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USGS CMG InfoBank Geology School: ecological balance 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       Title Comment Keywords Dust Bowl 20:49 - 21:42 (00:53) / 1.1 MB desertification, desert, "United States", "Great Plains", "ecological balance", rainfall, plant, agriculture, grazing, soil, drought, "dust bowl", "soil conservation" 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/keypage/ecologi.html Page Contact: InfoBank staff Page Last Modified: Wed Jun 17 04:58:13 PDT 2009  (wcs)