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10895 results.

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Page 75, results 1851 - 1875

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Use of a Numerical Model to Simulate the Hydrologic System and Transport of Contaminants Near Joint Base Cape Cod, Western Cape Cod, Massachusetts
Donald A. Walter, Timothy D. McCobb, Michael N. Fienen
2019, Scientific Investigations Report 2018-5139
Historical training and operational activities at Joint Base Cape Cod (JBCC) on western Cape Cod, Massachusetts, have resulted in the release of contaminants into an underlying glacial aquifer that is the sole source of water to the surrounding communities. Remedial systems have been installed to contain and remove contamination from...
Birth and evolution of the Virgin River fluvial system: ∼1 km of post–5 Ma uplift of the western Colorado Plateau
Cory Walk, Karl Karlstrom, Ryan S. Crow, Matt Heizler
2019, Geosphere (15) 759-782
The uplift history of the Colorado Plateau has been debated for over a century with still no unified hypotheses for the cause, timing, and rate of uplift. 40Ar/39Ar and K/Ar dating of recurrent basaltic volcanism over the past ∼6 Ma within the Virgin River drainage system, southwest Utah, northwest Arizona, and...
Carbon dioxide enhanced oil recovery and residual oil zone studies at the U.S. Geological Survey
Peter D. Warwick, Emil D. Attanasi, Madalyn S. Blondes, Sean T. Brennan, Marc L. Buursink, Colin A. Doolan, Philip A. Freeman, Hossein Jahediesfanjani, C. Ozgen Karacan, Celeste D. Lohr, Matthew D. Merrill, Ricardo A. Olea, Jacqueline N. Roueche, Jenna L. Shelton, Ernie Slucher, Brian A. Varela, Mahendra K. Verma
2019, Conference Paper
The U.S. Geological Survey (USGS) is preparing a national resource assessment of the potential hydrocarbons recoverable after injection of carbon dioxide (CO2) into conventional oil reservoirs in the United States. The implementation of CO2-enhanced oil recovery (CO2-EOR) techniques can increase hydrocarbon production, and lead to incidental retention of CO2 in...
Eastern Carpenter Bee (Hymenoptera: Apidae): Nest structure, nest cell provisions, and trap nest acceptance in Rhode Island
Sara K Tucker, Howard S. Ginsberg, Steven R. Alm
2019, Environmental Entomology (48) 702-710
Analysis of pollen provisions in Xylocopa virginica (L.) nests in southern Rhode Island showed that this species produced pollen loaves from 21 different genera of plants in 2016, 19 in 2017, and 39 in 2018. Antirrhinium majus L. (garden snapdragon) pollen was the most common type collected in all three years (21.4%). Overall, wind-pollinated...
Stratigraphic and structural relations in trench exposures and geomorphology at the Big Burn, Lily Lake, and Lester Ranch sites, Bear River Fault Zone, Utah and Wyoming
Suzanne Hecker, Christopher DuRoss, David P. Schwartz, Francesca R. Cinti, Riccardo Civico, William R. Lund, Adam I. Hiscock, Michael W. West, Tarka Wilcox, Alivia R. Stoller
2019, Scientific Investigations Map 3430
This report provides trench photomosaics, logs and related site information, age data, and earthquake event evidence from three paleoseismic trench sites on the Bear River Fault Zone. Our motivation for studying the Bear River Fault Zone—a nascent normal fault in the Rocky Mountains east of the Basin and Range physiographic...
Three-dimensional basin and fault structure from a detailed seismic velocity model of Coachella Valley, Southern California
Rasheed Ajala, Patricia Persaud, Joann M. Stock, Gary S. Fuis, John A. Hole, Mark Goldman, Daniel S. Scheirer
2019, Journal of Geophysical Research (124) 4728-4750
The Coachella Valley in the northern Salton Trough is known to produce destructive earthquakes, making it a high seismic hazard area. Knowledge of the seismic velocity structure and geometry of the sedimentary basins and fault zones is required to improve earthquake hazard estimates in this region. We simultaneously inverted first...
Spatial and Temporal Patterns of Best Management Practice Implementation in the Chesapeake Bay Watershed, 1985–2014
Andrew J. Sekellick, Olivia H. Devereux, Jennifer L. D. Keisman, Jeffrey S. Sweeney, Joel D. Blomquist
2019, Scientific Investigations Report 2018-5171
Efforts to restore water quality in Chesapeake Bay and its tributaries often include extensive Best Management Practice (BMP) implementation on agricultural and developed lands. These BMPs include a variety of methods to reduce nutrient and sediment loads, such as cover crops, conservation tillage, urban filtering systems, and other practices.Estimates of...
Establishing an Agassiz’s Desert Tortoise monitoring program within the Coachella Valley multiple species habitat conservation plan area: Final report to the Coachella Valley conservation commission on work performed near the Orocopia Mountains
Jeffrey E. Lovich, Shellie R. Puffer, Kristy L. Cummings
2019, Book chapter, 2019 Annual Report: Coachella Valley multiple species conservation plan/natural community conservation plan
In support of the goals of the Coachella Valley Multiple Species Habitat Conservation Plan and Natural Community Conservation Plan (CVMSHCP/NCCP), a population of Agassiz’s desert tortoises (Gopherus agassizii) was marked and studied to establish a desert tortoise monitoring program near the Orocopia Mountains beginning in early 2017 and ending in...
