Identifying sources and year classes contributing to invasive grass carp in the Laurentian Great Lakes
Gregory W. Whitledge, Duane Chapman, John Farver, Seth Herbst, Nicholas E. Mandrak, Jeffrey G. Miner, Kevin L. Pangle, Patrick Kocovsky
2021, Journal of Great Lakes Research (47) 14-28
Relative contributions of aquaculture-origin and naturally-reproduced grass carp (Ctenopharyngodon idella) in the Laurentian Great Lakes have been unknown. We assessed occurrence and distribution of aquaculture-origin and wild grass carp in the Great Lakes using ploidy and otolith stable oxygen isotope (δ18O) data. We inferred natal river and dispersal from natal...
Perspectives on the paleolimnology of the late Eocene Florissant lake from diatom and sedimentary evidence at Clare’s Quarry, Teller County, Colorado, USA
Mary Ellen Benson, Dena M. Smith, Sarah A. Spaulding
2021, Book chapter, From saline to freshwater: The diversity of western lakes in space and time
The late Eocene Florissant Formation in central Colorado is a rich and diverse continental Lagerstätte yielding well-preserved fossil assemblages from lacustrine and fluvial facies. This investigation focused on the lacustrine facies at Clare’s Quarry and used biotic and abiotic evidence to characterize aspects of the lake and processes that resulted...
Geothermal play fairway analysis of the Sou Hills, northern Nevada: A major quaternary accommodation zone in the Great Basin region
James E. Faulds, Andrew J. Sadowski, Mark F. Coolbaugh, Drew L. Siler
2020, Conference Paper, Geothermal resources council transactions
To facilitate discovery and development of blind geothermal systems in the Great Basin region, as well as assessment of known systems with surface hot springs, a play fairway approach was developed to evaluate and integrate multiple geologic and geophysical parameters for...
Energy and minerals division tight oil and gas committee: Activities and commodity report for 2019-2020
Justin E. Birdwell, Kent Bowker, Ben Burke, Thomas Chidsey, Ursula Hammes, Bo Henk, Zachary Hollon, Shu Jiang, Peng Li, Kristen R. Marra, Jock McCracken, Richard Nyahay, Abbas Seyedolali, Katie Schmid, Beau Tinnin, Katherine J. Whidden
2020, Report
In 2019, total daily tight oil and gas production increased in the United States month over month, with annualized growth of 14% for oil and 12% for gas. Those gains leveled off in the first quarter of 2020 due to aggressive price competition and increases in international production. Then came...
Geologic map of the Dog River and northern part of the Badger Lake 7.5′ quadrangles, Hood River County, Oregon
Jason D. McClaughry, William E. Scott, Carlie J. M. Duda, Richard M. Conrey
2020, Geological Map 126
The Dog River and northern part of the Badger Lake 7.5' quadrangles encompasses an area of ~201 km2 (77.6 mi2) of the High Cascades of north-central Oregon, lying across the eastern slopes of Mount Hood volcano (Figure 1-1; Plate 1; referred to herein as Dog River–Badger Lake area). Mount Hood,...
Reconnaissance map of the Cenozoic geology in the Carlin basin area, Elko and Eureka counties, Nevada
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...
Vapor-bubble growth in olivine-hosted melt inclusions
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...
Hydrogeology, numerical simulation of groundwater flow, and effects of future water use and drought for reach 1 of the Washita River alluvial aquifer, Roger Mills and Custer Counties, western Oklahoma, 1980–2015
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...
Outburst floods
Jim E. O'Connor, John J. Clague, Joseph S. Walder, Vernon Manville, Robin A. Beebee
2020, Book chapter, Reference Module in Earth Systems and Environmental Sciences
Outbursts from impounded water bodies produce large, hazardous, and geomorphically significant floods affecting the Earth as well as other planetary surfaces. Two broad classes of impoundments are: (1) valleys blocked by ice, landslides, constructed dams, and volcanic materials; and (2) closed basins such as tectonic depressions, calderas, meteor craters, and...
