Geologic map of the Hartsel Quadrangle, Park County, Colorado
Peter E. Barkmann, Karen J. Houck, Marieke Dechesne, Jonathan R. Lovekin, Erinn P. Johnson
2019, Open-File Report 17-04
The Hartsel quadrangle sits nearly in the center of the complex South Park Laramide structural basin. Generally, the basin can be described as an asymmetrical down-faulted feature, dipping to the east. It is bounded by two northwest-trending uplifts: the Sawatch uplift to the west and the Front Range uplift to...
Lithologies, ages, and provenance of clasts in the Ordovician Fincastle Conglomerate, Botetourt County, Virginia, USA
Harvey E. Belkin, John E. Repetski, Frank T. Dulong, Nelson L. Hickling
2019, Stratigraphy (15) 1-20
The Fincastle Conglomerate is an Ordovician polymictic, poorly sorted, matrix- and clast-supported cobble to boulder-rich conglomerate located just north of Fincastle, Botetourt County, VA. At least nine other cobble and boulder conglomerates are located in a similar stratigraphic position from Virginia to Georgia west of the Blue Ridge structural front....
Lithospheric signature of late Cenozoic extension in electrical resistivity structure of the Rio Grande rift, New Mexico, USA
D. W. Feucht, Paul A. Bedrosian, Anne F Sheehan
2019, Journal of Geophysical Research B: Solid Earth (124) 2331-2351
We present electrical resistivity models of the crust and upper mantle from two‐dimensional (2‐D) inversion of magnetotelluric (MT) data collected in the Rio Grande rift, New Mexico, USA. Previous geophysical studies of the lithosphere beneath the rift identified a low‐velocity zone several hundred kilometers wide, suggesting that the upper mantle...
Constraining the early eruptive history of the Mono Craters rhyolites, California, based on 238U–230Th isochron dating of their explosive and effusive products
Mae Marcaida, Jorge A. Vazquez, Mark E. Stelten, Jonathan S. Miller
2019, Geochemistry, Geophysics, Geosystems (20) 1539-1556
The Mono Craters are an overlapping chain of at least 28 domes and coulees located south of Mono Lake, east central California, and represent the most recent eruptions of high‐silica rhyolite magma in the Mono Lake‐Long Valley volcanic region. Regionally widespread tephra fall deposits from the Mono Craters serve as...
Effects of nest exposure and spring temperatures on golden eagle brood survival: An opportunity for mitigation
Michael N. Kochert, Karen Steenhof, Jessi L. Brown
2019, Journal of Raptor Research (53) 91-97
We examined Golden Eagle (Aquila chrysaetos) brood survival in relation to spring temperatures and exposure of nests to afternoon sun in southwestern Idaho from 1970 through 2012. Most (77%) nests classified as shaded in a subset of 96 nests had northwest to east aspects, and most (71%) nests classified as...
Life history of the endemic saddleback crayfish, Faxonius medius (Faxon, 1884), (Decapoda: Cambaridae) in Missouri, USA
Robert J. DiStefano, J.T. Westhoff, C.J. Rice, Amanda E. Rosenberger
2019, Freshwater Crayfish (24) 1-13
The saddleback crayfish, Faxonius medius (Faxon, 1884), is endemic to a single drainage in eastern Missouri, USA, that is affected by heavy metals mining, and adjacent to a rapidly-expanding urban area. We studied populations of F. medius in two small streams for 18 months to describe the annual reproductive...
Assessing vulnerability and threat from housing development to Conservation Opportunity Areas in State Wildlife Action Plans across the United States
Sarah K. Carter, Shelley S. Maxted, Tara L. E. Bergeson, David P. Helmers, Lori Scott, Volker C. Radeloff
2019, Landscape and Urban Planning (185) 237-245
Targeting conservation actions efficiently requires information on vulnerability of and threats to conservation targets, but such information is rarely included in conservation plans. In the U.S., recently updated State Wildlife Action Plans identify Conservation Opportunity Areas (COAs) selected by each state as priority areas for future action to conserve wildlife...
On the eruption age and provenance of the Old Crow tephra
Seth D. Burgess, Matthew Coble, Jorge A. Vazquez, Michelle L. Coombs, Kristi L. Wallace
2019, Quaternary Science Reviews (207) 64-79
Tephrochronology is used to correlate and reconstruct geographically disparate sedimentary records of changing environment, climate, and landscape throughout geologic time. Single tephra layers represent isochronous markers across broad regions, thus accurate and precise radiometric constraints on the timing of eruption are critical to their...
Carbon dioxide mineralization feasibility in the United States
Madalyn S. Blondes, Matthew D. Merrill, Steven T. Anderson, Christina A. DeVera
2019, Scientific Investigations Report 2018-5079
Geologic carbon dioxide (CO2) storage is one of many methods for stabilizing the increasing concentration of CO2 in the Earth’s atmosphere. The injection of CO2 in deep subsurface sedimentary reservoirs is the most commonly discussed method; however, the potential for CO2 leakage can create long-term stability concerns. This report discusses...
