United States Geological Survey YearbookThe Survey, 1986 - Geology |
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activities Administration Alaska analysis aquifer system areas assessment Atlantic Coastal Plain Basin boundary California cartographic Central chemical chemical elements Chief Coastal Plain Colorado concentrations contain continental cooperative Coordination County cover mapping crust dams data base Denver Department deposits Division earth science earthquake feet fiscal year 1985 floods Franciscan assemblage geographic geologic mapping Geologist geophysical ground water ground-water hydrologic image maps Information Systems investigations iridium irrigation Lake land cover Landsat landslide major Management manganese mapping projects ment miles Mineral Resources mitigation National Center National Mapping ocean Office oil and gas photographs potential Public quadrangle Raton Basin remote sensing Reston River rocks San Joaquin Valley sand blows scientists sediment sedimentary seismic seismometers selenium Service slope soil sources Stop studies sulfide surface tion topographic U.S. Geological Survey United USGS Valley volcano Water Conservation District Water District water quality Water Resources water-quality zone