Geologic map and borehole stratigraphy of Hinkley Valley and vicinity, San Bernardino County, California
David M. Miller, Victoria E. Langenheim, Elizabeth K. Haddon
2020, Scientific Investigations Map 3458
Hinkley Valley, in the central to western Mojave Desert of southeastern California, has a long historical record owing to its position as a crossroads for rail and road traffic and its position adjacent to the Mojave River. Subflow in the Mojave River provided groundwater recharge that maintained water consumption and...
Towards the understanding of hydrogeochemical seismic responses in karst aquifers: A retrospective meta-analysis focused on the Apennines (Italy)
Gilberto Binda, Andrea Pozzi, Alessandro Michetti, Paula Noble, Michael R. Rosen
2020, Minerals (10)
Earthquakes are known to affect groundwater properties, yet the mechanisms causing chemical and physical aquifer changes are still unclear. The Apennines mountain belt in Italy presents a rich literature of case studies documenting hydrogeochemical response to seismicity, due to the high frequency of seismic events and the presence of different...
Sphalerite oxidation in seawater with covellite: Implications for seafloor massive sulfide deposits and mine waste
Amy Gartman, Samantha P. Whisman, James R. Hein
2020, ACS Earth and Space Chemistry (4) 2261-2269
Metal sulfide minerals exist in several marine environments and are in thermodynamic disequilibrium with oxygenated seawater from the time of their formation. Oxidation is both ubiquitous and heterogeneous, as observational and experimental evidence demonstrates that sulfide minerals may oxidize completely on decadal...
Critical shifts in trace metal transport and remediation performance under future low river flows
Patrick A. Byrne, Patrizia Onnis, Robert L. Runkel, Ilaria Frau, Sarah F. L. Lynch, Paul Edwards
2020, Environmental Science & Technology (54) 15742-15750
Exceptionally low river flows are predicted to become more frequent and more severe across many global regions as a consequence of climate change. Investigations of trace metal transport dynamics across streamflows reveal stark changes in water chemistry, metal transformation processes, and...
Alkalic-type epithermal gold deposit model
Karen D. Kelley, Paul G. Spry, Virginia T. McLemore, David L. Fey, Eric D. Anderson
2020, Scientific Investigations Report 2010-5070-R
This report summarizes the primary characteristics of alkalic-type epithermal gold (Au) deposits and provides an updated descriptive model. These deposits, primarily of Mesozoic to Neogene age, are among the largest epithermal gold deposits in the world. Considered a subset of low-sulfidation epithermal deposits, they are spatially and genetically linked to...
Assessing uranium and select trace elements associated with breccia pipe uranium deposits in the Colorado River and main tributaries in Grand Canyon, USA
Fred D. Tillman, Jessica R. Anderson, Joel A. Unema, Thomas Chapin
2020, PLoS ONE (15)
Assessing chemical loading from streams in remote, difficult-to-access watersheds is challenging. The Grand Canyon area in northern Arizona, an international tourist destination and sacred place for many Native Americans, is characterized by broad plateaus divided by canyons as much as two-thousand meters deep and hosts some of the highest-grade uranium...
Technical overview of the U.S. Geological Survey Earth Mapping Resources Initiative (Earth MRI)
Warren C. Day
2020, Fact Sheet 2020-3055
The Earth Mapping Resources Initiative (Earth MRI) was developed by the U.S. Geological Survey in response to a Federal directive calling on various Federal agencies to address potential vulnerabilities in the Nation’s supply of critical mineral resources. The primary purpose of this initiative is to identify potentially mineralized areas containing...
Water resources in the Cheyenne and Arapaho Tribal jurisdictional area, west-central Oklahoma, with an analysis of data gaps through 2015
Carol Becker, Matthew S. Varonka
2020, Scientific Investigations Report 2020-5105
This report provides an overview of existing hydrologic information describing the quality, quantity, and extent of the major surface-water and groundwater resources in the Cheyenne and Arapaho Tribal jurisdictional area, west-central Oklahoma. Hydrologic information is provided for five major river systems (Cimarron River, North Canadian River, Canadian River, Washita River,...
Surficial geologic map of the Spirit Mountain SE and part of the Spirit Mountain NE 7.5' quadrangles, Nevada and Arizona
Kyle House, Ryan S. Crow, Philip A Pearthree, Amy L. Brock-Hon, Jonathan Schwing, Jacob O. Thacker, Brian F. Gootee
2020, Scientific Investigations Map 3448
This geologic map includes a trove of stratigraphic and geomorphic information that chronicles the inception and evolution of the lower Colorado River. The map area is located near the south end of the Lake Mead National Recreation Area about 80 km (50 mi) downstream from Hoover Dam. It spans parts...
