Resource potential for commodities in addition to Uranium in sandstone-hosted deposits
George N. Breit
2016, Book chapter, Rare earth and critical elements in ore deposits
Sandstone-hosted deposits mined primarily for their uranium content also have been a source of vanadium and modest amounts of copper. Processing of these ores has also recovered small amounts of molybdenum, rhenium, rare earth elements, scandium, and selenium. These deposits share a generally common origin, but variations in the source...
A simple rubric for Stratigraphic Fidelity (β) of paleoenvironmental time series
Harry J. Dowsett, Marci M. Robinson, Kevin M. Foley
2016, Stratigraphy (13) 303-305
The Pliocene, specifically the late Pliocene, has been a focus of paleoclimate research formore than 25 years. Synoptic regional and global reconstructions along with high-resolution time-series have produced nuanced conceptual models of paleoenvironmental conditions and enhanced our understanding of climate variability and climate sensitivity from the Late Pliocene, the most recent interval of...
Modeling ancient land use and resilient forests in the Jemez Mountains
Rachel A. Loehman
2016, Archaeology Southwest Magazine (30)
No abstract available....
Establishing links between streamflow and ecological integrity in the Sudbury River (Northeastern U.S.)
Allison H. Roy, Stephen F. Jane, Peter D. Hazelton, Todd A. Richards, John T. Finn, Timothy O. Randhir
2016, Cooperator Science Series 122-2016
With increased pressure from a growing human population, managers are challenged to understand how novel disturbances (e.g., climate change, increased water withdrawals, urbanization) may affect natural resources. The Sudbury River is a National Wild and Scenic River located in suburban Boston, Massachusetts (Northeastern US) with myriad impairments (e.g., mainstem impoundments,...
Seismic‐hazard forecast for 2016 including induced and natural earthquakes in the central and eastern United States
Mark D. Petersen, Charles Mueller, Morgan P. Moschetti, Susan M. Hoover, Andrea L. Llenos, William L. Ellsworth, Andrew J. Michael, Justin L. Rubinstein, Arthur F. McGarr, Kenneth S. Rukstales
2016, Seismological Research Letters (87) 1327-1341
The U.S. Geological Survey (USGS) has produced a one‐year (2016) probabilistic seismic‐hazard assessment for the central and eastern United States (CEUS) that includes contributions from both induced and natural earthquakes that are constructed with probabilistic methods using alternative data and inputs. This hazard assessment builds on our 2016 final model...
Improving our understanding of hydraulic-electrical relations: A case study of the surficial aquifer in Emirate Abu Dhabi
Scott Ikard, Wade H. Kress
2016, Conference Paper, Symposium on the Application of Geophysics to Engineering and Environmental Problems 2016
Transmissivity is a bulk hydraulic property that can be correlated with bulk electrical properties of an aquifer. In aquifers that are electrically-resistive relative to adjacent layers in a horizontally stratified sequence, transmissivity has been shown to correlate with bulk transverse resistance. Conversely, in aquifers that are electrically-conductive relative to adjacent...
Building damage survey and microtremor measurements for the source region of the 2015 Gorkha, Nepal, earthquake
Masumi Yamada, Takumi Hayashida, James Mori, Walter Mooney
2016, Earth, Planets and Space
We performed a damage survey of buildings and carried out microtremor observations in the source region of the 2015 Gorkha earthquake. Our survey area spans the Kathmandu valley and areas to the east and north of the valley. Damage of buildings in the Kathmandu valley was localized, and the percentage...
Leveraging constraints and biotelemetry data to pinpoint repetitively used spatial features
Brian M. Brost, Mevin Hooten, Robert J. Small
2016, Ecology (98) 12-20
Satellite telemetry devices collect valuable information concerning the sites visited by animals, including the location of central places like dens, nests, rookeries, or haul‐outs. Existing methods for estimating the location of central places from telemetry data require user‐specified thresholds and ignore common nuances like measurement error. We present a fully...
Thermal mapping of a pahoehoe lava flow, Kilauea Volcano
Matthew R. Patrick, Tim R. Orr, Gary B. Fisher, Frank A. Trusdell, James P. Kauahikaua
2016, Journal of Volcanology and Geothermal Research (332) 71-87
Pāhoehoe lava flows are a major component of Hawaiian eruptive activity, and an important part of basaltic volcanism worldwide. In recent years, pāhoehoe lava has destroyed homes and threatened parts of Hawai‘i with inundation and disruption. In this study, we use oblique helicopter-borne thermal images to create high...
