Publications
Publications from the staff of the Geology, Minerals, Energy, and Geophysics Science Center
Filter Total Items: 2481
New insights into Arctic paleogeography and tectonics from U-Pb detrital zircon geochronology New insights into Arctic paleogeography and tectonics from U-Pb detrital zircon geochronology
To test existing models for the formation of the Amerasian Basin, detrital zircon suites from 12 samples of Triassic sandstone from the circum-Arctic region were dated by laser ablation-inductively coupled plasma-mass spectrometry (ICP-MS). The northern Verkhoyansk (NE Russia) has Permo-Carboniferous (265-320 Ma) and Cambro-Silurian (410-505 Ma) zircon populations derived via river...
Authors
E. L. Miller, J. Toro, G. Gehrels, J.M. Amato, A. Prokopiev, M.I. Tuchkova, V.V. Akinin, T.A. Dumitru, Thomas E. Moore, M.P. Cecile
Garnet--An Essential Industrial Mineral and January's Birthstone Garnet--An Essential Industrial Mineral and January's Birthstone
Garnet is one of the most common minerals in the world. Occurring in almost any color, it is most widely known for its beauty as a gem stone. Because of its hardness and other properties, garnet is also an essential industrial mineral used in abrasive products, non-slip surfaces, and filtration. To help manage our Nation's resources of such essential minerals, the U.S. Geological Survey...
Authors
James G. Evans, Phillip R. Moyle, David G. Frank, Donald W. Olson
Reply to the discussion by F. Lagroix and S.K. Banerjee of "Geochemical evidence for the origin of late Quaternary loess in central Alaska" Reply to the discussion by F. Lagroix and S.K. Banerjee of "Geochemical evidence for the origin of late Quaternary loess in central Alaska"
No abstract available.
Authors
Daniel R. Muhs, James R. Budahn
Linking middle-school teachers to Earthscope Linking middle-school teachers to Earthscope
EarthScope is a multidisciplinary geophysical investigation of the structure and deformation of the North American continent. Components include a transportable array of digital seismometers (USArray) that will image the continental crust and underlying mantle, and Global Positioning System (GPS) receivers and strainmeters (Plate Boundary Observatory, PBO) that will measure tectonic and...
Authors
R. Butler, E. Bishop, C. Ault, B. Atwater, B. Magura, C. Hedeen, R. Blakely, Ray E. Wells, K. Shay, R. Wagner, T. Southworth-Neumeyer, D. Connor
Ice sheets and sea level: response Ice sheets and sea level: response
No abstract available.
Authors
Jonathan T. Overpeck, Bette L. Otto-Bliesner, Gifford H. Miller, Richard B. Alley, Daniel R. Muhs, Shawn J. Marshall
Birth of the lower Colorado River–Stratigraphic and geomorphic evidence for its inception near the conjunction of Nevada, Arizona, and California Birth of the lower Colorado River–Stratigraphic and geomorphic evidence for its inception near the conjunction of Nevada, Arizona, and California
A detailed record of the late Cenozoic history of the lower Colorado River can be inferred from alluvial and (likely) lacustrine stratigraphy exposed in dissected alluvial basins below the mouth of the Grand Canyon. Numerous sites in Mohave, Cottonwood, and Detrital valleys contain stratigraphic records that directly bear on the mode, timing, and consequences of the river’s inception and
Authors
Kyle House, Keith A. Howard, J. W. Bell, M. E. Perkins, J. E. Faulds, A. Brock
Net dextral slip, Neogene San Gregorio–Hosgri fault zone, coastal California: Geologic evidence and tectonic implications Net dextral slip, Neogene San Gregorio–Hosgri fault zone, coastal California: Geologic evidence and tectonic implications
Reinterpretation of onshore and offshore geologic mapping, examination of a key offshore well core, and revision of cross-fault ties indicate Neogene dextral strike slip of 156 ± 4 km along the San Gregorio–Hosgri fault zone, a major strand of the San Andreas transform system in coastal California. Delineating the full course of the fault, defining net slip across it, and showing its...
Authors
William R. Dickinson, Mihai N. Ducea, Lewis I. Rosenberg, H. Gary Greene, Stephan A. Graham, Joseph C. Clark, Gerald E. Weber, Steven Kidder, W. Gary Ernst, Earl E. Brabb
Assessment of drift stability with consideration of spatial variation of lithophysal cavities at Yucca Mountain Assessment of drift stability with consideration of spatial variation of lithophysal cavities at Yucca Mountain
No abstract available.
Authors
M. Lin, Mark P. Board, D.C. Kicker, J. Leem, B. Damjanac, David C. Buesch
Hydrothermal vent fluids, siliceous hydrothermal deposits, and hydrothermally altered sediments in Yellowstone Lake Hydrothermal vent fluids, siliceous hydrothermal deposits, and hydrothermally altered sediments in Yellowstone Lake
Stable isotopic (dD and d18O) data indicate about 13% total evaporative concentration has occurred in Yellowstone Lake, yet lake waters are enriched in dissolved As, B, Cl, Cs, Ge, Li, Mo, Sb, and W by at least an order-of-magnitude relative to the flow-weighted composition of inflowing streams. We conclude that lake water is a mixture of inflowing surface water and hydrothermal source...
Authors
W. C. Pat Shanks, Lisa Morgan, Laurie S. Balistrieri, Jeffrey C. Alt
Geology of the proposed Yucca Mountain repository site, Nevada Geology of the proposed Yucca Mountain repository site, Nevada
Yucca Mountain, located about 100 miles northwest of Las Vegas, Nevada, has been recommended by the President for a mined geologic repository for high-level radioactive waste. This field trip will examine the geologic and hydrologic setting for Yucca Mountain, as well as specific results of the site characterization program. The field trip will visit the locations for underground in situ...
Authors
John H. Peck, David C. Buesch
Preliminary integrated geologic map databases for the United States - Western states: California, Nevada, Arizona, Washington, Oregon, Idaho, and Utah Preliminary integrated geologic map databases for the United States - Western states: California, Nevada, Arizona, Washington, Oregon, Idaho, and Utah
No abstract available.
Authors
Steve Ludington, Barry C. Moring, Robert J. Miller, Kathryn Flynn, Melanie J. Hopkins, Paul Stone, David R. Bedford, Gordon A. Haxel
Digital-elevation and surface-classification maps of the Fish Creek area, Harrison Bay quadrangle, northern Alaska Digital-elevation and surface-classification maps of the Fish Creek area, Harrison Bay quadrangle, northern Alaska
No abstract available.
Authors
John L. Mars, Christopher P. Garrity, David W. Houseknecht, Lee Amoroso, Donald C. Meares