Abstract:For more information on the USGS-the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment-visit http://www.usgs.gov/ or call 1-888-ASK-USGS (1-888-275-8747).For an overview of USGS information products, including maps, imagery, and publications, visit http://store.usgs.gov.To order this and other USGS information products, visit http://store.usgs.gov/.Any use of trade, firm, or product names is for descriptive purposes only and does not imply endors… Show more
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