.html
An overview of the period from the UC Berkeley Museum of Paleontology. |
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Wisconsin Fossils - http://www.fox.uwc.edu/fossils/wisc/
Ordovician Trentonian fauna from the Galena and Maquoketa of West De Pere and Green Bay, Wisconsin |
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Ordovician Geography - http://vishnu.glg.nau.edu/rcb/Ordovician.html
Description and maps of the continents as they existed at the time. |