Geophysical framework of the Peninsular Ranges batholith—Implications for tectonic evolution and neotectonics
Victoria E. Langenheim, Robert C. Jachens, Carlos Aiken
2014, GSA Memoirs (211) 1-20
The crustal structure of the Peninsular Ranges batholith can be divided geophysically into two parts: (1) a western mafic part that is dense, magnetic, and characterized by relatively high seismic velocities (>6.25 km/s), low heat flow (<60 mW/m2), and relatively sparse seismicity, and (2) an eastern, more felsic part that...
Geophysical interpretation of U, Th, and rare earth element mineralization of the Bokan Mountain peralkaline granite complex, Prince of Wales Island, southeast Alaska
Anne E. McCafferty, Douglas B. Stoeser, Bradley S. Van Gosen
2014, Interpretation (2) SJ47-SJ63
A prospectivity map for rare earth element (REE) mineralization at the Bokan Mountain peralkaline granite complex, Prince of Wales Island, southeastern Alaska, was calculated from high-resolution airborne gamma-ray data. The map displays areas with similar radioelement concentrations as those over the Dotson REE-vein-dike system, which is characterized by moderately high...
Sources and sinks of carbon in boreal ecosystems of interior Alaska: a review
Thomas A. Douglas, Miriam C. Jones, Christopher A. Hiemstra
2014, Elementa: Science of the Anthropocene (2)
Boreal regions store large quantities of carbon but are increasingly vulnerable to carbon loss due to disturbance and climate warming. The boreal region, underlain by discontinuous permafrost, presents a challenging landscape for itemizing current and potential carbon sources and sinks in the boreal soil and vegetation. The roles of fire,...
Petrologic insights into basaltic volcanism at historically active Hawaiian volcanoes
Rosalind T. Helz, David A. Clague, Thomas W. Sisson, Carl R. Thornber
Michael P. Poland, T. Jane Takahashi, Claire M. Landowski, editor(s)
2014, Professional Paper 1801-6
Study of the petrology of Hawaiian volcanoes, in particular the historically active volcanoes on the Island of Hawai‘i, has long been of worldwide scientific interest. When Dr. Thomas A. Jaggar, Jr., established the Hawaiian Volcano Observatory (HVO) in 1912, detailed observations on basaltic activity at Kīlauea and Mauna Loa volcanoes...
One hundred volatile years of volcanic gas studies at the Hawaiian Volcano Observatory
A.J. Sutton, Tamar Elias
Michael P. Poland, T. Jane Takahashi, Claire M. Landowski, editor(s)
2014, Professional Paper 1801-7
The first volcanic gas studies in Hawai‘i, beginning in 1912, established that volatile emissions from Kīlauea Volcano contained mostly water vapor, in addition to carbon dioxide and sulfur dioxide. This straightforward discovery overturned a popular volatile theory of the day and, in the same action, helped affirm Thomas A. Jaggar,...
A global assessment of the conservation status of the American Oystercatcher Haematopus palliatus
Rob Clay, Arne J. Lesterhuis, Shiloh A. Schulte, Stephen Brown, Debra Reynolds, Theodore R. Simons
2014, International Wader Studies (20) 62-82
The American Oystercatcher Haematopus palliatus is the most widely distributed of the four oystercatcher species in the Western Hemisphere. Its range covers almost the entire Atlantic Coast from northeastern United States to southern Argentina; on the Pacific Coast it is found from northern Mexico to central Chile. This assessment covers the entire range of the...
Assessing the importance of terrain parameters on glide avalanche release
Erich H. Peitzsch, Jordy Hendrikx, Daniel B. Fagre
2014, Conference Paper, Proceedings of the International Snow Science Workshop
Glide snow avalanches are dangerous and difficult to predict. Despite recent research there is still a lack of understanding regarding the controls of glide avalanche release. Glide avalanches often occur in similar terrain or the same locations annually and observations suggest that topography may be critical. Thus, to gain an...
Maximizing the social and ecological value of Cape Romain National Wildlife Refuge, South Carolina as the effects of global change processes increase.
Raye Nilius, Sarah Dawsey, Mitchell J. Eaton, Julien Martin, Stephanie S. Romanach, Suzanne Baird, Michael Bryant, David J. Case, Fred A. Johnson, Gerard McMahon, Nancy Pau, Elizabeth Pienaar, Mary Ratnaswamy, Steven Seibert, Pamela Wingrove, Nathan J. Wood
2014, Conference Paper, Structured decision making workshop - Report
Coastal ecosystems in the eastern U.S. have been severely altered by processes associated with human development, including drainage of coastal wetlands, changes in hydrology that alter sediment and freshwater delivery to the coast, land clearing, agricultural and forestry activity, and the construction of seawalls and other structures that “harden” the...
