The aeromagnetic method as a tool to identify Cenozoic magmatism in the West Antarctic Rift System beneath the West Antarctic Ice Sheet: a review; Thiel subglacial volcano as possible source of the ash layer in the WAISCOR
John C. Behrendt
2013, Tectonophysics (585) 124-136
The West Antarctic Ice Sheet (WAIS) flows through the volcanically active West Antarctic Rift System (WARS). The aeromagnetic method has been the most useful geophysical tool for identification of subglacial volcanic rocks, since 1959–64 surveys, particularly combined with 1978 radar ice-sounding. The unique 1991–97 Central West Antarctica (CWA) aerogeophysical survey...
Observations of the northern seasonal polar cap on Mars: I. Spring sublimation activity and processes
C.J. Hansen, Shane Byrne, Ganna Portyankina, Mary C. Bourke, Colin M. Dovichin, Alfred S. McEwen, Michael T. Mellon, Antoine Pommerol, N. Thomas
2013, Icarus (225) 881-897
Spring sublimation of the seasonal CO2 northern polar cap is a dynamic process in the current Mars climate. Phenomena include dark fans of dune material propelled out onto the seasonal ice layer, polygonal cracks in the seasonal ice, sand flow down slipfaces, and outbreaks of gas and sand around the...
Crater-based dating of geological units on Mars: methods and application for the new global geological map
Thomas Platz, Gregory Michael, Kenneth L. Tanaka, James A. Skinner, Corey M. Fortezzo
2013, Icarus (225) 806-827
The new, post-Viking generation of Mars orbital imaging and topographical data provide significant higher-resolution details of surface morphologies, which induced a new effort to photo-geologically map the surface of Mars at 1:20,000,000 scale. Although from unit superposition relations a relative stratigraphical framework can be compiled, it was the ambition of...
Optical techniques for the determination of nitrate in environmental waters: Guidelines for instrument selection, operation, deployment, maintenance, quality assurance, and data reporting
Brian A. Pellerin, Brian A. Bergamaschi, Bryan D. Downing, John Franco Saraceno, Jessica D. Garrett, Lisa D. Olsen
2013, Techniques and Methods 1-D5
The recent commercial availability of in situ optical sensors, together with new techniques for data collection and analysis, provides the opportunity to monitor a wide range of water-quality constituents on time scales in which environmental conditions actually change. Of particular interest is the application of ultraviolet (UV) photometers for in...
Seasonal changes in peatland surface elevation recorded at GPS stations in the Red Lake Peatlands, northern Minnesota, USA
A.S. Reeve, P.H. Glaser, Donald O. Rosenberry
2013, Journal of Geophysical Research: Biogeosciences (118) 1616-1626
Northern peatlands appear to hold large volumes of free‐phase gas (e.g., CH4 and CO2), which has been detected by surface deformations, pore pressure profiles, and electromagnetic surveys. Determining the gas content and its impact in peat is challenging because gas storage depends on both the elastic properties of the peat...
Implications for late Grenvillian (Rigolet phase) construction of Rodinia using new U-Pb data from the Mars Hill terrane, Tennessee and North Carolina, United States
John N. Aleinikoff, Scott Southworth, Arthur J. Merschat
2013, Geology (41) 1087-1090
New data for zircon (external morphology, cathodoluminescence zoning, and sensitive high resolution ion microprobe [SHRIMP] U-Pb ages) from the Carvers Gap granulite gneiss of the Mars Hill terrane (Tennessee and North Carolina, United States) require reevaluation of interpretations of the age and origin of this rock. The new results indicate...
Monitoring intensity and patterns of off-highway vehicle (OHV) use in remote areas of the western USA
Douglas S. Ouren, Alisa W. Coffin
2013, Oecologia Australis (17) 96-110
The continued growth of off-highway vehicle (OHV) activities – demonstrated by the dramatic increase in OHV sales, number of users, and areas experiencing OHV use – has elevated concerns about their ecological effects, the impacts on wildlife, and the sustainability of OHV use on secondary and tertiary road networks. Conflicts...
Publications of the Volcano Hazards Program 2011
Manuel Nathenson
2013, Open-File Report 2013-1164
The Volcano Hazards Program of the U.S. Geological Survey (USGS) is part of the Geologic Hazards Assessments subactivity, as funded by Congressional appropriation. Investigations are carried out by the USGS and with cooperators at the Alaska Division of Geological and Geophysical Surveys, University of Alaska Fairbanks Geophysical Institute, University of...
