Geologic history of Siletzia, a large igneous province in the Oregon and Washington Coast Range: Correlation to the geomagnetic polarity time scale and implications for a long-lived Yellowstone hotspot
Ray Wells, David Bukry, Richard Friedman, Douglas Pyle, Robert Duncan, Peter J. Haeussler, Joe Wooden
2014, Geosphere (10) 692-719
Siletzia is a basaltic Paleocene and Eocene large igneous province in coastal Oregon, Washington, and southern Vancouver Island that was accreted to North America in the early Eocene. New U-Pb magmatic, detrital zircon, and 40Ar/39Ar ages constrained by detailed field mapping, global nannoplankton zones, and magnetic polarities allow correlation of...
Age, chemistry, and correlations of Neoproterozoic–Devonian igneous rocks of the Arctic Alaska–Chukotka terrane: An overview with new U-Pb ages
Jeffrey M Amato, John N. Aleinikoff, Vyacheslav V Akinin, William C. McClelland, Jaime Toro
Julie A. Dumoulin, Alison B. Till, editor(s)
2014, Book chapter, Reconstruction of a Late Proterozoic to Devonian continental margin sequence, northern Alaska, its paleogeographic significance, and contained base-metal sulfide deposits
The Arctic Alaska–Chukotka terrane is a microcontinent with an origin exotic to Laurentia. We used a sensitive high-resolution ion microprobe (SHRIMP) to date nine samples of Neoproterozoic rock and five samples of Devonian rock from the Brooks Range and Seward Peninsula of Alaska and from the Chukotka Peninsula of northeastern...
U-Pb detrital zircon geochronology as evidence for the origin of the Nome Complex, northern Alaska, and implications for regional and trans-Arctic correlations
Alison Till, Jeffrey M. Amato, John N. Aleinikoff, Heather A. Bleick
2014, Book chapter, Reconstruction of a Late Proterozoic to Devonian continental margin sequence, northern Alaska, its paleogeographic significance, and contained base-metal sulfide deposits
Detrital zircons from the Nome Complex, a metamorphic terrane in northern Alaska, reveal important constraints on the early Paleozoic history of the Arctic Alaska–Chukotka terrane, a microcontinental block with an origin exotic to Laurentia.Twenty-two samples (17 in this study, five previously published) produce three detrital zircon population patterns (called themes),...
Preface
Julie A. Dumoulin, Alison Till
2014, Book chapter, Reconstruction of a Late Proterozoic to Devonian continental margin sequence, northern Alaska, its paleogeographic significance, and contained base-metal sulfide deposits
The tectonic evolution of the Arctic realm, particularly in the Mesozoic, remains a subject of considerable uncertainty. The nature of the crustal entities involved, their origins, and the nature, location, and age of major tectonic boundaries are incompletely studied and understood (Pease, 2011). The largest...
Pb isotope geochemistry of stratabound Zn-Pb(-Ag-Au-Ba-F) deposits and occurrences in the Nome Complex, Seward Peninsula, Alaska: Metal sources and regional comparisons
Robert A. Ayuso, Alison Till, John F. Slack, Francesca Forni
2014, Book chapter, Reconstruction of a Late Proterozoic to Devonian continental margin sequence, northern Alaska, its paleogeographic significance, and contained base-metal sulfide deposits
A detailed study of the Pb isotope geochemistry of Zn-Pb(-Ag-Au-Ba-F) stratabound sulfide deposits within metasedimentary rocks of the Neoproterozoic to Mississippian(?) Nome Complex provides key information for understanding deposit genesis and crustal evolution. A total of 106 new analyses of galena (and other sulfi des) and metasedimentary rocks hosting the...
