Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16783
Determination of representative uranium and selenium concentrations from groundwater, 2016, Homestake Mining Company Superfund site, Milan, New Mexico
In 2016, the U.S. Geological Survey, in cooperation with the U.S. Environmental Protection Agency, collected data on isotopes, age dating, and geochemistry including aqueous uranium concentrations of samples from 20 locations in the vicinity of the Homestake Mining Company Superfund site near Milan, New Mexico. The 20 sampled locations include 19 groundwater wells and 1 treatment plant for water u
Authors
Philip T. Harte, Johanna M. Blake, Kent Becher
India National Gas Hydrate Program Expedition 02 summary of scientific results: Evaluation of natural gas hydrate-bearing pressure cores
India’s National Gas Hydrate Program (NGHP) Expedition-02 was conducted in 2015 with the goal of investigating numerous locations that had been determined to be prospective for gas hydrate at high saturation in sand-rich reservoirs. Initial logging while drilling data revealed extensive sand-rich gas hydrate occurrences at multiple drill sites in two broad areas. These sites were further investig
Authors
R. Boswell, J. Yoneda, William F. Waite
Evidence for shelf acidification during the onset of the Paleocene-Eocene Thermal Maximum
A transect of paleoshelf cores from Maryland and New Jersey contains a ~0.19 m to 1.61 m thick interval with reduced percentages of carbonate during the onset of the Paleocene-Eocene Thermal Maximum (PETM). Outer paleoshelf cores are barren of nannofossils and correspond to two minor disconformities. Middle paleoshelf cores contain a mixture of samples devoid of nannofossils and those with rare
Authors
Timothy J. Bralower, Lee R. Kump, Marci M. Robinson, Jean Self-Trail, Shelby L. Lyons, Tali Babila, Edward Ballaron, Katherine H. Freeman, Elizabeth A. Hajek, William Rush, James C. Zachos
Critical minerals: A review of elemental trends in comprehensive criticality studies
Mineral criticality is a subjective concept that has evolved throughout history. An abundance of literature on this topic has been published over the last decade, encompassing a variety of criteria and methodologies. To our knowledge, this work is the first large-scale effort to organize and analyze recent comprehensive criticality studies in order to determine if a consensus exists within the glo
Authors
Sarah M. Hayes, Erin A. McCullough
The Central African Republic Diamond Database—A geodatabase of archival diamond occurrences and areas of recent artisanal and small-scale diamond mining
The alluvial diamond deposits of the Central African Republic (CAR) are mined almost exclusively by way of informal artisanal and small-scale mining (ASM) methods. ASM sites range in diameter from a few meters to 30 meters or more, and are typically excavated by crews of diggers using hand tools, sieves, and jigs. CAR’s reported annual production has ranged from 300,000 to 470,000 carats over the
Authors
Jessica D. DeWitt, Peter G. Chirico, Sarah E. Bergstresser, Inga E. Clark
The significance of dinoflagellates in the Miocene Choptank Formation beneath the Midlothian gravels in the southeastern Virginia Piedmont
The Fall Line (formally "Tidewater Fall Line") separates the more resistant igneous, metamorphic, and consolidated sedimentary rocks of the Piedmont from the typically unconsolidated deposits of the Coastal Plain of Virginia. Widespread but now discontinuous patches of a deeply weathered sand and gravel are found west of the Fall Line, capping the highest hilltops. Near the community of Midlothian
Authors
Lucy E. Edwards, Robert E. Weems, Mark W. Carter, David Spears, David S. Powars
An intercomparison of oceanic methane and nitrous oxide measurements
Large-scale climatic forcing is impacting oceanic biogeochemical cycles and is expected to influence the water-column distribution of trace gases, including methane and nitrous oxide. Our ability as a scientific community to evaluate changes in the water-column inventories of methane and nitrous oxide depends largely on our capacity to obtain robust and accurate concentration measurements that can