Can managers compensate for coyote predation of white-tailed deer?
Kelly F. Robinson, Duane R. Diefenbach, Angela K. Fuller, Jeremy E. Hurst, Christopher S. Rosenberry
2014, Journal of Wildlife Management (78) 571-579
Many studies have documented that coyotes (Canis latrans) are the greatest source of natural mortality for white-tailed deer (Odocoileus virginianus) neonates (<3 months old). With the range expansion of coyotes eastward in North America, many stakeholders are concerned that coyote predation may be affecting deer populations adversely. We hypothesized that...
Is white-nose syndrome causing insectivory release and altering ecosystem function in the eastern US?
W. Mark Ford, David S. Jachowski, Cahterine M.B. Jachowski
2014, Bat Research News (55) 21-24
No abstract available....
Volcanoes of the passive margin: The youngest magmatic event in eastern North America
Sarah E Mazza, Esteban Gazel, Elizabeth A Johnson, Michael J. Kunk, Ryan J. McAleer, James A Spotila, Michael Bizimis, Drew S Coleman
2014, Geology (42) 483-486
The rifted eastern North American margin (ENAM) provides important clues to the long-term evolution of continental margins. An Eocene volcanic swarm exposed in the Appalachian Valley and Ridge Province of Virginia and West Virginia (USA) contains the youngest known igneous rocks in the ENAM. These magmas provide the only window...
Quaternary geology of the Boston area: Glacial events from Lake Charles to Lake Aberjona
Byron D. Stone, John W. Lane Jr.
2014, Book chapter, 2014 Guidebook for Field Trips in Southeastern New England
The multiple-glacial and glaciomarine Quaternary history of the Boston, Massachusetts area has been known generally since the earliest studies of the then newly recognized glacial deposits described by Prof. Louis Agassiz in the late1840’s and fossil marine shells in the drift in the 1850’s. Attention then turned to possible glacial...
Micro-seismicity and seismic moment release within the Coso Geothermal Field, California
J. Ole Kaven, Stephen H. Hickman, Nicholas C. Davatzes
2014, Conference Paper, Proceedings, Thirty-Ninth Workshop on Geothermal Reservoir Engineering
We relocate 16 years of seismicity in the Coso Geothermal Field (CGF) using differential travel times and simultaneously invert for seismic velocities to improve our knowledge of the subsurface geologic and hydrologic structure. We expand on our previous results by doubling the number of relocated events from April 1996 through...
A multiple-tracer approach to understanding regional groundwaterflow in the Snake Valley area of the eastern Great Basin, USA
Philip M. Gardner
2014, Applied Geochemistry (45) 33-49
Groundwater in Snake Valley and surrounding basins in the eastern Great Basin province of the western United States is being targeted for large-scale groundwater extraction and export. Concern about declining groundwater levels and spring flows in western Utah as a result of the proposed groundwater withdrawals has led to efforts that have improved...
Postglacial eruptive history, geochemistry, and recent seismicity of Aniakchak volcano, Alaska Peninsula
Charles R. Bacon, Christina A. Neal, Thomas P. Miller, Robert G. McGimsey, Christopher J. Nye
2014, Professional Paper 1810
Aniakchak is a Pleistocene to Holocene composite volcano of the Alaska–Aleutian arc that suffered at least one caldera-forming eruption in postglacial time and last erupted in 1931. The oldest recognized postglacial eruption, Aniakchak I, produced andesite ignimbrite ca. 9,500–7,500 14C yr B.P. Subsequently, a vent northeast of the summit issued dacite–rhyodacite magma...
Meteorological data for selected sites along the Colorado River Corridor, Arizona, 2011-13
Joshua J. Caster, Timothy P. Dealy, Timothy Andrews, Helen C. Fairley, Amy E. East, Joel B. Sankey
2014, Open-File Report 2014-1247
This report presents data from 14 automated weather stations collected as part of an ongoing monitoring program within the Grand Canyon National Park and Glen Canyon Recreation Area along the Colorado River Corridor in Arizona. Weather data presented in this document include precipitation, wind speed, maximum wind gusts, wind direction,...
