Guidebook to the geology of four tertiary volcanic centers in central Nevada: Prepared in conjunction with Geological Society of America Cordilleran Section meeting, Las Vegas, Nev., March 1974
Mackay School of Mines, University of Nevada, 1974 - Science - 72 pages
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Northumberland caldera and Northumberland Tuff
Goldfield mining district
1 other sections not shown
adularia argillized rocks ash-flow sheet ash-flow tuff Basalt Black Mountain volcanic breccia Brougher Dacite BulL caldera central Nevada Chispa Columbia Mountain Dacite dips Distance Cumulative mileage east erupted exposed feet FIGURE Fraction Tuff geologic map Gold Flat Member Goldfield Goldfield district Goldfield Hills hydrothermally altered intrusive K-Ar ages Kleinhampl Lander County landslide blocks lavas of Pillar m.y. ago McKee meters miles Milltown Andesite mining district Miocene Mizpah Trachyte Morena Rhyolite Mountain volcanic center Northumberland Northumberland Canyon Northumberland Tuff Nye County Oddie Rhyolite Oligocene outcrops overlies Paleozoic Pillar Spring porphyritic rhyodacite quartz latite quartz monzonite rhyolite road log San Antonio Mountains Sandstorm Formation sedimentary rocks shaft shingle faults Siebert Tuff Silberman silicified zones silver Spearhead Member Tertiary units Tertiary volcanic Thirsty Canyon Tuff tion Tonopah Tonopah district Toquima Range Trachyte Trail Ridge Member U.S. GeoL Survey Vein adularia vein systems volcanic rocks welded tuff western Nevada