Continuous uplift near the seaward edge of the Prince William Sound megathrust: Middleton Island, Alaska
James C. Savage, George Plafker, Jerry L. Svarc, Michael Lisowski
2014, Journal of Geophysical Research B: Solid Earth (119) 6067-6079
Middleton Island, located at the seaward edge of the continental shelf 50 km from the base of the inner wall of the Aleutian Trench, affords an opportunity to make land-based measurements of uplift near the toe of the Prince William Sound megathrust, site of the 1964, M = 9.2, Alaska earthquake. Leveling surveys...
A multiscale assessment of tree avoidance by prairie birds
Sarah J. Thompson, Todd W. Arnold, Courtney L. Amundson
2014, The Condor (116) 303-315
In North America, grassland bird abundances have declined, likely as a result of loss and degradation of prairie habitat. Given the expense and limited opportunity to procure new grasslands, managers are increasingly focusing on ways to improve existing habitat for grassland birds, using techniques such as tree removal. To examine...
InSAR detects increase in surface subsidence caused by an Arctic tundra fire
Lin Liu, Elchin E. Jafarov, Kevin M. Schaefer, Benjamin M. Jones, Howard A. Zebker, Christopher A. Williams, John Rogan, Tingjun Zhang
2014, Geophysical Research Letters (41) 3906-3913
Wildfire is a major disturbance in the Arctic tundra and boreal forests, having a significant impact on soil hydrology, carbon cycling, and permafrost dynamics. This study explores the use of the microwave Interferometric Synthetic Aperture Radar (InSAR) technique to map and quantify ground surface subsidence caused by the Anaktuvuk River...
The 3D Elevation Program: summary for Oklahoma
William J. Carswell Jr.
2014, Fact Sheet 2014-3053
Elevation data are essential to a broad range of applications, including forest resources management, wildlife and habitat management, national security, recreation, and many others. For the State of Oklahoma, elevation data are critical for flood risk management, infrastructure and construction management, agriculture and precision farming, natural resources conservation, wildlife and...
Proterozoic geochronological links between the Farewell, Kilbuck, and Arctic Alaska terranes
Dwight Bradley, William C. McClelland, Richard M. Friedman, Paul B. O'Sullivan, Paul Layer, Marti L. Miller, Julie A. Dumoulin, Alison B. Till, J. Grant Abbott, Dan B. Bradley, Joseph L. Wooden
2014, The Journal of Geology (122) 237-258
New U-Pb igneous and detrital zircon ages reveal that despite being separated by younger orogens, three of Alaska’s terranes that contain Precambrian rocks—Farewell, Kilbuck, and Arctic Alaska—are related. The Farewell and Kilbuck terranes can be linked by felsic magmatism at ca. 850 Ma and by abundant detrital zircons in the...
Geologic framework for the national assessment of carbon dioxide storage resources: Alaska North Slope and Kandik Basin, Alaska
William H. Craddock, Marc L. Buursink, Jacob A. Covault, Sean T. Brennan, Colin A. Doolan, Ronald M. Drake II, Matthew D. Merrill, Tina L. Roberts-Ashby, Ernie R. Slucher, Peter D. Warwick, Madalyn S. Blondes, P.A. Freeman, Steven M. Cahan, Christina A. DeVera, Celeste D. Lohr
Peter D. Warwick, M.D. Corum, editor(s)
2014, Open-File Report 2012-1024-I
This report presents fourteen storage assessment units (SAUs) from the Alaska North Slope and two SAUs from the Kandik Basin of Alaska. The Alaska North Slope is a broad, north-dipping coastal plain that is underlain by a thick succession of sedimentary rocks that accumulated steadily throughout much of the Phanerozoic...
Simulating future residential property losses from wildfire in Flathead County, Montana
Tony Prato, Travis B Paveglio, Yan Barnett, Robin Silverstein, Michael Hardy, Robert Keane, Rachel A. Loehman, Anthony Clark, Daniel B. Fagre, Tyron Venn, Keith Stockmann
2014, Book chapter, Advances in environmental research
Wildfire damages to private residences in the United States and elsewhere have increased as a result of expansion of the wildland-urban interface (WUI) and other factors. Understanding this unwelcome trend requires analytical frameworks that simulate how various interacting social, economic, and biophysical factors influence those damages. A methodological framework is...