Hurricane Sandy impacts on coastal wetland resilience
Donald R. Cahoon, Jennifer H. Olker, Alice G. Yeates, Glenn R. Guntenspergen, James B. Grace, Susan C. Adamowicz, Shimon C. Anisfeld, Andrew H. Baldwin, Nels Barrett, Leah Beckett, Alice Benzecry, Linda K. Blum, David M. Burdick, William Crouch, Marci Cole Ekberg, Sarah Fernald, Kristin Wilson Grimes, Joseph Grzyb, Ellen Kracauer Hartig, Danielle A. Kreeger, Marit Larson, Scott Lerberg, James C. Lynch, Nicole Maher, Martha Maxwell-Doyle, Laura R. Mitchell, Jordan Mora, Victoria O’Neill, Angela Padeletti, Diann J. Prosser, Tracy Quirk, Kenneth B. Raposa, William G. Reay, Drexel Siok, Christopher Snow, Adam Starke, J. Court Stevenson, Lorie Staver, Vincent Turner
2019, Open-File Report 2018-1142
The goal of this research was to evaluate the impacts of Hurricane Sandy on surface elevation trends in estuarine marshes located across the northeast region of the United States from Virginia to Maine using data from an opportunistic (in other words, not strategic) and collaborative network (from here on, an...
Annual survival, site fidelity, and longevity in the eastern coastal population of the Painted Bunting (Passerina ciris) based on a 20-year mark-recapture/resighting study
Paul W. Sykes, Mary Freeman, Joan J. Sykes, John T. Seginak, M. David Oleyar, Joshua P. Egan
2019, Wilson Journal of Ornithology (131) 96-110
A long-term study of annual survival, longevity, and site fidelity in the eastern coastal population of the Painted Bunting (Passerina ciris) during the breeding season was conducted from 1999 through 2018 in the outer coastal plain of the southeastern Atlantic coast of the United States. Painted Buntings were uniquely color-banded...
The complex spatial distribution of trichloroethene and the probability of NAPL occurrence in the rock matrix of a mudstone aquifer
Allen M. Shapiro, Daniel J. Goode, Thomas E. Imbrigiotta, Michelle M. Lorah, Claire R. Tiedeman
2019, Journal of Contaminant Hydrology (233)
Methanol extractions for chloroethene analyses are conducted on rock samples from seven closely spaced coreholes in a mudstone aquifer that was subject to releases of the nonaqueous phase liquid (NAPL) form of trichloroethene (TCE) between the 1950's and 1990's. Although TCE concentration in the rock matrix over the length of coreholes is dictated by proximity to subhorizontal bedding planefractures, elevated TCE concentrations in...
The Value of Data – The Qatar Geologic Mapping Project
Joseph T. Krupansky, Michael A. Knight, Randall Orndorff, Khaled M. Al-Akhras, Ara G. Mouradian, Ali F. Saleh
2019, Conference Paper, Geotechnical Special Publication
The State of Qatar is in a period of rapid development, modernization, and population growth. One of the most important factors influencing the long-term success and sustainability of future development is a comprehensive understanding of the region’s geologic regime, geotechnical conditions, natural resources, and environmental constraints. To obtain this...
Quantifying hydrologic alteration in an area lacking current reference conditions—The Mississippi Alluvial Plain of the South-Central U.S.
Rheannon M. Hart, Brian Breaker
2019, River Research and Applications (35) 553-565
To better understand the effects of hydrologic alteration as they relate to human and biological needs within the Mississippi Alluvial Plain of the south-central United States, the quantification of hydrologic alteration is required. Quantifying hydrologic alteration in the Mississippi Alluvial Plain is particularly difficult because of the lack of current...
Perfluoroalkyl contaminant exposure in tree swallows nesting at Clarks Marsh, Oscoda, Michigan, USA
Christine M. Custer, Thomas W. Custer, Robert Delaney, Paul M. Dummer, Sandra L. Schultz, Natalie Karouna-Renier
2019, Archives of Environmental Contamination and Toxicology (77) 1-13
A site in north eastern Michigan, Oscoda Township, has some of the highest recorded exposure in birds to perfluorinated substances (PFASs) in the U.S. Some egg and plasma concentrations at that location exceeded the lowest reproductive effect threshold established for two avian laboratory species. The objectives of this...
Topographic drivers of flight altitude over large spatial and temporal scales
Adam E. Duerr, Tricia A. Miller, Leah Dunn, Douglas A. Bell, Peter H. Bloom, Robert N. Fisher, Jeff A. Tracey, Todd E. Katzner
2019, The Auk (136)
Bird movements vary spatially and temporally, but the primary drivers that explain such variation can be difficult to identify. For example, it is well known that the availability of updraft influences soaring flight and that topography interacts with weather to produce these updrafts. However, the influences of topography on flight...
