Geological Survey Bulletin, Ausgaben 1423-1428

activity aeromagnetic altitude andesite Arabian Directorate Gen Basin Behrendt biotite Brazil CA-3 Objective caldera California Principal Contact canyon coastal areas Colombia Continental Shelf County dikes earthquake environmental evaluate faults feet figs Francisco Bay region FY 76 Location geochemical geologic map geophysical Granodiorite ground water ground-water Hayden Valley Hyder Quartz Monzonite hydrologic Internat investigations Kingdom of Saudi late Bull Lake Liberia margin Mineral Resources NR-7 Objective Offshore Ongoing FY 76 Pakistan percent phenocrysts Pinedale plagioclase pluton Quartz Monzonite rainfall reconnaissance rhyolite rhyolite flow rocks samples San Francisco Bay Saudi Arabia Saudi Arabian Directorate scale sedimentary sediments seismic slope Status stratigraphic section studies Surficial Survey Misc Survey open-file rept Survey Prof tables tectonic Texas Creek Texas Creek Granodiorite Title topographic mapping tuff U.S. Geol U.S. Geological Survey units volcanic Wadi Wotorson Yellowstone Lake Yellowstone National Park Yellowstone River