Discuss : North American Geologic History and Fossils
Geology Making N America: FOSSILS Virtual Field Trip: North American Geologic History and Fossils Video: Making North America: Lifehttp://www.pbs.org/video/nova-making-north-america-life/;
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Geology Making N America: FOSSILS Virtual Field Trip: North American Geologic History and Fossils Video: Making North America: Lifehttp://www.pbs.org/video/nova-making-north-america-life/;