Parasitic infection by larval helminths in Antarctic fishes: pathological changes and impact on the host body condition index
Mario Santoro, Simonetta Mattiucci, Thierry M. Work, Roberta Cimmaruta, Valentina Nardi, Paolo Cipriani, Bruno Bellisario, Giuseppe Nascetti
2013, Diseases of Aquatic Organisms (105) 139-148
We examined pathological changes and relationship between body condition index (BCI) and parasitic infection in 5 species of fish, including 42 icefish Chionodraco hamatus (Channichtyidae), 2 dragonfish Cygnodraco mawsoni (Bathydraconidae), 30 emerald rock cod Trematomus bernacchii, 46 striped rock cod T. hansoni and 9 dusty rock cod T. newnesi (Nototheniidae)...
Introduction to the fifth Mars Polar Science special issue: key questions, needed observations, and recommended investigations
Stephen M. Clifford, Kenji Yoshikawa, Shane Byrne, William Durham, David Fisher, Francois Forget, Michael Hecht, Peter Smith, Leslie Tamppari, Timothy Titus, Richard Zurek
2013, Icarus (225) 864-868
The Fifth International Conference on Mars Polar Science and Exploration – which was held from September 12–16, 2011, at the Pike’s Waterfront Lodge in Fairbanks, Alaska – is the latest in a continuing series of meetings that are intended to promote the exchange of knowledge and ideas between planetary and...
Dynamics of mangrove-marsh ecotones in subtropical coastal wetlands: fire, sea-level rise, and water levels
Thomas J. Smith III, Ann M. Foster, Ginger Tiling-Range, John W. Jones
2013, Fire Ecology (9) 66-77
Ecotones are areas of sharp environmental gradients between two or more homogeneous vegetation types. They are a dynamic aspect of all landscapes and are also responsive to climate change. Shifts in the position of an ecotone across a landscape can be an indication of a changing environment. In the coastal...
EAARL coastal topography and imagery–Western Louisiana, post-Hurricane Rita, 2005: First surface
Jamie M. Bonisteel-Cormier, Wayne C. Wright, Xan Fredericks, Emily S. Klipp, Doug B. Nagle, Asbury H. Sallenger Jr., John Brock
2013, Data Series 720
These remotely sensed, geographically referenced color-infrared (CIR) imagery and elevation measurements of lidar-derived first-surface (FS) topography datasets were produced by the U.S. Geological Survey (USGS), St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida, and the National Aeronautics and Space Administration (NASA), Wallops Flight Facility, Virginia. This project...
Thermokarst and thaw-related landscape dynamics -- an annotated bibliography with an emphasis on potential effects on habitat and wildlife
Benjamin M. Jones, Courtney L. Amundson, Joshua C. Koch, Guido Grosse
2013, Open-File Report 2013-1161
Permafrost has warmed throughout much of the Northern Hemisphere since the 1980s, with colder permafrost sites warming more rapidly (Romanovsky and others, 2010; Smith and others, 2010). Warming of the near-surface permafrost may lead to widespread terrain instability in ice-rich permafrost in the Arctic and the Subarctic, and may result...
Quality-assurance plan for groundwater activities, U.S. Geological Survey, Washington Water Science Center
Mark D. Kozar, Sue C. Kahle
2013, Open-File Report 2013-1151
This report documents the standard procedures, policies, and field methods used by the U.S. Geological Survey’s (USGS) Washington Water Science Center staff for activities related to the collection, processing, analysis, storage, and publication of groundwater data. This groundwater quality-assurance plan changes through time to accommodate new methods and requirements developed...
Reconnaissance geologic map of the Kuskokwim Bay region, southwest Alaska
Frederic H. Wilson, Chad P. Hults, Solmaz Mohadjer, Warren L. Coonrad
2013, Scientific Investigations Map 3100
The rocks of the map area range from Proterozoic age metamorphic rocks of the Kanektok metamorphic complex (Kilbuck terrane) to Quaternary age mafic volcanic rocks of Nunivak Island. The map area encompasses much of the type area of the Togiak-Tikchik Complex. The geologic maps used to construct this compilation were,...
Modeling prey consumption by native and non-native piscivorous fishes: implications for competition and impacts on shared prey in an ultraoligotrophic lake in Patagonia
Romina Juncos, David A. Beauchamp, Pablo H. Viglianoc
2013, Transactions of the American Fisheries Society (142) 268-281
We examined trophic interactions of the nonnative salmonids Rainbow Trout Oncorhynchus mykiss, Brown Trout Salmo trutta, and Brook Trout Salvelinus fontinalisand the main native predator Creole Perch Percichthys trucha in Lake Nahuel Huapi (Patagonia, Argentina) to determine the relative impact of each predator on their forage base and to evaluate...
