Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Results

164468 results.

Alternate formats: RIS file of the first 3000 search results  |  Download all results as CSV | TSV | Excel  |  RSS feed based on this search  |  JSON version of this page of results

Page 1128, results 28176 - 28200

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
Hydrothermal alteration and diagenesis of terrestrial lacustrine pillow basalts: Coordination of hyperspectral imaging with laboratory measurements
Rebecca N Greenberger, John F Mustard, Edward A. Cloutis, Paul Mann, Janette H. Wilson, Roberta L Flemming, Kevin Robertson, Mark R Salvatore, Christopher Edwards
2015, Geochimica et Cosmochimica Acta (171) 174-200
We investigate an outcrop of ∼187 Ma lacustrine pillow basalts of the Talcott Formation exposed in Meriden, Connecticut, USA, focusing on coordinated analyses of one pillow lava to characterize the aqueous history of these basalts in the Hartford Basin. This work uses a suite of multidisciplinary measurements, including hyperspectral...
Ultraviolet vision may be widespread in bats
P. Marcos Gorresen, Paul M. Cryan, David C. Dalton, Sandy Wolf, Frank Bonaccorso
2015, Acta Chiropterologica (17) 193-198
Insectivorous bats are well known for their abilities to find and pursue flying insect prey at close range using echolocation, but they also rely heavily on vision. For example, at night bats use vision to orient across landscapes, avoid large obstacles, and locate roosts. Although lacking sharp visual acuity, the...
Regional seismic-wave propagation from the M5.8 23 August 2011, Mineral, Virginia, earthquake
Frederick Pollitz, Walter D. Mooney
2015, GSA Special Papers (509) 95-116
The M5.8 23 August 2011 Mineral, Virginia, earthquake was felt over nearly the entire eastern United States and was recorded by a wide array of seismic broadband instruments. The earthquake occurred ~200 km southeast of the boundary between two distinct geologic belts, the Piedmont and Blue Ridge terranes to the...
Causes of mortality and temporal patterns in breeding season survival of lesser prairie-chickens in shinnery oak prairies
Blake A. Grisham, Clint W. Boal
2015, Wildlife Society Bulletin (39) 536-542
Baseline survival and mortality data for lesser prairie-chickens (Tympanuchus pallidicinctus) are lacking for shinnery oak (Quercus havardii) prairies. An understanding of the causes and timing of mortalities and breeding season survival in this ecoregion is important because shinnery oak prairies have hotter and drier environmental conditions, as well as different...
A Green's function approach for assessing the thermal disturbance caused by drilling deep boreholes in rock or ice
Gary D. Clow
2015, Geophysical Journal International (203) 1877-1895
A knowledge of subsurface temperatures in sedimentary basins, fault zones, volcanic environments and polar ice sheets is of interest for a wide variety of geophysical applications. However, the process of drilling deep boreholes in these environments to provide access for temperature and other measurements invariably disturbs the temperature field around...
Gold-silver mining districts, alteration zones, and paleolandforms in the Miocene Bodie Hills Volcanic Field, California and Nevada
Peter G. Vikre, David A. John, Edward A. du Bray, Robert J. Fleck
2015, Scientific Investigations Report 2015-5012
The Bodie Hills is a ~40 by ~30 kilometer volcanic field that straddles the California-Nevada state boundary between Mono Lake and the East Walker River. Three precious metal mining districts and nine alteration zones are delineated in Tertiary-Quaternary volcanic and Mesozoic granitic and metamorphic rocks that comprise the volcanic field....
Flood-inundation maps for the Tippecanoe River at Winamac, Indiana
Chad D. Menke, Aubrey R. Bunch
2015, Scientific Investigations Report 2015-5103
Digital flood-inundation maps for a 6.2 mile reach of the Tippecanoe River at Winamac, Indiana (Ind.), were created by the U.S. Geological Survey (USGS) in cooperation with the Indiana Office of Community and Rural Affairs. The flood-inundation maps, which can be accessed through the USGS Flood Inundation Mapping Science Web...
Status report for the 3D Elevation Program, 2013-2014
Vicki Lukas, Diane F. Eldridge, Allyson L. Jason, David L. Saghy, Pamela R. Steigerwald, Jason M. Stoker, Larry J. Sugarbaker, Diana R. Thunen
2015, Open-File Report 2015-1161
The 3D Elevation Program (3DEP) goal is to acquire, manage, and distribute enhanced three-dimensional elevation data for the Nation and U.S. territories by 2023. This status report covers implementation activities during 2013–2014 to include meeting funding objectives, developing a management structure, modernizing systems, and collecting and producing initial 3DEP data...