Applying downscaled Global Climate Model data to a groundwater model of the Suwannee River Basin, Florida, USA
Eric D. Swain, J. Hal Davis
2016, American Journal of Climate Change (5) 526-557
The application of Global Climate Model (GCM) output to a hydrologic model allows for comparisons between simulated recent and future conditions and provides insight into the dynamics of hydrology as it may be affected by climate change. A previously developed numerical model of the Suwannee River Basin, Florida, USA, was...
Ciscoes (Coregonus, subgenus Leucichthys) of the Laurentian Great Lakes and Lake Nipigon
Randy L. Eshenroder, Paul Vecsei, Owen T. Gorman, Daniel Yule, Thomas C. Pratt, Nicholas E. Mandrak, David B. Bunnell, Andrew M. Muir
2016, Report, Miscellaneous Publication 2016-01
This study of the ciscoes (Coregonus, subgenus Leucichthys) of the Great Lakes and Lake Nipigon represents a furtherance through 2015 of field research initiated by Walter Koelz in 1917 and continued by Stanford Smith in the mid-1900s—a period spanning nearly a century. Like Koelz’s study, this work contains information on...
Generalizing ecological site concepts of the Colorado Plateau for landscape-level applications
Michael C. Duniway, Travis W. Nauman, Jamin K. Johanson, Shane Green, Mark E. Miller, Brandon T. Bestelmeyer
2016, Rangelands (38) 342-349
Numerous ecological site descriptions in the southern Utah portion of the Colorado Plateau can be difficult to navigate, so we held a workshop aimed at adding value and functionality to the current ecological site system.We created new groups of ecological sites and drafted state-and-transition models for these new groups.We...
Improving the effectiveness of ecological site descriptions: General state-and-transition models and the Ecosystem Dynamics Interpretive Tool (EDIT)
Brandon T. Bestelmeyer, Jeb C. Williamson, Curtis J. Talbot, Greg W. Cates, Michael C. Duniway, Joel R. Brown
2016, Rangelands (38) 329-335
State-and-transition models (STMs) are useful tools for management, but they can be difficult to use and have limited content.STMs created for groups of related ecological sites could simplify and improve their utility. The amount of information linked to models can be increased using tables that communicate management interpretations and important...
Hydrologic connectivity: Quantitative assessments of hydrologic-enforced drainage structures in an elevation model
Sandra K. Poppenga, Bruce B. Worstell
2016, Journal of Coastal Research (Special Issue 76) 90-106
Elevation data derived from light detection and ranging present challenges for hydrologic modeling as the elevation surface includes bridge decks and elevated road features overlaying culvert drainage structures. In reality, water is carried through these structures; however, in the elevation surface these features impede modeled overland surface flow. Thus, a...
Topobathymetric elevation model development using a new methodology: Coastal National Elevation Database
Jeffrey J. Danielson, Sandra K. Poppenga, John Brock, Gayla A. Evans, Dean J. Tyler, Dean B. Gesch, Cindy A. Thatcher, John Barras
2016, Journal of Coastal Research (Special Issue 76) 75-89
During the coming decades, coastlines will respond to widely predicted sea-level rise, storm surge, and coastalinundation flooding from disastrous events. Because physical processes in coastal environments are controlled by the geomorphology of over-the-land topography and underwater bathymetry, many applications of geospatial data in coastal environments require detailed knowledge of the...
Comment on “The reduction of friction in long-runout landslides as an emergent phenomenon” by Brandon C. Johnson et al.
Richard M. Iverson
2016, Journal of Geophysical Research F: Earth Surface (121) 2238-2242
Results from a highly idealized, 2-D computational model indicate that dynamic normal-stress rarefactions might cause friction reduction in long-runout landslides, but the physical relevance of the idealized dynamics has not been confirmed by experimental tests. More importantly, the model results provide no evidence that refutes alternative hypotheses about friction reduction...
Debris flow runup on vertical barriers and adverse slopes
Richard M. Iverson, David L. George, Matthew Logan
2016, Journal of Geophysical Research F: Earth Surface (121) 2333-2357
Runup of debris flows against obstacles in their paths is a complex process that involves profound flow deceleration and redirection. We investigate the dynamics and predictability of runup by comparing results from large-scale laboratory experiments, four simple analytical models, and a depth-integrated numerical model (D-Claw). The experiments and numerical simulations...