Applying UV cameras for SO2 detection to distant or optically thick volcanic plumes
Christoph Kern, Cynthia Werner, Tamar Elias, A. Jeff Sutton, Peter Lübcke
2013, Journal of Volcanology and Geothermal Research (262) 80-89
Ultraviolet (UV) camera systems represent an exciting new technology for measuring two dimensional sulfur dioxide (SO2) distributions in volcanic plumes. The high frame rate of the cameras allows the retrieval of SO2 emission rates at time scales of 1 Hz or higher, thus allowing the investigation of high-frequency signals and...
Presence of indicator plant species as a predictor of wetland vegetation integrity
Martin A. Stapanian, Jean V. Adams, Brian Gara
2013, Plant Ecology (214) 291-302
We fit regression and classification tree models to vegetation data collected from Ohio (USA) wetlands to determine (1) which species best predict Ohio vegetation index of biotic integrity (OVIBI) score and (2) which species best predict high-quality wetlands (OVIBI score >75). The simplest regression tree model predicted OVIBI score based...
Reappraisal of the relationship between the northern Nevada rift and Miocene extension in the northern Basin and Range Province
Joseph P. Colgan
2013, Geology (41) 211-214
The northern Nevada rift is a prominent mafic dike swarm and magnetic anomaly in north-central Nevada inferred to record the Middle Miocene (16.5-15.0 Ma) extension direction in the northern Basin and Range province in the western United States. From the 245°-250° rift direction, Basin and Range extension is inferred to...
Superimposed extension and shortening in the southern Salinas Basin and La Panza Range, California: A guide to Neogene deformation in the Salinian block of the central California Coast Ranges
Joseph P. Colgan, Darcy McPhee, Kristin McDougall, Jeremy K. Hourigan
2013, Lithosphere (4) 29-48
We synthesized data from geologic maps, wells, seismic-reflection profiles, potential-field interpretations, and low-temperature thermochronology to refine our understanding of late Cenozoic extension and shortening in the Salinian block of the central California Coast Ranges. Data from the La Panza Range and southern Salinas Basin document early to middle Miocene extension,...
Streamflow, water quality, and constituent loads and yields, Scituate Reservoir drainage area, Rhode Island, water year 2011
Kirk P. Smith
2013, Open-File Report 2013-1127
Streamflow and concentrations of sodium and chloride estimated from records of specific conductance were used to calculate loads of sodium and chloride during water year (WY) 2011 (October 1, 2010, to September 30, 2011), for tributaries to the Scituate Reservoir, Rhode Island. Streamflow and water-quality data used in the study...
Modeling variably saturated multispecies reactive groundwater solute transport with MODFLOW-UZF and RT3D
Ryan T. Bailey, Eric D. Morway, Richard G. Niswonger, Timothy K. Gates
2013, Ground Water (51) 752-761
A numerical model was developed that is capable of simulating multispecies reactive solute transport in variably saturated porous media. This model consists of a modified version of the reactive transport model RT3D (Reactive Transport in 3 Dimensions) that is linked to the Unsaturated-Zone Flow (UZF1) package and MODFLOW. Referred to...
Potentially induced earthquakes in Oklahoma, USA: links between wastewater injection and the 2011 Mw 5.7 earthquake sequence
Katie M. Keranen, Heather M. Savage, Geoffrey A. Abers, Elizabeth S. Cochran
2013, Geology (41) 699-702
Significant earthquakes are increasingly occurring within the continental interior of the United States, including five of moment magnitude (Mw) ≥ 5.0 in 2011 alone. Concurrently, the volume of fluid injected into the subsurface related to the production of unconventional resources continues to rise. Here we identify the largest earthquake potentially...
Predicting the likelihood of altered streamflows at ungauged rivers across the conterminous United States
Ken Eng, Daren M. Carlisle, David M. Wolock, James A. Falcone
2013, River Research and Applications (29) 781-791
An approach is presented in this study to aid water-resource managers in characterizing streamflow alteration at ungauged rivers. Such approaches can be used to take advantage of the substantial amounts of biological data collected at ungauged rivers to evaluate the potential ecological consequences of altered streamflows. National-scale random forest statistical...
Correlating multispectral imaging and compositional data from the Mars Exploration Rovers and implications for Mars Science Laboratory
Ryan B. Anderson, James F. Bell III
2013, Icarus (223) 157-180
In an effort to infer compositional information about distant targets based on multispectral imaging data, we investigated methods of relating Mars Exploration Rover (MER) Pancam multispectral remote sensing observations to in situ alpha particle X-ray spectrometer (APXS)-derived elemental abundances and Mössbauer (MB)-derived abundances of Fe-bearing phases at the MER field...