Effects of historic wildfire and prescribed fire on site occupancy of bats in Shenandoah National Park, Virginia, USA
W. Mark Ford, Lauren V. Austin, Alexander Silvis, Karen E. Powers
2019, Journal of Forestry Research (31) 1255-1270
Given high likelihood of regional extirpation of several once-common bat species in eastern North America from White-nose Syndrome, it is critical that impacts of forest management activities such as prescribed fire are known to minimize potentially additive negative effects on bat populations. Historic wildfires may offer a suitable surrogate to...
Environmental and geomorphological changes on the eastern North American Continental Shelf across the Paleocene-Eocene Boundary
Marci M. Robinson, Whittney Spivey
2019, Paleoceanography and Paleoclimatology (34) 715-732
Foraminiferal evidence from two sites in southern Maryland, eastern United States, reveals a series of rapid ecological changes on the continental shelf during the onset of the Paleocene-Eocene Thermal Maximum (PETM). Benthic and planktic foraminifer assemblages from the South Dover Bridge (SDB) and Mattawoman Creek-Billingsley Road (MCBR) cores in the...
Quaternary eolian sediments and Carolina Bays of the U.S. Atlantic Coastal Plain province
Christopher S. Swezey
2019, Conference Paper
Under modern conditions, the Atlantic Coastal Plain province of the eastern United States is not very conducive to widespread eolian sediment mobilization because of a humid and mesothermal climate, relatively low mean surface wind velocities (~1–3 m/sec), and relatively dense vegetation. LiDAR data, however, have revealed the presence of...
Geologic map of the central-southeast flank of Mauna Loa Volcano, Island of Hawaii, Hawaii
Frank A. Trusdell, John P. Lockwood
2019, Scientific Investigations Map 2932-B
Mauna Loa, the largest volcano on Earth, has erupted 33 times since written descriptions became available in 1832. Some eruptions began with only brief seismic unrest, while others followed several months to a year of increased seismicity. Once underway, its eruptions can produce lava flows that may reach the sea...
Geology of the Mineral and Lake Anna West Quadrangles, Virginia
Mark W. Carter, William C. Burton, Ryan J. McAleer, Mary DiGiacomo-Cohen, R. Tyler Sauer
2019, Virginia Division of Geology and Mineral Resources Publication 189
This map product is a cooperator series publication and, as such, does not have a specific abstract. Geologic mapping for this map product was completed between 2014 and 2017, with most of the field work occurring between January 2016 and May 2017. Numerous foot traverses were completed along creeks and roads...
Optimal timing of high-flow experiments for sandbar deposition
David J. Topping, Paul E. Grams, Ronald E. Griffiths, Joseph E. Hazel Jr., Matthew Kaplinski, David J. Dean, Nicholas Voichick, Joel A. Unema, Thomas A. Sabol
2019, Conference Paper, High-Flow Experiments Assessment Extended Abstracts
Sediment-transport theory and field measurements indicate that the greatest or most efficient deposition of sand in eddies occurs during controlled floods (a.k.a. High-Flow Experiments or HFEs) when the greatest amount of the finest sand is available on the bed of the Colorado River (Topping and others, 2010). Conducting HFEs when...
Results from the Department of the Interior Strategic Sciences Group Technical Support for the 2018 Kīlauea Eruption
K. A. Ludwig, Alice Pennaz, Aleeza Wilkins
2019, Report
On May 3, 2018 Hawai'i’s Kīlauea volcano erupted, ultimately covering 35 square kilometers (13.5 square miles) of land in lava, destroying over 700 homes in multiple subdivisions, and displacing over 2500 residents in the Puna District on the southeast flank of the volcano. Simultaneously, Kīlauea’s summit experienced its largest collapse...
The application of oyster reefs in shoreline protection: Are we over‐engineering for an ecosystem engineer?
R. L. Morris, D. M. Bilkovic, M. K. Boswell, D. Bushek, J. Cebrian, Josh Goff, K. M. Kibler, Megan K. LaPeyre, G. McClenachan, J. A. Moody, P. E. Sacks, J.P. Shinn, E. L. Sparks, N. A. Temple, L. J. Walters, B. M. Webb, S. E. Swearer
2019, Journal of Applied Ecology (56) 1703-1711
Oyster reef living shorelines have been proposed as an effective alternative to traditional coastal defence structures (e.g. bulkheads, breakwaters), with the benefit that they may keep pace with sea‐level rise and provide co‐benefits, such as habitat provision. However, there remains uncertainty about the effectiveness of shoreline protection provided by...
Syn-collisional exhumation of hot middle crust in the Adirondack Mountains (New York, USA): Implications for extensional orogenesis in the southern Grenville province
Sean Regan, Gregory J. Walsh, Michael L. Williams, Jeffrey R. Chiarenzelli, Megan E. Toft, Ryan J. McAleer
2019, Geosphere (15) 1-22
Extensional deformation in the lower to middle continental crust is increasingly recognized and shown to have significant impact on crustal architecture, magma emplacement, fluid flow, and ore deposits. Application of the concept of extensional strain to ancient orogenic systems, like the Grenville province of eastern North America, has helped decipher the structural evolution of...