Authors
Samuel Wilson, Hermann Bange, Damian Arevalo-Martinez, Jonathan Barnes, Alberto V. Borges, Ian Brown, John Bullister, Macarena Burgos, David Capelle, Michael Casso, Mercedes de la Paz, Laura Farias, Lindsay Fenwick, Sara Ferron, Gerardo Garcia, MIchael Glockzin, David Karl, Annette Kock, Sarah Laperriere, Cliff S. Law, Cara Manning, Andrew Marriner, Jukka-Pekka Myllykangas, John Pohlman, Andrew Rees, Allison Santoro, Philippe Tortll, Robert C. Upstill-Goddard, David Wisegarver, Gui-Ling Zhang, Gregor Rehder
Hydrologic characteristics and water quality of headwater streams and wetlands at the Allegheny Portage Railroad National Historic Site, Summit area, Blair and Cambria Counties, Pennsylvania, 2014–16
The Allegheny Portage Railroad National Historic Site (ALPO) in Blair and Cambria Counties, Pennsylvania, protects historic features of the first railroad portage over the Allegheny Front and the first railroad tunnel in the United States. This report, which was completed by the U.S. Geological Survey in cooperation with the National Park Service, summarizes water resources in the headwaters of th
Authors
Charles A. Cravotta, Daniel G. Galeone, Kathy A. Penrod
Climate Assessments and Scenario Planning (CLASP)
The NE CASC boasts an interdisciplinary array of scientists, from ecologists to biologists, hydrologists to climatologists, each contributing new, original academic research to advance our understanding of the impacts of climate change on wildlife and other natural resources in the Northeast. Needed was an outreach specialist who would interface directly with the management agencies who benefited
Authors
Elda Varela Minder, Alexander Bryan
In vivo effects of 17α-ethinylestradiol, 17B-estradiol and 4-nonylphenol on insulin-like growth-factor binding proteins (igfbps) in Atlantic salmon
Feminizing endocrine disrupting compounds (EDCs) affect the growth and development of teleost fishes. The major regulator of growth performance, the growth hormone (Gh)/insulin-like growth-factor (Igf) system, is sensitive to estrogenic compounds and mediates certain physiological and potentially behavioral consequences of EDC exposure. Igf binding proteins (Igfbps) are key modulators of Igf activ
Authors
Jason P. Breves, Tara A. Duffy, Ingibjörg E. Einarsdottir, Björn Thrandur Björnsson, Stephen D. McCormick
Multidirectional abundance shifts among North American birds and the relative influence of multifaceted climate factors
Shifts in species distributions are major fingerprint of climate change. Examining changes in species abundance structures at a continental scale enables robust evaluation of climate change influences, but few studies have conducted these evaluations due to limited data and methodological constraints. In this study, we estimate temporal changes in abundance from North American Breeding Bird Survey
Authors
Qiongyu Huang, John R. Sauer, Ralph O. Dubayah
Observed climate change
As discussed in Chapter 1, climate is one of the principal factors that have determined the composition and extent of forest ecosystems in the Mid-Atlantic region during the past several thousand years. This chapter describes the climate trends in the assessment area that have been observed during the past century, including documented patterns of climate-related processes and extreme weather even
Authors
Patricia R. Butler-Leopold, Louis R. Iverson, Frank R. Thompson, Leslie A. Brandt, Stephen D. Handler, Maria K. Janowiak, P. Danielle Shannon, Christopher W. Swanston, Scott Bearer, Alexander Bryan, Kenneth L. Clark, Greg Czarnecki, Philip DeSenze, William D. Dijak, Jacob S. Fraser, Paul F. Gugger, Andrea Hille, Justin Hynicka, Claire A. Jantz, Matthew C. Kelly, Katrina M. Krause, Inga P. La Puma, Deborah Landau, Richard G. Lathrop, Laura P. Leites, Evan Madlinger, Stephen N. Matthews, Gulnihal Ozbay, Matthew P. Peters, Anantha Prasad, David A. Schmit, Collin Shephard, Rebecca Shirer, Nicholas S. Skowronski, Al Steele, Susan Stout, Melissa Thomas-Van Gundy, John Thompson, Richard M. Turcotte, David A. Weinstein, Alfonso Yáñez