Geologic map of the greater Portland metropolitan area and surrounding region, Oregon and Washington
Ray E. Wells, Ralph A. Haugerud, Alan R. Niem, Wendy A. Niem, Lina Ma, Russell C. Evarts, Jim E. O'Connor, Ian P. Madin, David R. Sherrod, Marvin H. Beeson, Terry L. Tolan, Karen L. Wheeler, William B. Hanson, Michael G. Sawlan
2020, Scientific Investigations Map 3443
The Portland-Vancouver-Hillsboro Metropolitan Area (metro area) has great scenic, natural, and cultural resources and is the major economic hub of Oregon. The metro area is subject to a variety of geologic hazards. Underthrusting of the oceanic plate along the Cascadia plate boundary fault, or megathrust, deforms the leading edge of...
Photoluminescence imaging of whole zircon grains on a petrographic microscope—An underused aide for geochronologic studies
Ryan J. McAleer, Aaron M. Jubb, Paul C. Hackley, Gregory J. Walsh, Arthur J. Merschat, Sean P. Regan, William C. Burton, Jorge A. Vazquez
2020, Minerals (10)
The refractory nature of zircon to temperature and pressure allows even a single zircon grain to preserve a rich history of magmatic, metamorphic, and hydrothermal processes. Isotopic dating of micro-domains exposed in cross-sections of zircon grains allows us to interrogate this history. Unfortunately, our ability to select...
Grade and tonnage model for tungsten skarn deposits—2020 update
Carlin J. Green, Graham W. Lederer, Heather L. Parks, Michael L. Zientek
2020, Scientific Investigations Report 2020-5085
This report presents an updated grade and tonnage model for tungsten skarn deposits. As a critical component of the U.S. Geological Survey’s three-part form of quantitative mineral resource assessment, robust grade and tonnage models are essential to transforming mineral resource assessments into effective tools for decision makers. Using the best...
Exploring methane behavior in Marcellus Shale micropores via contrast matching neutron scattering
Aaron M. Jubb, Leslie F. Ruppert, Tristan G. A. Youngs, Thomas Headen
2020, Energy & Fuels (34) 10926-10932
Petroleum in shale reservoirs is hosted in organic matter and mineral pores as well as in natural fractures and voids. For thermally mature plays, e.g., the Marcellus Shale, methane and other light alkane gases are thought to be primarily contained in organic matter pores with radii ≦50 nm. Thus, in...
Plant biomass and rates of carbon dioxide uptake are enhanced by successful restoration of tidal connectivity in salt marshes
Fanning Wang, Meagan J. Eagle, Kevin D. Kroeger, Amanda C. Spivak, Jianwu Tang
2020, Science of the Total Environment (750)
Salt marshes, due to their capability to bury soil carbon (C), are potentially important regional C sinks. Efforts to restore tidal flow to former salt marshes have increased in recent decades in New England (USA), as well as in some other parts of the...
Mineral resource database for deposits related to the Mesoproterozoic Midcontinent Rift System, United States and Canada
Laurel G. Woodruff, Klaus J. Schulz, Connie L. Dicken, Suzanne W. Nicholson
2020, Open-File Report 2020-1069
The Midcontinent Rift System (MRS) of North America is one of the world’s largest continental rifts and has an age of 1.1 Ga (giga-annum). The MRS hosts a diverse suite of magmatic and hydrothermal mineral deposits in the Lake Superior region where rift rocks are exposed at or near the...
Soil organic carbon stocks and sequestration rates of inland, freshwater wetlands: Sources of variability and uncertainty
Brian Tangen, Sheel Bansal
2020, Science of the Total Environment (749)
Impacts of land use, specifically soil disturbance, are linked to reductions of soil organic carbon (SOC) stocks. Correspondingly, ecosystem restoration is promoted to sequester SOC to mitigate anthropogenic greenhouse gas emissions, which are exacerbating global climate change. Restored wetlands have relatively high potential to...
