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activities Administration Alaska analysis Assistant Basin Board Bureau California cartographic City coal Colorado Commission contamination Cooperative Coordination data base Denver Department of Public digital cartographic data earth science earthquake energy Environmental eruption evaluation Federal agencies Federal Bldg feet fiscal year 1984 Flood Control flow Franciscan assemblage geographic geologic maps Geologist geophysical ground water ground-water hazards hydrologic Information Systems investigations Irrigation Lake land Landsat Long Valley Caldera major Mammoth Lakes Management Menlo Park ment miles million mineral deposits mineral resources National Center National Mapping Division Office oil and gas Parkfield earthquake percent petroleum photographs Planning potential Puerto Rico quadrangle Regional remote sensing Reston River rocks scientific scientists sediment seismic selenium Service sources square miles STOP studies surface Survey's techniques tion Transportation U.S. Geological Survey Valley Volcano Water Conservation District Water District Water Resources Division zone