Use of genetic data to infer population-specific ecological and phenotypic traits from mixed aggregations
Paul Moran, Jeffrey F. Bromaghin, Michele Masuda
2014, PLoS ONE (9)
Many applications in ecological genetics involve sampling individuals from a mixture of multiple biological populations and subsequently associating those individuals with the populations from which they arose. Analytical methods that assign individuals to their putative population of origin have utility in both basic and applied research, providing information about population-specific...
Using a Bayesian Network to predict shore-line change vulnerability to sea-level rise for the coasts of the United States
Benjamin T. Gutierrez, Nathaniel G. Plant, Elizabeth A. Pendleton, E. Robert Thieler
2014, Open-File Report 2014-1083
Sea-level rise is an ongoing phenomenon that is expected to continue and is projected to have a wide range of effects on coastal environments and infrastructure during the 21st century and beyond. Consequently, there is a need to assemble relevant datasets and to develop modeling or other analytical approaches to...
Aggression and coexistence in female caribou
Floyd W. Weckerly, Mark A. Ricca
2014, Arctic (67) 189-195
Female caribou (Rangifer tarandus) are highly gregarious, yet there has been little study of the behavioral mechanisms that foster coexistence. Quantifying patterns of aggression between male and female, particularly in the only cervid taxa where both sexes grow antlers, should provide insight into these mechanisms. We asked if patterns of...
Spatial variability and landscape controls of near-surface permafrost within the Alaskan Yukon River Basin
Neal J. Pastick, M. Torre Jorgenson, Bruce K. Wylie, Joshua R. Rose, Matthew Rigge, Michelle Ann Walvoord
2014, Journal of Geophysical Research: Biogeosciences (119) 1244-1265
The distribution of permafrost is important to understand because of permafrost's influence on high-latitude ecosystem structure and functions. Moreover, near-surface (defined here as within 1 m of the Earth's surface) permafrost is particularly susceptible to a warming climate and is generally poorly mapped at regional scales. Subsequently, our objectives were to...
Development and characterization of 16 polymorphic microsatellite loci for the Alaska blackfish (Esociformes: Dallia pectoralis)
Matthew A. Campbell, George K. Sage, Rachel L. DeWilde, J. Andres López, Sandra L. Talbot
2014, Conservation Genetics Resources (6) 349-351
Blackfishes (Esociformes: Esocidae: Dallia), small fishes with relictual distributions, are unique in being the only primary freshwater fish genus endemic to Beringia. Although the number of species of Dallia is debated, disjunct populations and distinct mitochondrial divisions that predate the end of the last glacial maximum are apparent. We developed...
2010 Volcanic activity in Alaska, Kamchatka, and the Kurile Islands: Summary of events and response of the Alaska Volcano Observatory
Christina A. Neal, Julie Herrick, O.A. Girina, Marina Chibisova, Alexander Rybin, Robert G. McGimsey, Jim Dixon
2014, Scientific Investigations Report 2014-5034
The Alaska Volcano Observatory (AVO) responded to eruptions, possible eruptions, volcanic unrest or suspected unrest at 12 volcanic centers in Alaska during 2010. The most notable volcanic activity consisted of intermittent ash emissions from long-active Cleveland volcano in the Aleutian Islands. AVO staff also participated in hazard communication regarding eruptions...
