Life on the edge in eastern Alaska: Basal Ordovician(Tremadocian), platform-margin faunas of the Jones Ridge Formation
J. F. Taylor, T. J. Allen, John E. Repetski, J. V. Strauss, S. J. Irwin
2015, Stratigraphy (12) 71-77
As the most fossiliferous and least deformed succession of unequivocally Laurentian lower Paleozoic strata in Alaska, the Jones Ridge Limestone has provided critical data for numerous stratigraphic studies (e. g. Palmer 1968; Harris et al. 1995; Dumoulin et al. 2002; Dumoulin and Harris 2012) focused on the Cambrian and Ordovician...
2014 M=6.0 South Napa earthquake triggered widespread aftershocks and stressed several major faults and exotic fault clusters
Shinji Toda, Ross Stein
2015, Seismological Research Letters (86) 1593-1602
The strongest San Francisco Bay area earthquake since the 1989 Mw 7.0 Loma Prieta shock struck near Napa on 24 August 2014. Field mapping (Dawson et al., 2014; Earthquake Engineering Research Institute [EERI], 2014; Brocher et al., 2015) and seismic and geodetic source inversions (Barnhart et al., 2015; Dreger et...
Avian disease and mosquito vectors in the Kahuku unit of Hawai`i Volcanoes National Park and Ka`u Forest Reserve
Jacqueline Gaudioso, Dennis A. LaPointe, Carter T. Atkinson, Ariel N. Egan
2015, Technical Report HCSU-070
While avian disease has been well-studied in windward forests of Hawai‘i Island, there have been few studies in leeward Ka‘u. We surveyed four altitudinal sites ranging from 1,200 to 2,200 m asl in the Kahuku Unit of Hawai‘i Volcanoes National Park (Kahuku) and three altitudinal sites ranging from 1,200 to...
An apparatus reconstruction of the conodont Caenodontus serrulatus Behnken 1975
Merlynd K. Nestell, Bruce R. Wardlaw
2015, Micropaleontology (v. 61) 293-300
The conodont species Caenodontus serrulatus Behnken is a rare coniform element first described in 1975 from Guadalupian strata exposed in the Guadalupe and Delaware Mountains of West Texas. Because it is rare, coniform, and occurs long after most coniform elements supposedly disappeared, it has been hauntingly mysterious. Based on new...
Evaluating connection of aquifers to springs and streams, Great Basin National Park and vicinity, Nevada
David E. Prudic, Donald S. Sweetkind, Tracie R. Jackson, K. Elaine Dotson, Russell W. Plume, Christine E. Hatch, Keith J. Halford
2015, Professional Paper 1819
Federal agencies that oversee land management for much of the Snake Range in eastern Nevada, including the management of Great Basin National Park by the National Park Service, need to understand the potential extent of adverse effects to federally managed lands from nearby groundwater development. As a result, this study...
Surficial geology and shaded seafloor relief of Georges Bank, Fundian Channel and Northeast Channel, Gulf of Maine
B.J. Todd, Page C. Valentine
2015, Report, Geological Survey of Canada Open File series
Georges Bank is a shallow submarine bank that lies south of Nova Scotia and east of Cape Cod and bounds the seaward side of the Gulf of Maine. The international boundary between Canada and the United States transects the bank, and the eastern part of the bank (~7500 square kilometres)...
Simulated responses of streams and ponds to groundwater withdrawals and wastewater return flows in southeastern Massachusetts
Carl S. Carlson, Donald A. Walter, Jeffrey R. Barbaro
2015, Scientific Investigations Report 2015-5168
Water use, such as withdrawals, wastewater return flows, and interbasin transfers, can alter streamflow regimes, water quality, and the integrity of aquatic habitat and affect the availability of water for human and ecosystem needs. To provide the information needed to determine alteration of streamflows and pond water levels in southeastern...
Coastal landforms and processes at the Cape Cod National Seashore, Massachusetts—A primer
Graham S. Giese, S. Jeffress Williams, Mark Adams
2015, Circular 1417
Anyone who spends more than a few days on Cape Cod (the Cape) quickly becomes a coastal geologist, quickly learning the rhythms of daily tides and the seasonal cycles of beaches growing and being swept away by storms; swimmers and surfers track how the breakers appear, and dog-walkers notice the...
Fall and winter movements and habitat use of the introduced American bullfrog (Lithobates catesbeiana) in a Montana pond
Adam J. Sepulveda, Megan J. Layhee
2015, Herpetological Conservation and Biology (10) 978-984
American Bullfrogs (Lithobates catesbeianus) have been introduced across the globe, including in many northern latitude habitats where wetlands are ice-covered for part of the year. Because bullfrogs are less mobile at low temperatures, greater knowledge about their overwintering habitat may provide additional opportunities for control. Here, we described fall and...
