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USGS CMG InfoBank: Mammals Dominate the Land Skip navigational links Search InfoBank     Dictionaries: Our Mapping Systems   The USGS and Science Education   USGS Fact Sheets   Topics   Keywords   Data Dictionary   Metadata Dictionary   Computer Terminology   Digital Formats InfoBank Terms: Activity ID   activity overview   crew   formal metadata   lines   metadata   NGDC   port stops   project/theme   region   ship   stations   time   virtual globe   year   Data Types: bathymetry   geodetic positioning   gravity   ground penetrating radar   imagery   LIDAR   magnetics   metering equipment   navigation   samples   seismic   definitions disclaimer   Data Formats: ARC coverage   E00   FGDC metadata   gridded/image   imaging   material   scattered/swath   Shapefile   vector/polygon       Comment: 17:20 - 17:31 (00:11) Source: Annenberg/CPB Resources - Earth Revealed - 11. Evolution Through Time Keywords: "James Sadd", ecosystem, Mesozoic, extinction, evolution, mammal Our transcription: The ecological crisis of the Mesozoic extinction, and the tectonic activity which followed, helped set the stage for events in evolution, which ultimately allowed mammals to dominate the land. Geology School Keywords Skip footer navigational links InfoBank   Menlo Park & Santa Cruz Centers   St. Petersburg Center   Woods Hole Center   Coastal and Marine Geology Program   Geologic Information   Ask-A-Geologist   USGS Disclaimer

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U.S. Department of the Interior | U.S. Geological Survey URL: http://walrus.wr.usgs.gov/infobank/programs/html/school/moviepage/10.01.19.html Page Contact: InfoBank staff Page Last Modified: Fri Sep 18 02:36:45 PDT 2009  (wcs)