Publications
Here you will find publications, reports and articles produced by geology, energy, and mineral scientists. For a comprehensive listing of all USGS publications, click the button below.
Filter Total Items: 1349
Mono Lake excursion recorded in sediment of the Santa Clara Valley, California Mono Lake excursion recorded in sediment of the Santa Clara Valley, California
Two intervals recording anomalous paleomagnetic inclinations were encountered in the top 40 meters of research drill hole CCOC in the Santa Clara Valley, California. The younger of these two intervals has an age of 28,090 ± 330 radiocarbon years B.P. (calibrated age ∼32.8 ka). This age is in excellent agreement with the latest estimate for the Mono Lake excursion at the type locality and...
Authors
Edward A. Mankinen, Carl M. Wentworth
A new species of Dyoros (Brachiopoda; Chonetoidea) from Nevada (United States) and stratigraphic implications for the Pennsylvanian and Permian Antler Overlap assemblage [Une nouvelle espèce de Dyoros (Brachiopoda; Chonetoidea) du Nevada (États-Unis) et i A new species of Dyoros (Brachiopoda; Chonetoidea) from Nevada (United States) and stratigraphic implications for the Pennsylvanian and Permian Antler Overlap assemblage [Une nouvelle espèce de Dyoros (Brachiopoda; Chonetoidea) du Nevada (États-Unis) et i
Newly discovered fossil localities in coarse-grained deposits of the Pennsylvanian and Permian Antler overlap assemblage in the southern Shoshone Range, north-central Nevada have yielded a low-diversity assemblage consisting chiefly of a new species of chonetoidean brachiopod: Dyoros (Lissosia) nevadaensis nov. sp. The subgenus Dyoros (Lissosia), is known from Leonardian and lower...
Authors
Patrick R. Racheboeuf, Thomas E. Moore, Robert B. Blodgett
Simulation of ventilation efficiency, and pre-closure temperatures in emplacement drifts at Yucca Mountain, Nevada, using Monte Carlo and composite thermal-pulse methods Simulation of ventilation efficiency, and pre-closure temperatures in emplacement drifts at Yucca Mountain, Nevada, using Monte Carlo and composite thermal-pulse methods
Predictions of waste canister and repository driftwall temperatures as functions of space and time are important to evaluate pre-closure performance of the proposed repository for spent nuclear fuel and high-level radioactive waste at Yucca Mountain, Nevada. Variations in the lithostratigraphic features in densely welded and crystallized rocks of the 12.8-million-year-old Topopah Spring...
Authors
J.B. Case, D.C. Buesch
Alaska resource data file, Ruby quadrangle, Alaska Alaska resource data file, Ruby quadrangle, Alaska
No abstract available.
Authors
Cheryl E. Cameron, Garth E. Graham
Alaska resource data file: Tanana quadrangle Alaska resource data file: Tanana quadrangle
No abstract available.
Authors
David J. Szumigala, Garth E. Graham, Jennifer E. Athey
Paleomagnetism and 40Ar/39Ar ages from volcanics extruded during the Matuyama and Brunhes Chrons near McMurdo Sound, Antarctica Paleomagnetism and 40Ar/39Ar ages from volcanics extruded during the Matuyama and Brunhes Chrons near McMurdo Sound, Antarctica
Maps of virtual geomagnetic poles derived from international geomagnetic reference field models show large lobes with significant departures from the spin axis. These lobes persist in field models for the last few millenia. The anomalous lobes are associated with observation sites at extreme southerly latitudes. To determine whether these features persist for millions of years...
Authors
L. Tauxe, Philip B. Gans, Edward A. Mankinen
Photomosaics and logs of trenches on the San Andreas Fault at Mill Canyon near Watsonville, California Photomosaics and logs of trenches on the San Andreas Fault at Mill Canyon near Watsonville, California
We present photomosaics and logs of the walls of trenches excavated for a paleoseismic study at Mill Canyon, one of two sites along the San Andreas fault in the Santa Cruz Mtns. on the Kelley-Thompson Ranch. This site was a part of Rancho Salsipuedes beginning in 1834. It was purchased by the present owner’s family in 1851. Remnants of a cabin/mill operations still exist up the canyon...
Authors
Thomas E. Fumal, Timothy E. Dawson, Rebecca Flowers, John C. Hamilton, Gordon F. Heingartner, James Kessler, Laura Samrad
Rooted Brooks Range ophiolite: Implications for Cordilleran terranes: Comment and Reply Rooted Brooks Range ophiolite: Implications for Cordilleran terranes: Comment and Reply
No abstract available.
Authors
R. Harris, Thomas E. Moore, K.R. Wirth, C. G. Mull
Ophiolite and volcanic arc assemblages on the Vizcaino Peninsula and Cedros Island region, Baja California Sur, Mexico: Mesozoic forearc lithosphere of the Cordilleran magmatic arc Ophiolite and volcanic arc assemblages on the Vizcaino Peninsula and Cedros Island region, Baja California Sur, Mexico: Mesozoic forearc lithosphere of the Cordilleran magmatic arc
Mesozoic ophiolites in the Vizcaíno Peninsula and Cedros Island region of Baja California Sur are suprasubduction zone Cordilleran-type ophiolites structurally juxtaposed with underlying high pressure-temperature subduction complex assemblages. The region is divided into three separate tectonostratigraphic terranes, but here we recognize stratigraphic, intrusive, and petrologie links...
Authors
D.L. Kimbrough, Thomas E. Moore
40Ar/39Ar geochronology of igneous rocks in the Taylor Mountains and Dillingham quadrangles in SW Alaska 40Ar/39Ar geochronology of igneous rocks in the Taylor Mountains and Dillingham quadrangles in SW Alaska
No abstract available.
Authors
Alexander Iriondo, Michael J. Kunk, Frederic H. Wilson
Location and age database for selected foraminifer samples collected by Exxon Petroleum geologists in California Location and age database for selected foraminifer samples collected by Exxon Petroleum geologists in California
Most of the geologic maps published for central California before 1960 were made without the benefit of age determinations from microfossils. The ages of Cretaceous and Tertiary rocks in the mostly poorly exposed and structurally complex sedimentary rocks represented in the Coast Ranges are critical in determining stratigraphic succession or lack of it, and in determining whether the...
Authors
Earl E. Brabb, John M. Parker
By
Hydrogeologic factors that influence ground water movement in the desert southwest United States Hydrogeologic factors that influence ground water movement in the desert southwest United States
A project to study ground-water and surface-water interactions in the desert southwestern United States was initiated in 2001 by the Tucson, Arizona office of the Water Resources Division, U.S. Geological Survey (USGS). One of the goals of the Southwest Ground-water Resources Project was to develop a regional synthesis that includes the use of available digital geologic data, which is...
Authors
Frank C. Chuang, Edwin H. McKee, Keith A. Howard