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“usgs”
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astrogeology.usgs.gov
USGS Astrogeology Science Center
Home page for the USGS Astrogeology Science Center, featuring planetary imagery, research, GIS, mapping, and image processing software
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chesapeake.usgs.gov
USGS Chesapeake Bay Activities Home Page
USGS Chesapeake Bay Activities provides information on the science activities and research by the U.S. Geological Survey to provide integrated science to support effective ecosystem conservation and restoration in the Chesapeake Bay watershed
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ne.water.usgs.gov
USGS Nebraska Water Science Center
Home page of the USGS Nebraska Water Science Center. Information about Nebraska's surface-water and groundwater resources, and about water quality in Nebraska
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nd.water.usgs.gov
USGS North Dakota Water Science Center
The USGS describes North Dakota's water resources in research and hydrologic studies with hydrologic data and geologic data. These data and studies are used to provide flood warnings and forecasts and many other public serivces
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ngmdb.usgs.gov
USGS NATIONAL GEOLOGIC MAP DATABASE - HOMEPAGE
USGS National Geologic Map Database