Wasting disease and static environmental variables drive sea star assemblages in the northern Gulf of Alaska
Brenda Konar, Timothy J. Mitchell, K. Iken, Thomas Dean, Daniel Esler, Mandy Lindeberg, Benjamin Pister, Ben P. Weitzman
2019, Journal of Experimental Marine Biology and Ecology (520) 1-10
Sea stars are ecologically important in rocky intertidal habitats where they can play an apex predator role, completely restructuring communities. The recent sea star die-off throughout the eastern Pacific, known as Sea Star Wasting Disease, has prompted a need to understand spatial and temporal patterns of sea star assemblages and...
Potential for increased inundation in flood-prone regions of southeast Florida in response to climate and sea-level changes in Broward County, Florida, 2060–69
Jeremy D. Decker, Joseph D. Hughes, Eric D. Swain
2019, Scientific Investigations Report 2018-5125
The U.S. Geological Survey, in cooperation with Broward County Environmental Planning and Resilience Division, has developed county-scale and local-scale groundwater/surface-water models to study the potential for increased inundation and flooding in eastern Broward County that are due to changes in future climate and sea-level rise. These models were constructed by...
Assemblage structure, vertical distributions and stable‐isotope compositions of anguilliform leptocephali in the Gulf of Mexico
Andrea M. Quattrini, Jennifer McClain Counts, Stephen J. Artabane, Adela Roa-Varon, Tara C. McIver, Michael Rhode, Steve W. Ross
2019, Journal of Fish Biology (94) 621-647
In August 2007, October 2008 and September–October 2010, 241 Tucker trawl and plankton net tows were conducted at the surface to depths of 1377 m at six locations in the northern and eastern Gulf of Mexico (GOM) to document leptocephalus diversity and determine how assemblage structure, larval size, abundance and isotopic...
The mighty Susquehanna—extreme floods in Eastern North America during the past two millennia
Michael Toomey, Meagan Cantwell, Steven Colman, Thomas M. Cronin, Jeffrey P. Donnelly, Liviu Giosan, Clifford Heil, Robert L. Korty, Marci E. Marot, Debra A. Willard
2019, Geophysical Research Letters (46) 3398-3407
The hazards posed by infrequent major floods to communities along the Susquehanna River and the ecological health of Chesapeake Bay remain largely unconstrained due to the short length of streamgage records. Here we develop a history of high‐flow events on the Susquehanna River during the late Holocene from flood deposits...
Postglacial faulting near Crater Lake, Oregon, and its possible association with the Mazama caldera-forming eruption
Charles R. Bacon, Joel E. Robinson
2019, Geological Society of America Bulletin (131) 1440-1458
Volcanoes of subduction-related magmatic arcs occur in a variety of crustal tectonic regimes, including where active faults indicate arc-normal extension. The Cascades arc volcano Mount Mazama overlaps on its west an ∼10-km-wide zone of ∼north-south–trending normal faults. A lidar (light detection and ranging) survey of Crater Lake National Park, reveals...
Stratigraphic cross sections of the Niobrara Interval of the Upper Cretaceous Cody Shale in the Bighorn Basin, Wyoming and Montana
Thomas M. Finn
2019, Scientific Investigations Map 3422
The Bighorn Basin is one of many structural and sedimentary basins that formed in the Rocky Mountain foreland during the Laramide orogeny. The basin is nearly 180 miles long, 100 miles wide, and encompasses about 10,400 square miles in northern Wyoming and southern Montana. The basin is bounded by major...
Factors affecting the occurrence of lead and manganese in untreated drinking water from Atlantic and Gulf Coastal Plain aquifers, eastern United States—Dissolved oxygen and pH framework for evaluating risk of elevated concentrations
Craig J. Brown, Jeannie R. B. Barlow, Charles A. Cravotta III, Bruce D. Lindsey
2019, Applied Geochemistry (101) 88-102
Groundwater samples collected during 2012 and 2013 from public-supply wells screened in the Atlantic and Gulf Coastal Plain aquifers of the eastern and southeastern U.S. rarely contained lead or manganese concentrations that exceeded drinking-water limits, despite having corrosive characteristics. Data indicate that the occurrence of dissolved lead and manganese in sampled groundwater, prior to...
Four major Holocene earthquakes on the Reelfoot fault recorded by sackungen in the New Madrid seismic zone, USA
Ryan D. Gold, Christopher DuRoss, Jaime E. Delano, Randall W. Jibson, Richard W. Briggs, Shannon A. Mahan, Robert Williams, D. Reide Corbett
2019, Journal of Geophysical Research B: Solid Earth (124) 3105-3126
Three sequences of well-documented, major ~M7+ earthquakes (1811-1812 CE, ~1450 CE, and ~900 CE) in the New Madrid seismic zone, USA, contribute significantly to seismic hazard in the region. However, it is unknown whether this <550 yr recurrence interval has been constant throughout the Holocene given limited geomorphic evidence of...