Modeling uncertainty in coal resource assessments, with an application to a central area of the Gillette coal field, Wyoming
Ricardo A. Olea, James A. Luppens
2014, Scientific Investigations Report 2014-5196
Standards for the public disclosure of mineral resources and reserves do not require the use of any specific methodology when it comes to estimating the reliability of the resources. Unbeknownst to most intended recipients of resource appraisals, such freedom commonly results in subjective opinions or estimations based on suboptimal approaches,...
Digital data for preliminary geologic map of the Mount Hood 30- by 60-minute quadrangle, northern Cascade Range, Oregon
Lina Ma, David R. Sherrod, William E. Scott
2014, Data Series 906
The Mount Hood 30- by 60-minute quadrangle covers the axis and east flank of the Cascade Range in northern Oregon. Its namesake, Mount Hood volcano, dominates the view in the northwest quarter of the quadrangle, but the entire area is underlain by Oligocene and younger volcanic and volcaniclastic rocks of...
Surficial geology and stratigraphy of Pleistocene Lake Manix, San Bernardino County, California
Marith C. Reheis, Joanna R. Redwine, Elmira Wan, John P. McGeehin, D. Paco VanSistine
2014, Scientific Investigations Map 3312
Pluvial Lake Manix and its surrounding drainage basin, in the central Mojave Desert of California, has been a focus of paleoclimate, surficial processes, and neotectonic studies by the U.S. Geological Survey (USGS) since about 2004. The USGS initiated studies of Lake Manix deposits to improve understanding of the paleoclimatic record...
Steady-state numerical groundwater flow model of the Great Basin carbonate and alluvial aquifer system
Lynette E. Brooks, Melissa D. Masbruch, Donald S. Sweetkind, Susan G. Buto
2014, Scientific Investigations Report 2014-5213
This report describes the construction, calibration, evaluation, and results of a steady-state numerical groundwater flow model of the Great Basin carbonate and alluvial aquifer system that was developed as part of the U.S. Geological Survey National Water Census Initiative to evaluate the nation’s groundwater availability. The study area spans 110,000...
Nitrogen speciation and trends, and prediction of denitrification extent, in shallow US groundwater
Stephen R. Hinkle, Anthony J. Tesoriero
2014, Journal of Hydrology (509) 343-353
Uncertainties surrounding nitrogen cycling complicate assessments of the environmental effects of nitrogen use and our understanding of the global carbon–nitrogen cycle. In this paper, we synthesize data from 877 ambient-monitoring wells across the US to frame broad patterns of nitrogen speciation and trends. At these sites, groundwater frequently contains substantial...
National assessment of hurricane-induced coastal erosion hazards: Northeast Atlantic Coast
Justin J. Birchler, Hilary F. Stockdon, Kara S. Doran, David M. Thompson
2014, Open-File Report 2014-1243
Beaches serve as a natural buffer between the ocean and inland communities, ecosystems, and natural resources. However, these dynamic environments move and change in response to winds, waves, and currents. During extreme storms, changes to beaches can be great, and the results are sometimes catastrophic. Lives may be lost, communities...
Predicting spatial and temporal distribution of Indo-Pacific lionfish (Pterois volitans) in Biscayne Bay through habitat suitability modeling
Nicholas A. Bernal, Donald L. DeAngelis, Pamela J. Schofield, Kathleen Sullivan Sealey
2014, Biological Invasions (17) 1603-1614
Invasive species may exhibit higher levels of growth and reproduction when environmental conditions are most suitable, and thus their effects on native fauna may be intensified. Understanding potential impacts of these species, especially in the nascent stages of a biological invasion, requires critical information concerning spatial and temporal distributions of...
A sight "fearfully grand": eruptions of Lassen Peak, California, 1914 to 1917
Michael A. Clynne, Robert L. Christiansen, Peter H. Stauffer, James W. Hendley II, Heather A. Bleick
2014, Fact Sheet 2014-3119
On May 22, 1915, a large explosive eruption at the summit of Lassen Peak, California, the southernmost active volcano in the Cascade Range, devastated nearby areas and rained volcanic ash as far away as 280 miles to the east. This explosion was the most powerful in a series of eruptions...
Mercury and halogens in coal
Allan Kolker, Jeffrey C. Quick
Evan J. Granite, Henry W. Pennline, Constance L. Senior, editor(s)
2014, Book chapter, Mercury control: For coal-derived gas streams
Apart from mercury itself, coal rank and halogen content are among the most important factors inherent in coal that determine the proportion of mercury captured by conventional controls during coal combustion. This chapter reviews how mercury in coal occurs, gives available concentration data for mercury in U.S. and international commercial...