Discussion of “The relation between dilatancy, effective stress and dispersive pressure in granular avalanches” by P. Bartelt and O. Buser (DOI: 10.1007/s11440-016-0463-7)
Richard M. Iverson, David L. George
2016, Acta Geotechnica (11) 1465-1468
A paper recently published by Bartelt and Buser (hereafter identified as “the authors”) aims to clarify relationships between granular dilatancy and dispersive pressure and to question the effective stress principle and its application to shallow granular avalanches (Bartelt and Buser in Act Geotech 11:549–557, 2)....
Modelling landslide liquefaction, mobility bifurcation and the dynamics of the 2014 Oso disaster
Richard M. Iverson, David L. George
2016, Geotechnique (66) 175-187
Some landslides move slowly or intermittently downslope, but others liquefy during the early stages of motion, leading to runaway acceleration and high-speed runout across low-relief terrain. Mechanisms responsible for this disparate behaviour are represented in a two-phase, depth-integrated, landslide dynamics model that melds principles from soil mechanics, granular mechanics and...
The 3D elevation program - Precision agriculture and other farm practices
Larry J. Sugarbaker, Carswell
2016, Fact Sheet 2016-3088
A founding motto of the Natural Resources Conservation Service (NRCS), originally the Soil Conservation Service (SCS), explains that “If we take care of the land, it will take care of us.” Digital elevation models (DEMs; see fig. 1) are derived from light detection and ranging (lidar) data and can be...
Linking the Central and Southern Appalachian Blue Ridge: What We Know and Don’t Know about Stratigraphy, Structure, Tectonism, and Regional Correlation in the Eastern Blue Ridge of Virginia
Mark W. Carter, Arthur J. Merschat
2016, Book chapter
The transition from Neoproterozoic Lynchburg Group rocks on the eastern limb of the para-autochthonous Blue Ridge anticlinorium in central Virginia to the fault-bounded Ashe Formation and Alligator Back Formation in southern Virginia has been a source of intense debate and speculation for decades. There are fundamental differences in the...
Comparing orbiter and rover image-based mapping of an ancient sedimentary environment, Aeolis Palus, Gale crater, Mars
Kathryn M. Stack, Christopher Edwards, J. P. Grotzinger, S. Gupta, D. Sumner, Lauren A. Edgar, A. Fraeman, S. Jacob, L. LeDeit, K.W. Lewis, M.S. Rice, D. Rubin, F. Calef, K. Edgett, R.M.E. Williams, K. H. Williford
2016, Icarus 3-21
This study provides the first systematic comparison of orbital facies maps with detailed ground-based geology observations from the Mars Science Laboratory (MSL) Curiosity rover to examine the validity of geologic interpretations derived from orbital image data. Orbital facies maps were constructed for the Darwin, Cooperstown, and Kimberley waypoints visited by...
Designing occupancy studies when false-positive detections occur
Matthew Clement
2016, Methods in Ecology and Evolution (7) 1529-1547
1.Recently, estimators have been developed to estimate occupancy probabilities when false-positive detections occur during presence-absence surveys. Some of these estimators combine different types of survey data to improve estimates of occupancy. With these estimators, there is a tradeoff between the number of sample units surveyed, and the number and type...
Development of a study design and implementation plan to estimate juvenile salmon survival in Lookout Point Reservoir and other reservoirs of the Willamette Project, western Oregon
Tobias J. Kock, Russell W. Perry, Fred R. Monzyk, Adam C. Pope, John M. Plumb
2016, Open-File Report 2016-1211
Survival estimates for juvenile salmon and steelhead fry in reservoirs impounded by high head dams are coveted data by resource managers. However, this information is difficult to obtain because these fish are too small for tagging using conventional methods such as passive-integrated transponders or radio or acoustic transmitters. We developed...
Evaluating external nutrient and suspended-sediment loads to Upper Klamath Lake, Oregon, using surrogate regressions with real-time turbidity and acoustic backscatter data
Liam N. Schenk, Chauncey W. Anderson, Paul Diaz, Marc A. Stewart
2016, Scientific Investigations Report 2016-5167
Executive SummarySuspended-sediment and total phosphorus loads were computed for two sites in the Upper Klamath Basin on the Wood and Williamson Rivers, the two main tributaries to Upper Klamath Lake. High temporal resolution turbidity and acoustic backscatter data were used to develop surrogate regression models to compute instantaneous concentrations and...
