Seth Davidson
2020, Report
No abstract available....
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Publication Extents
Not all publications have extents, not all extents are completely accurateKeith A. Howard, Charles A. Ferguson
2020, Conference Paper, Changing facies: Desert symposium 2020
The northwest trend of the southern Colorado River extensional corridor in the southwestern USA veers northward between 34° and 35° north latitude. The tilt axes of early Miocene west-tilted volcanic strata in the west-central Sacramento Mountains mirror this bend. Steeply dipping early Miocene strata and volcanics north and south of...
S. A. Halldorsson, P. Scarsi, T. Abebe, T. Evans, Justin T. Kulongoski, P. R. Castillo, P. H. Barry
2020, Conference Paper, Proceedings World Geothermal Congress 2020+1
We report He-CO2-N2 isotopic and relative abundances in free gases and dissolved gas phase of geothermal fluids from the Ethiopian Rift. Fluid samples were collected from ~30 geothermal localities from three key regions throughout rifted and non-rifted areas of Ethiopia. The majority of samples, including off-rift samples, indicate a strong...
Lindsay A. Davis, Jocelyn West, Lori Peek, K. Stephen Hughes, James Joyce, William H. Schulz, Jonathan W. Godt, Darysabel Perez Martinez, Gisela Baez Sanchez, Glorymar Gomez Perez, Carolina Hincapie Cardenas, Christa von Hillebrandt, Lorna Jaramillo-Nieves, Jenniffer Santos-Hernandez, Raquel Lugo Bendezu, Yahaira Alvarez Gandia
2020, Report
No abstract available....
Alan R. Wallace
2020, Nevada Bureau of Mines and Geology Open File Report 2020-02
The middle Miocene Carlin sedimentary basin encompasses a large area between the Adobe Range to the east, the Piñon Range to the south, the southern Independence Mountains and Marys Mountain to the west, and Swales Mountain to the north. The town of Carlin is in the southern part of the...
Samantha Arundel, Gaurav Sinha, Arthur Chan
2020, Conference Paper, AutoCarto 2020 presentations
The National Map (TNM) portal provides public access to U.S. Geological Survey (USGS) high-resolution topographic datasets, and maps from the Historical Topographic Map Collection (HTMC). Elevation values shown on HTMC maps were obtained from ground spot elevation measurements, as compared to today’s elevation measurements derived from more efficient methods, such...
Greg N. McDonald, Emily J. Kleber, Adam I. Hiscock, S. Bennett, Steve D. Bowman
2020, Report, Report of Investigation 280
The Wasatch fault zone (WFZ) is a 220-mile-long (350-km) fault zone divided into 10 structural segments extending from southeastern Idaho to central Utah. The central five segments of the WFZ underlie the densely populated Wasatch Front region, where the majority of Utah’s population and economy are proximal to the fault...
Oliver Patton, Veronica L. Violette, Matthew J. Young, Frederick V. Feyrer
2020, San Francisco Estuary & Watershed Science (18)
White Sturgeon (Acipenser transmontanus), a species of concern in the San Francisco Estuary, is in relatively low abundance due to a variety of factors. The purpose of our study was to identify the estuarine habitat used by White Sturgeon to aid in the conservation and management of the species locally...
Gregory A Geller, Gary S Casper, Brian J. Halstead
2020, Chelonian Conservation and Biology (19) 217-235
Despite its biological importance in shaping both individual fitness and population structure, much remains to be learned about the hatchling emergence ecology of most freshwater turtles. Here, we provide some of the first details on these early life stages for the Ouachita map turtle (Graptemys...
Stephen C. Brown, Mark F. Coolbaugh, Jacob DeAngelo, James E. Faulds, Michael Fehler, Chen Gu, John H. Queen, Sven Treitel, Connor M. Smith, Eli Mlawsky
2020, Conference Paper, Geothermal Resources Council Transactions
A study is underway to apply machine learning methods to evaluate natural resource potential. In particular, we are considering the search for blind geothermal systems in Nevada. Beginning with the data and experience from the previous Nevada play fairway analysis project, we are building models in TensorFlow/Keras and gaining experience...
Brian J. Halstead, Caren S. Goldberg, Robert B Douglas, Patrick M. Kleeman, David W Ulrich
2020, Northwestern Naturalist (101) 194-209
Stream-obligate amphibians are important indicators of ecosystem health in the Pacific Northwest, but distributional information to improve forest management is lacking in many regions. We analyzed archived DNA extracted from water samples in 60 pools in streams on private timberlands in Mendocino County, California, for...
Todd Hawbaker, Melanie K. Vanderhoof, Gail L. Schmidt, Yen-Ju G. Beal, Joshua J. Picotte, Joshua Takacs, Jeff T. Falgout, John L. Dwyer
2020, Report
Introduction Lack of consistent spatial and temporal fire information with relevant spatial resolution hinders land management and broad-scale assessments of fire activity, especially in the eastern United States and the Great Plains where fi re is important ecologically and culturally. Remote sensing can be used to monitor fi re activity, augment...
E. Lynn Usery
2020, Cartography and Geoinformation (19) 66-77
Map projections are an area of cartography with a firm mathematical foundation for their creation and display providing a basis for a knowledge representation. Using only variations on a single equation set, an infinite number of projections can be created, but less than 100 are in active use. Because each...
