Geologic Time
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Dinosaur Mass Extinction Interactive
www.pbs.org/wgbh/evolution/extinction/dinosaurs/dino.swfAn nice interactive lesson from PBS on the different possibilities for the mass extinction at the end of the cretaceous.
Fossils, Rocks & Time - USGS
pubs.usgs.gov/gip/fossils/contents.htmlA primer from the United States Geological Survey on rocks, fossils and the geologic record.
Virtual Dating
www.sciencecourseware.org/VirtualDating/Learn how scientist date rocks, minerals and artifacts through this series of slides and questions.
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