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Resources:
U.S. Geological Survey
USGS is a world leader in the natural sciences. They provide scientific information on transportation, natural resources, geology, weather and topography.
http://www.usgs.gov/
Geologic Hazards
US Geological Survey resources on hazards related to earthquakes, landslides, and geomagnetism.
http://geohazards.cr.usgs.gov/
USGS National Geologic Map Database
Searchable catalog of paper and digital geologic maps, mostly for the U.S. Maps and related data cover: geology, hazards, earth resources, geophysics, geochemistry, geochronology, paleontology, and marine geology.
http://ngmdb.usgs.gov/
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