Functional response of ungulate browsers in disturbed eastern hemlock forests
Stephen DeStefano
2015, Forest Ecology and Management (32) 177-183
Ungulate browsing in predator depleted North American landscapes is believed to be causing widespread tree recruitment failures. However, canopy disturbances and variations in ungulate densities are sources of heterogeneity that can buffer ecosystems against herbivory. Relatively little is known about the functional response (the rate of consumption in relation to...
California State Waters map series — Offshore of Pigeon Point, California
Guy R. Cochrane, Janet Watt, Peter Dartnell, H. Gary Greene, Mercedes D. Erdey, Bryan E. Dieter, Nadine E. Golden, Samuel Y. Johnson, Charles A. Endris, Stephen R. Hartwell, Rikk G. Kvitek, Clifton W. Davenport, Lisa M. Krigsman, Andrew C. Ritchie, Ray W. Sliter, David P. Finlayson, Katherine L. Maier
Guy R. Cochrane, Susan A. Cochran, editor(s)
2015, Open-File Report 2015-1232
Introduction In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP), designed to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats, and geology within the 3-nautical-mile limit of California’s State Waters. The CSMP approach is to create highly detailed seafloor maps through collection, integration,...
Qualitative assessment of selected areas of the world for undiscovered sediment-hosted stratabound copper deposits: Chapter Y in Global mineral resource assessment
Michael L. Zientek, Niki E. Wintzer, Timothy S. Hayes, Heather L. Parks, Deborah A. Briggs, J. Douglas Causey, Shyla A. Hatch, M. Christopher Jenkins, David J. Williams
Michael L. Zientek, Jane M. Hammarstrom, Kathleen M. Johnson, editor(s)
2015, Scientific Investigations Report 2010-5090-Y
A qualitative mineral resource assessment of sediment-hosted stratabound copper mineralized areas for undiscovered copper deposits was performed for 10 selected areas of the world. The areas, in alphabetical order, are (1) Belt-Purcell Basin, United States and Canada; (2) Benguela and Cuanza Basins, Angola; (3) Chuxiong Basin, China; (4) Dongchuan Group...
Status and trends of land change in the Midwest–South Central United States—1973 to 2000
Roger F. Auch, Krista A. Karstensen
Roger F. Auch, Krista A. Karstensen, editor(s)
2015, Professional Paper 1794-C
U.S. Geological Survey (USGS) Professional Paper 1794–C is the third in a four-volume series on the status and trends of the Nation’s land use and land cover, providing an assessment of the rates and causes of land-use and land-cover change in the Midwest–South Central United States between 1973 and 2000....
Geologic Cross Section I–I′ Through the Appalachian Basin from the Eastern Margin of the Illinois Basin, Jefferson County, Kentucky, to the Valley and Ridge Province, Scott County, Virginia
Robert T. Ryder, Michael H. Trippi, Christopher S. Swezey
2015, Scientific Investigations Map 3343
Geologic cross section I‒I’ is the fourth in a series of cross sections constructed by the U.S. Geological Survey to document and improve understanding of the geologic framework and petroleum systems of the Appalachian basin. Cross section I‒I’ provides a regional view of the structural and stratigraphic framework of the...
Occurrence and transport of selected constituents in streams near the Stibnite mining area, Central Idaho, 2012–14
Alexandra B. Etheridge
2015, Scientific Investigations Report 2015-5166
Mining of stibnite (antimony sulfide), tungsten, gold, silver, and mercury near the town of Stibnite in central Idaho has left a legacy of trace element contamination in local streams. Water-quality and streamflow monitoring data from a network of five streamflow-gaging stations were used to estimate trace-element and suspended-sediment loads and...
Stratigraphy and paleogeographic significance of a Late Pennsylvanian to Early Permian channeled slope sequence in the Darwin Basin, southern Darwin Hills, east-central California
Calvin H. Stevens, Paul Stone, Robert T. Magginetti, Scott M. Ritter
2015, Stratigraphy (12) 185-196
The complex stratigraphy of late Paleozoic rocks in the southern Darwin Hills consists of regionally extensive Mississippian and Early to Middle Pennsylvanian rocks overlain by latest Pennsylvanian to Early Permian rocks, herein called the Darwin Hills sequence. Deposition of this latter sequence marked the beginning of the Darwin Basin. In...
Architecture and evolution of an Early Permian carbonate complex on a tectonically active island in east-central California
Calvin H. Stevens, Robert T. Magginetti, Paul Stone
2015, Stratigraphy (12) 167-182
The newly named Upland Valley Limestone represents a carbonate complex that developed on and adjacent to a tectonically active island in east-central California during a brief interval of Early Permian (late Artinskian) time. This lithologically unique, relatively thin limestone unit lies within a thick sequence of predominantly siliciclastic rocks and...
