United States Geological Survey Yearbook

activities Administration agencies analysis areas assessment Assistant associated Authority Award basin Board Bureau cartographic caused Chief City City of w climate collected Commission concentrations conducted Conservation contamination continued Control cooperative County data base Department deposits distribution District District w Division Earth Science earthquake effects effort energy environment Environmental existing Federal feet field Figure flow geographic global Government ground water ground-water hazards hydrologic identify increase International Lake land located major Management maps measured ment miles million mineral National Center natural needs occur Office Operations organic Park percent Planning present processes Public regional requirements River rocks samples scale scientific scientists sediment Service soils sources South standard Stop studies surface tion Transportation U.S. Geological Survey understanding United University USGS Volcano Water Resources wetlands