Prevalence, transmission, and genetic diversity of blood parasites infecting tundra-nesting geese in Alaska
Andrew M. Ramey, John A. Reed, Joel A. Schmutz, Tom F. Fondell, Brandt W. Meixell, Jerry W. Hupp, David H. Ward, John Terenzi, Craig R. Ely
2014, Canadian Journal of Zoology (92) 699-706
A total of 842 blood samples collected from five species of tundra-nesting geese in Alaska was screened for haemosporidian parasites using molecular techniques. Parasites of the generaLeucocytozoon Danilewsky, 1890, Haemoproteus Kruse, 1890, and Plasmodium Marchiafava and Celli, 1885 were detected in 169 (20%), 3 (<1%), and 0 (0%) samples, respectively. Occupancy modeling was used to...
Temperature data acquired from the DOI/GTN-P Deep Borehole Array on the Arctic Slope of Alaska, 1973-2013
Gary D. Clow
2014, Earth System Science Data (6) 201-218
A homogeneous set of temperature measurements obtained from the DOI/GTN-P Deep Borehole Array between 1973 and 2013 is presented; DOI/GTN-P is the US Department of the Interior contribution to the Global Terrestrial Network for Permafrost (GTN-P). The 23-element array is located on the Arctic Slope of Alaska, a region of cold...
Low-altitude photographic transects of the Arctic Network of National Park Units and Selawik National Wildlife Refuge, Alaska, July 2013
Bruce G. Marcot, M. Torre Jorgenson, Anthony R. DeGange
2014, Data Series 846
During July 16–18, 2013, low-level photography flights were conducted (with a Cessna 185 with floats and a Cessna 206 with tundra tires) over the five administrative units of the National Park Service Arctic Network (Bering Land Bridge National Preserve, Cape Krusenstern National Monument, Gates of the Arctic National Park and...
Three-dimensional seismic velocity structure and earthquake relocations at Katmai, Alaska
Rachel Murphy, Clifford Thurber, Stephanie G. Prejean, Ninfa Bennington
2014, Journal of Volcanology and Geothermal Research (276) 121-131
We invert arrival time data from local earthquakes occurring between September 2004 and May 2009 to determine the three-dimensional (3D) upper crustal seismic structure in the Katmai volcanic region. Waveforms for the study come from the Alaska Volcano Observatory's permanent network of 20 seismic stations in the area (predominantly single-component,...
Seismicity and seismic structure at Okmok Volcano, Alaska
Summer J. Ohlendorf, Clifford H. Thurber, Jeremy D. Pesicek, Stephanie G. Prejean
2014, Journal of Volcanology and Geothermal Research (278-279) 103-119
Okmok volcano is an active volcanic caldera located on the northeastern portion of Umnak Island in the Aleutian arc, with recent eruptions in 1997 and 2008. The Okmok area had ~900 locatable earthquakes between 2003 and June 2008, and an additional ~600 earthquakes from the beginning of the 2008 eruption...
Accuracy assessment of the U.S. Geological Survey National Elevation Dataset, and comparison with other large-area elevation datasets: SRTM and ASTER
Dean B. Gesch, Michael J. Oimoen, Gayla A. Evans
2014, Open-File Report 2014-1008
The National Elevation Dataset (NED) is the primary elevation data product produced and distributed by the U.S. Geological Survey. The NED provides seamless raster elevation data of the conterminous United States, Alaska, Hawaii, U.S. island territories, Mexico, and Canada. The NED is derived from diverse source datasets that are processed...
The search for geologic evidence of distant-source tsunamis using new field data in California
Rick Wilson, Eileen Hemphill-Haley, Bruce Jaffe, Bruce Richmond, Robert Peters, Nick Graehl, Harvey Kelsey, Robert Leeper, Steve Watt, Mary McGann, Don F. Hoirup, Catherine Chagué-Goff, James Goff, Dylan Caldwell, Casey Loofbourrow
2014, Open-File Report 2013-1170-C
A statewide assessment for geological evidence of tsunamis, primarily from distant-source events, found tsunami deposits at several locations, though evidence was absent at most locations evaluated. Several historical distant-source tsunamis, including the 1946 Aleutian, 1960 Chile, and 1964 Alaska events, caused inundation along portions of the northern and central California...