Comparison of evaporation at two central Florida lakes,
April 2005–November 2007
Amy Swancar
2015, Open-File Report 2015-1075
Evaporation from April 2005 through October 2007 at two central Florida lakes, one close to the Gulf of Mexico and one in the center of the peninsula, was 4.043 and 4.111 meters (m), respectively; evaporation for 2006 was 1.534 and 1.538 m, respectively. Although annual evaporation rates at the two...
Do open access data policies inhibit innovation?
Todd E. Katzner
2015, BioScience (65) 1037-1038
There has been a great deal of attention paid recently to the idea of data sharing (Van Noorden 2014, Beardsley 2015, Nature Publishing Group2015, www.copdess.com). However, the vast majority of these arguments are in agreement and present as fait accompli the idea that data are a...
Accuracy or precision: Implications of sample design and methodology on abundance estimation
Lucas K. Kowalewski, Christopher J. Chizinski, Larkin A. Powell, Kevin L. Pope, Mark A. Pegg
2015, Ecological Modelling (316) 185-190
Sampling by spatially replicated counts (point-count) is an increasingly popular method of estimating population size of organisms. Challenges exist when sampling by point-count method, and it is often impractical to sample entire area of interest and impossible to detect every individual present. Ecologists encounter logistical limitations that force them to...
Role of anaerobic ammonium oxidation (anammox) in nitrogen removal from a freshwater aquifer
Richard L. Smith, John Karl Bohlke, B. Song, C. Tobias
2015, Environmental Science & Technology (49) 12169-12177
Anaerobic ammonium oxidation (anammox) couples the oxidation of ammonium with the reduction of nitrite, producing N2. The presence and activity of anammox bacteria in groundwater were investigated at multiple locations in an aquifer variably affected by a large, wastewater-derived contaminant plume. Anammox bacteria were detected at all locations tested using...
Aleutian basin oceanic crust
Gail L. Christeson, Ginger A. Barth
2015, Earth and Planetary Science Letters (426) 167-175
We present two-dimensional P-wave velocity structure along two wide-angle ocean bottom seismometer profiles from the Aleutian basin in the Bering Sea. The basement here is commonly considered to be trapped oceanic crust, yet there is a change in orientation of magnetic lineations and gravity features within the basin that might...
Early-Holocene warming in Beringia and its mediation by sea-level and vegetation changes
P. J. Bartlein, M. E. Edwards, Steven W. Hostetler, Sarah Shafer, P. M. Anderson, L. B Brubaker, A. V Lozhkin
2015, Climate of the Past (11) 1197-1222
Arctic land-cover changes induced by recent global climate change (e.g., expansion of woody vegetation into tundra and effects of permafrost degradation) are expected to generate further feedbacks to the climate system. Past changes can be used to assess our understanding of feedback mechanisms through a combination of process modeling and...
Aurora painting pays tribute to Civil War's end
Jeffrey J. Love
2015, Eos, Earth and Space Science News
This year marks the sesquicentennial anniversary of the end of the American Civil War, a conflict that Abraham Lincoln called a “mighty scourge.” It was one of the most poignant periods in U.S. history, laying bare political, economic, social, and moral divergence between Northern and Southern states. The cause of...
A new isotopic reference material for stable hydrogen and oxygen isotope-ratio measurements of water—USGS50 Lake Kyoga Water
Tyler B. Coplen, Leonard I Wassenaar, Christine Mukwaya, Haiping Qi, Jennifer M. Lorenz
2015, Rapid Communications in Mass Spectrometry (29) 2078-2082
Rationale As a result of the need for isotopic reference waters having high δ2HVSMOW-SLAP and δ18OVSMOW-SLAP values for daily use, especially for tropical and equatorial-zone freshwaters, a new secondary isotopic reference material for international distribution was prepared from water collected from Lake Kyoga, Uganda. Methods This isotopic reference lakewater was filtered through a membrane with 0.2-µm pore...
Whooping crane stopover site use intensity within the Great Plains
Aaron T. Pearse, David A. Brandt, Wade C. Harrell, Kristine L. Metzger, David M. Baasch, Trevor J. Hefley
2015, Open-File Report 2015-1166
Whooping cranes (Grus americana) of the Aransas-Wood Buffalo population migrate twice each year through the Great Plains in North America. Recovery activities for this endangered species include providing adequate places to stop and rest during migration, which are generally referred to as stopover sites. To assist in recovery efforts, initial...