Regional implications of new chronostratigraphic and paleogeographic data from the Early Permian Darwin Basin, east-central California
Calvin H. Stevens, Paul Stone, Robert T. Magginetti
2015, Stratigraphy (12) 149-166
The Darwin Basin developed in response to episodic subsidence of the western margin of the Cordilleran continental shelf from Late Pennsylvanian (Gzhelian) to Early Permian (late Artinskian) time. Subsidence of the basin was initiated in response to continental truncation farther to the west and was later augmented by thrust emplacement...
Classification of ephemeral, intermittent, and perennial stream reaches using a TOPMODEL-based approach
Tanja N. Williamson, Carmen T. Agouridis, Christopher D. Barton, Jonathan A. Villines, Jeremiah G. Lant
2015, Journal of the American Water Resources Association (51) 1739-1759
Whether a waterway is temporary or permanent influences regulatory protection guidelines, however, classification can be subjective due to a combination of factors, including time of year, antecedent moisture conditions, and previous experience of the field investigator. Our objective was to develop a standardized protocol using publicly available spatial information to classify...
Estimating regional landbird populations from enhanced North American Breeding Bird Surveys
Daniel J. Twedt
2015, Journal of Field Ornithology (86) 352-368
Estimating the size of bird populations is central to effective conservation planning and prudent management. I updated estimated regional bird populations for the East Gulf Coastal Plain of Mississippi using data from 275 North American Breeding Bird Surveys from 2009 to 2013. However, regional bird populations estimated from count surveys...
California State Waters Map Series — Offshore of Fort Ross, California
Samuel Y. Johnson, Peter Dartnell, Nadine E. Golden, Stephen R. Hartwell, Mercedes D. Erdey, H. Gary Greene, Guy R. Cochrane, Rikk G. Kvitek, Michael W. Manson, Charles A. Endris, Bryan E. Dieter, Janet Watt, Lisa M. Krigsman, Ray W. Sliter, Erik N. Lowe, John L. Chin
Samuel Y. Johnson, Susan A. Cochran, editor(s)
2015, Open-File Report 2015-1211
Introduction In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP), designed to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats, and geology within the 3-nautical-mile limit of California’s State Waters. The CSMP approach is to create highly detailed seafloor maps through collection, integration,...
Early Permian conodont fauna and stratigraphy of the Garden Valley Formation, Eureka County, Nevada
Bruce R. Wardlaw, Dora M. Gallegos, Valery V. Chernykh, Walter S. Snyder
2015, Stratigraphy (12) 197-215
The lower Part of the Garden Valley Formation yields two distinct conodont faunas. One of late Asselian age dominated by Mesogondolella and Streptognathodus and one of Artinskian age dominated by Sweetognathus with Mesogondolella. The Asselian fauna contains the same species as those found in the type area of the Asselian...
Assessment of undiscovered sandstone-hosted uranium resources in the Texas Coastal Plain, 2015
Mark J. Mihalasky, Susan M. Hall, Jane M. Hammarstrom, Kathleen R. Tureck, Mark T. Hannon, George N. Breit, Robert A. Zielinski, Brent Elliott
2015, Fact Sheet 2015-3069
The U.S. Geological Survey estimated a mean of 220 million pounds of recoverable uranium oxide (U3O8 ) remaining as potential undiscovered resources in southern Texas. This estimate used a geology-based assessment method for Tertiary sandstone-hosted uranium deposits in the Texas Coastal Plain sedimentary strata (fig.1)....
Seismic hazard in the eastern United States
Charles Mueller, Oliver S. Boyd, Mark D. Petersen, Morgan P. Moschetti, Sanaz Rezaeian, Allison Shumway
2015, Earthquake Spectra (31) 85-107
The U.S. Geological Survey seismic hazard maps for the central and eastern United States were updated in 2014. We analyze results and changes for the eastern part of the region. Ratio maps are presented, along with tables of ground motions and deaggregations for selected cities. The Charleston fault model was...
Evaluating predictors of local dabbling duck abundance during migration: Managing the spectrum of conditions faced by migrants
Kevin Aagaard, Shawn M. Crimmins, Wayne E. Thogmartin, Brian G. Tavernia, James E. Lyons
2015, Wildfowl (65) 100-120
The development of robust modelling techniques to derive inferences from large-scale migratory bird monitoring data at appropriate scales has direct relevance to their management. The Integrated Waterbird Management and Monitoring programme (IWMM) represents one of the few attempts to monitor migrating waterbirds across entire flyways using targeted local surveys. This...