Dikes in the Koaʻe fault system, and the Koaʻe-east rift zone structural grain at Kīlauea Volcano, Hawaii
Donald A. Swanson, Richard S. Fiske, Carl Thornber, Michael P. Poland
2019, Book chapter, Field volcanology: A tribute to the distinguished career of Don Swanson
Two small scoria vents were discovered in the Koa‘e fault system, an extensional regime connecting the east and southwest rift zones of Kīlauea that was previously considered to be noneruptive. The chemical composition of the scoria suggests an early to middle nineteenth-century age. The vents prove that magma can intrude...
Hydrogeology of Lower Amargosa Valley and groundwater discharge to the Amargosa Wild and Scenic River, Inyo and San Bernardino Counties, California, and adjacent areas in Nye and Clark Counties, Nevada
Wayne R. Belcher, Donald S. Sweetkind, Candice B. Hopkins, Megan E. Poff
2019, Scientific Investigations Report 2018-5151
In 2009, Congress designated certain reaches of the Amargosa River in Inyo County, California between the town of Shoshone and Dumont Dunes as a Wild and Scenic River. As part of the management of the Amargosa Wild and Scenic River, the Bureau of Land...
A new perspective on the 19th century golden pumice deposit of Kilauea volcano
Sebastien Biass, Donald A. Swanson, Bruce F. Houghton
Michael P. Poland, Michael O. Garcia, Victor E. Camp, Anita L. Grunder, editor(s)
2019, Book chapter, Field Volcanology: A Tribute to the Distinguished Career of Don Swanson
The golden pumice deposit (unit K1) represents one of the latest episodes of Hawaiian fountaining in the Keanakāko‘i Tephra and is the product of the first high fountaining eruption at Kīlauea summit in ~300 yr, since the caldera formed in ca. 1500 CE. We present a new physical characterization of...
A scale to characterize the strength and impacts of atmospheric rivers
F. Martin Ralph, Jonathan J. Rutz, Jason M. Cordeira, Michael D. Dettinger, Michael Anderson, David Reynolds, Lawrence J. Schick, Christopher Smallcomb
2019, Bulletin of the American Meteorological Society (100) 269-289
Atmospheric rivers (ARs) play vital roles in the western United States and related regions globally, not only producing heavy precipitation and flooding, but also providing beneficial water supply. This paper introduces a scale for the intensity and impacts of ARs. Its utility may be greatest where ARs are the most...
Field diagnostics and seasonality of Ophidiomyces ophiodiicola in wild snake populations
Jennifer M. McKenzie, Steven J. Price, J. Leo Fleckenstein, Andrea N. Drayer, Grant M. Connette, Elizabeth A. Bohuski, Jeffrey M. Lorch
2019, EcoHealth (16) 141-150
Snake fungal disease (SFD) is an emerging disease caused by the fungal pathogen, Ophidiomyces ophiodiicola. Clinical signs of SFD include dermal lesions, including regional and local edema, crusts, and ulcers. Snake fungal disease is widespread in the Eastern United States, yet there are limited data on how clinical signs...
Monitoring the pulse of our Nation's rivers and streams—The U.S. Geological Survey streamgaging network
Sandra M. Eberts, Michael D. Woodside, Mark N. Landers, Chad R. Wagner
2019, Fact Sheet 2018-3081
In the late 1800s, John Wesley Powell, second Director of the U.S. Geological Survey (USGS), proposed gaging the flow of rivers and streams in the Western United States to evaluate the potential for irrigation. Around the same time, several cities in the Eastern United States established primitive streamgages to help...
Evaluation of temporally correlated noise in global navigation satellite system time series: Geodetic monument performance
John Langbein, Jerry L. Svarc
2019, Journal of Geophysical Research B: Solid Earth (124) 925-942
Estimates of background noise of Global Positioning System‐derived time series of positions for 740 sites in the western United States are examined. These data consist of daily epochs of three components of displacements that are at least 9.75 years long within the interval between 2000 and 2018. We find that these time series...
Explaining harvests of wild-harvested herbaceous plants: American ginseng as a case study
John Paul Schmidt, Jennifer Cruse-Sanders, James L. Chamberlain, Susana Ferreira, John A. Young
2019, Biological Conservation (231) 139-149
Wild-harvested plants face increasing demand globally. As in many fisheries, monitoring the effect of harvesting on the size and trajectory of resource stocks presents many challenges given often limited data from disparate sources. Here we analyze American ginseng (Panax quinquefolius L.) harvests from 18 states in the eastern U.S. 1978–2014 to infer temporal patterns...