Gregory A Geller, Gary S Casper, Brian J. Halstead
2020, Chelonian Conservation and Biology (19) 236-245
Despite its importance to individual fitness and population dynamics, the dispersal behaviors of most neonate freshwater turtles after nest emergence are poorly known. We studied the initial dispersal tendencies of neonate Ouachita map turtles (Graptemys ouachitensis) exiting natural nests during 2015–2017 along the Wisconsin River,...
Victoria Langenheim
2020, Mojave Science Newsletter 9-14
No abstract available....
Daniel J. Rasmussen, Terry Plank, Paul J. Wallace, Megan Newcombe, Jacob B. Lowenstern
2020, American Mineralogist (105) 1898-1919
Melt inclusions record the depth of magmatic processes, magma degassing paths, and volatile budgets of magmas. Extracting this information is a major challenge. It requires determining melt volatile contents at the time of entrapment when working with melt inclusions that have suffered post-entrapment modifications. Several processes decrease internal melt inclusion...
Gregory B. Lawrence, Michael R. Antidormi
2020, Report
Repeated sampling to detect changes in forest soils was rarely used before 1990, but the value of soil monitoring in understanding environmental change is becoming well established. The growing number of resampling studies has shown that sampling designs and procedures must be adapted to the objectives of the monitoring...
David S. Pilliod, Lisa A. Hallock, Mark P. Miller, Thomas D. Mullins, Susan M. Haig
2020, Herpetological Conservation and Biology (15) 597-610
Conservation of wide-ranging species is aided by population genetic information that provides insights into adaptive potential, population size, interpopulation connectivity, and even extinction risk in portions of a species range. The Striped Whipsnake (Masticophis taeniatus) occurs across 11 western U.S. states and into Mexico but has experienced population declines...
Amelie Lescroël, Phil O’B. Lyver, Dennis Jongsomjit, Sam Veloz, Katie Dugger, Peter Kappes, Brian J. Karl, Amy L. Whitehead, Roger Pech, Theresa L. Cole, Grant Ballard
2020, MEPS (636) 189-205
Inter-individual differences in demographic traits of iteroparous species can arise through learning and maturation, as well as from permanent differences in individual ‘quality’ and sex-specific constraints. As the ability to acquire energy determines the resources an individual can allocate to reproduction and self-maintenance, foraging behavior is a key trait...
David E. Rosenberg, Yves Filion, Rebecca Teasley, Samuel Sandoval-Solis, Jory Seth Hecht, Jakobus E. van Zyl, George F. McMahon, J. S. Horsburgh, Joseph R. Kasprzyk, David G. Tarboton
2020, Journal of Water Resources Planning and Management (146)
Science and engineering rest on the concept of reproducibility. An important question for any study is: are the results reproducible? Can the results be recreated independently by other researchers or professionals? Research results need to be independently reproduced and validated before they are accepted as fact or theory. Across numerous...
Mai Fahmy, Kalani Williams, Michael Tessler, Sarah R. Weiskopf, Evon Hekkala, Mark E. Siddall
2020, Journal of Parasitology (106) 843-853
Leech-derived invertebrate DNA (iDNA) has been successfully leveraged to conduct surveys of vertebrate host biodiversity across the Indo Pacific. However, this technique has been limited methodologically, typically only targeting mammalian 16S rDNA, or both 16S and vertebrate 12S rDNA for leech host determination. To improve the taxonomic richness of vertebrate...
John H. Ellis, Derek W. Ryter, Leland T. Fuhrig, Kyle W. Spears, Shana L. Mashburn, Ian M.J. Rogers
2020, Scientific Investigations Report 2020-5118
The Washita River alluvial aquifer is a valley-fill and terrace alluvial aquifer along the valley of the Washita River in western Oklahoma that provides a productive source of groundwater for agricultural irrigation and water supply. The Oklahoma Water Resources Board (OWRB) has designated the westernmost section of the aquifer in...
Amy J. Benson
2020, Newsletter, Invasive and Introduced Species Section Newsletter
Although this fish had been present in the then United States (US) territory of Hawaii since the late 19th century, a growing number of collections in the contiguous US over a century later in the 2000s is noteworthy. The Oriental Weatherfish, also often referred to as the weather loach...
Li H. Erikson, Ann E. Gibbs, Bruce M. Richmond, Curt D. Storlazzi, Benjamin M. Jones, Karin Ohman
2020, Open-File Report 2020-1142
Executive SummaryArey Lagoon, located in eastern Arctic Alaska, supports a highly productive ecosystem, where soft substrate and coastal wet sedge fringing the shores are feeding grounds and nurseries for a variety of marine fish and waterfowl. The lagoon is partially protected from the direct onslaught of Arctic Ocean waves by...
Samuel Levi Helmuth, Evan Martin, Mary K. V. Hodges, Duane E. Champion
2020, Report
The geologic map of the Butte City 7.5’ quadrangle is based on mapping summarized in the 1:100,000 scale map of the Idaho National Laboratory, U.S. Geological Survey Miscellaneous Investigations Map I-2330, by Kuntz and others, 1994. New surficial geologic mapping was completed by National Association of Geoscience Teachers (NAGT) interns,...