Effects of land use on lake nutrients: The importance of scale, hydrologic connectivity, and region
Patricia A. Soranno, Kendra Spence Cheruvelil, Tyler Wagner, Katherine E. Webster, Mary Tate Bremigan
2015, PLoS ONE (10) 1-22
Catchment land uses, particularly agriculture and urban uses, have long been recognized as major drivers of nutrient concentrations in surface waters. However, few simple models have been developed that relate the amount of catchment land use to downstream freshwater nutrients. Nor are existing models applicable to large numbers of freshwaters...
Efforts to eradicate yellow crazy ants on Johnston Atoll: Results from Crazy Ant Strike Team IX, December 2014-June 2015
Paul C. Banko, Robert W. Peck, Kevin Donmoyer, Stephan Kropidlowski, Amanda Pollock
2015, Technical Report HCSU-067
The ecologically destructive yellow crazy ant (YCA; Anoplolepis gracilipes) was first detected on Johnston Atoll in January 2010. Within eight months, the U.S. Fish and Wildlife Service had mobilized its first crazy ant strike team (CAST), a group of biologists dedicated to testing and identifying insecticidal baits to be used...
Stream vulnerability to widespread and emergent stressors: a focus on unconventional oil and gas
Sally Entrekin, Kelly O. Maloney, Katherine E. Kapo, Annika W. Walters, Michelle A. Evans-White, Kenneth M. Klemow
2015, PLoS ONE 1-28
Multiple stressors threaten stream physical and biological quality, including elevated nutrients and other contaminants, riparian and in-stream habitat degradation and altered natural flow regime. Unconventional oil and gas (UOG) development is one emerging stressor that spans the U.S. UOG development could alter stream sedimentation, riparian extent and composition, in-stream flow,...
Monitoring ground-surface heating during expansion of the Casa Diablo production well field at Mammoth Lakes, California
D. Bergfeld, R. Greg Vaughan, William C. Evans, Eric Olsen
2015, Conference Paper, Geothermal Resources Council Transactions
The Long Valley hydrothermal system supports geothermal power production from 3 binary plants (Casa Diablo) near the town of Mammoth Lakes, California. Development and growth of thermal ground at sites west of Casa Diablo have created concerns over planned expansion of a new well field and the associated increases in...
A quick SEED tutorial
Adam T. Ringler, John R. Evans
2015, Seismological Research Letters (86) 1717-1725
Introduction A number of different government-funded seismic data centers offer free open-access data (e.g., U.S. Geological Survey, National Earthquake Information Center, the Incorporated Research Institutions for Seismology (IRIS), and Data Management System), which can be freely downloaded and shared among different members of the community (Lay, 2009). To efficiently share...
Groundwater resources of the Columbia Plateau regional aquifer system
Sue C. Kahle, John J. Vaccaro
2015, Fact Sheet 2015-3063
The Columbia Plateau is a wide basalt plateau between the Cascade Range and the Rocky Mountains that covers parts of Washington, Oregon, and Idaho. The climate over much of the Columbia Plateau is semiarid with precipitation ranging from 7 to 15 in/yr in the central part (Vaccaro and others, 2015),...
Groundwater availability of the Columbia Plateau Regional Aquifer System, Washington, Oregon, and Idaho
J. J. Vaccaro, S. C. Kahle, D.M. Ely, E.R. Burns, D.T. Snyder, J.V. Haynes, T. D. Olsen, W.B. Welch, D. S. Morgan
2015, Professional Paper 1817
The Columbia Plateau Regional Aquifer System (CPRAS) covers about 44,000 square miles of southeastern Washington, northeastern Oregon, and western Idaho. The area supports a $6-billion per year agricultural industry, leading the Nation in production of apples, hops, and eight other commodities. Groundwater pumpage and surface-water diversions supply water to croplands...
Organic waste compounds as contaminants in Milwaukee-area streams
Austin K. Baldwin, Steven R. Corsi, Christopher Magruder, Matthew Magruder, Jennifer L. Bruce
2015, Fact Sheet 2015-3056
Organic waste compounds (OWCs) are ingredients and by-products of common agricultural, industrial, and household substances that can contaminate our streams through sources like urban runoff, sewage overflows, and leaking septic systems. To better understand how OWCs are affecting Milwaukee-area streams, the U.S. Geological Survey, in cooperation with the Milwaukee Metropolitan...