Publications
USGS research activities relevant to Alaska have yielded more than 9400 historical publications. This page features some of the most recent newsworthy research findings.
Filter Total Items: 3088
Holocene slip rate and revised characteristic earthquake parameters for the western segment of the Castle Mountain fault, Alaska Holocene slip rate and revised characteristic earthquake parameters for the western segment of the Castle Mountain fault, Alaska
The western segment of the Castle Mountain fault poses a significant seismic hazard to the most populated region of south-central Alaska. We identify a previously unrecognized margin of a postglacial outwash channel that is offset right laterally 36 ± 4 m across the western segment of the Castle Mountain fault. This offset occurred after glaciers withdrew from the lowland 11,300–15,380...
Authors
Julie B. Willis, Peter J. Haeussler, Ronald L. Bruhn, Grant C. Willis
Oceanography of Glacier Bay, Alaska: Implications for biological patterns in a glacial fjord estuary Oceanography of Glacier Bay, Alaska: Implications for biological patterns in a glacial fjord estuary
Alaska, U.S.A, is one of the few remaining locations in the world that has fjords that contain temperate idewater glaciers. Studying such estuarine systems provides vital information on how deglaciation affects oceanographic onditions of fjords and surrounding coastal waters. The oceanographic system of Glacier Bay, Alaska, is of particular interest ue to the rapid deglaciation of the...
Authors
L.L. Etherington, P.N. Hooge, Elizabeth Ross Hooge, D.F. Hill
Activity budgets derived from time-depth recorders in a diving mammal Activity budgets derived from time-depth recorders in a diving mammal
We describe a method to convert continuously collected time–depth data from archival time–depth recorders (TDRs) into activity budgets for a benthic-foraging marine mammal. We used data from 14 TDRs to estimate activity-specific time budgets in sea otters (Enhydra lutris) residing near Cross Sound, southeast Alaska, USA. From the TDRs we constructed a continuous record of behavior for...
Authors
James L. Bodkin, Daniel H. Monson, George G. Esslinger
USGS national surveys and analysis projects: Preliminary compilation of integrated geological datasets for the United States: A section in Digital mapping techniques '06 - Workshop proceedings USGS national surveys and analysis projects: Preliminary compilation of integrated geological datasets for the United States: A section in Digital mapping techniques '06 - Workshop proceedings
The growth in the use of Geographic Information Systems (GIS) has highlighted the need for regional and national digital geologic maps attributed with age and rock type information. Such spatial data can be conveniently used to generate derivative maps for purposes that include mineral-resource assessment, metallogenic studies, tectonic studies, human health and environmental research...
Authors
Suzanne W. Nicholson, Douglas B. Stoeser, Frederic H. Wilson, Connie L. Dicken, Stephen Ludington
By
Geology, Energy, and Minerals Mission Area, Ecosystems Mission Area, Energy Resources Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Geology, Energy & Minerals Science Center, Geology, Minerals, Energy, and Geophysics Science Center, Geology, Geophysics, and Geochemistry Science Center, Alaska Science Center
Optimizing nest survival and female survival: Consequences of nest site selection for Canada Geese Optimizing nest survival and female survival: Consequences of nest site selection for Canada Geese
We examined the relationship between attributes of nest sites used by Canada Geese (Branta canadensis) in the Copper River Delta, Alaska, and patterns in nest and female survival. We aimed to determine whether nest site attributes related to nest and female survival differed and whether nest site attributes related to nest survival changed within and among years. Nest site attributes...
Authors
David A. Miller, J.B. Grand, T.F. Fondell, R. Michael Anthony
Spatial distribution of juvenile and adult female Tanner crabs (Chionoecetes bairdi) in a glacial fjord ecosystem: Implications for recruitment processes Spatial distribution of juvenile and adult female Tanner crabs (Chionoecetes bairdi) in a glacial fjord ecosystem: Implications for recruitment processes
A systematic pot survey in Glacier Bay, Alaska, was conducted to characterize the spatial distribution of juvenile and adult female Tanner crabs, and their association with depth and temperature. The information was used to infer important recruitment processes for Tanner crabs in glaciated ecosystems. High-catch areas for juvenile and adult female Tanner crabs were identified using...
Authors
J.K. Nielsen, S. James Taggart, Thomas C. Shirley, Jennifer Mondragon
Marine mammal populations Marine mammal populations
No abstract available.
Authors
Alan M. Springer, Sara J. Iverson, James L. Bodkin
Genetic characterization of Common Eiders breeding in the Yukon-Kuskokwim Delta, Alaska Genetic characterization of Common Eiders breeding in the Yukon-Kuskokwim Delta, Alaska
We assessed population genetic subdivision among four colonies of Common Eiders (Somateria mollissima v-nigrum) breeding in the Yukon-Kuskokwim Delta (YKD), Alaska, using microsatellite genotypes and DNA sequences with differing modes of inheritance. Significant, albeit low, levels of genetic differentiation were observed between mainland populations and Kigigak Island for nuclear intron...
Authors
Sarah A. Sonsthagen, Sandra L. Talbot, Kevin G. McCracken
Exhumation and continental strike-slip fault systems: Introduction Exhumation and continental strike-slip fault systems: Introduction
Metamorphic rocks adjacent to and within strike-slip faultsystems occur in a wide range of tectonic settings. Detailed studies show that for a number of these locales a significant part of the exhumation occurred during strike-slip fault motion, but the specific processes involved are often cryptic. Although some sites share characteristic features, such as metamorphic rocks exhumed in...
Authors
S. M. Roeske, A.B. Till, D.A. Foster, J.C. Sample
Major and Trace-Element Data from Stream-Sediment and Rock Samples Collected in the Taylor Mountains 1:250,000-Scale Quadrangle, Alaska Major and Trace-Element Data from Stream-Sediment and Rock Samples Collected in the Taylor Mountains 1:250,000-Scale Quadrangle, Alaska
In the summers of 2004, 2005, and 2006, the U.S. Geological Survey conducted a reconnaissance geochemical survey of the drainage basins throughout most of the Taylor Mountains 1:250,000-scale quadrangle, in southwestern Alaska. The purpose of the study was to locate areas of potential interest for ore minerals, provide data that may be used to determine regional-scale element baselines...
Authors
Elizabeth A. Bailey, Gregory K. Lee, Seth H. Mueller, Bronwen Wang, Zoe Ann Brown, Greg A. Beischer
Strategies for survival: Stellar sea lions, harbor seals and sea otters Chapter 4.9 Strategies for survival: Stellar sea lions, harbor seals and sea otters Chapter 4.9
No abstract available.
Authors
Alan M. Springer, Sara J. Iverson, James L. Bodkin
New technologies at the Desert Research Institute make a difference in wildland fire management New technologies at the Desert Research Institute make a difference in wildland fire management
No abstract available.
Authors
Timothy J. Brown, Crystal A. Kolden