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: 3084
Use of Landsat MSS and TM imagery to improve reconnaissance geologic mapping in the Ruby quadrangle, west-central Alaska: A section in Geological studies in Alaska by the U.S. Geological Survey, 1999 Use of Landsat MSS and TM imagery to improve reconnaissance geologic mapping in the Ruby quadrangle, west-central Alaska: A section in Geological studies in Alaska by the U.S. Geological Survey, 1999
By using Multispectral Scanner (MSS) and Thematic Mapper (TM) satellite images, the spatial relation of units JMtu (mafic, ultramafic, and sedimentary rocks, undivided) and PzZrqs (pelitic and quartzitic schist) of Wilson and others (1998) from the northeastern portion of the Ruby 1:250,000-scale quadrangle geologic map was further defined. The MSS image was first analyzed using spectral
Authors
Keith A. Labay, Frederic H. Wilson, Kuuipo A. Burleigh
Patterns of mammalian species richness and habitat associations in Pennsylvania Patterns of mammalian species richness and habitat associations in Pennsylvania
Landscape variables were employed as indices of habitat heterogeneity, fragmentation, and human influence on the environment to characterize constituent units of a 635 km2 grid covering the state of Pennsylvania. Species richness was determined by overlaying the distributions of all 60 terrestrial mammalian species found within the state. All landscape variables investigated were...
Authors
Kyle Joly, W.L. Myers
Sea otter studies in Glacier Bay National Park and Preserve: Aerial surveys, foraging observations, and intertidal clam sampling Sea otter studies in Glacier Bay National Park and Preserve: Aerial surveys, foraging observations, and intertidal clam sampling
Following translocations to the outer coast of Southeast Alaska in 1965, sea otters have been expanding their range and increasing in abundance. We began conducting surveys for sea otters in Cross Sound, Icy Strait and Glacier Bay, Alaska in 1994, following initial reports of their presence in Glacier Bay in 1993. Since 1995, the number of sea otters in Glacier Bay proper has increased...
Authors
James L. Bodkin, Kimberly A. Kloecker, George G. Esslinger, Daniel H. Monson, J.D. DeGroot
Stratigraphy and lithofacies of Lisburne Group carbonate rocks (Carboniferous - Permian) in the National Petroleum Reserve - Alaska Stratigraphy and lithofacies of Lisburne Group carbonate rocks (Carboniferous - Permian) in the National Petroleum Reserve - Alaska
Carbonate rocks of the Lisburne Group (Carboniferous-Permian) occur widely throughout northern Alaska. In the NPRA, seismic mapping and well penetrations show that the Lisburne occurs throughout the subsurface except in northernmost NPRA where it is missing by depositional onlap. Lisburne strata encountered in 11 exploratory wells in the northern part of the NPRA are essentially...
Authors
Julie A. Dumoulin, Kenneth J. Bird
Microsatellite analyses of San Franciscuito Creek rainbow trout Microsatellite analyses of San Franciscuito Creek rainbow trout
Microsatellite genetic diversity found in San Francisquito Creek rainbow trout support a close genetic relationship with rainbow trout (Oncorhynchus mykiss) from another tributary of San Francisco Bay, Alameda Creek, and coastal trout found in Lagunitas Creek, Marin County, California. Fish collected for this study from San Francisquito Creek showed a closer genetic relationship to fish...
Authors
Jennifer L. Nielsen
Spectacled Eider (Somateria fischeri) Spectacled Eider (Somateria fischeri)
No abstract available.
Authors
Margaret R. Petersen, J. Barry Grand, Christian P. Dau
Survival of adult murres and kittiwakes in relation to forage fish abundance Survival of adult murres and kittiwakes in relation to forage fish abundance
Some seabird populations damaged by the Exxon Valdez oil spill continue to decline or are not recovering. In order to understand the ultimate cause of seabird population fluctuations, we must measure productivity, recruitment, and adult survival. Recent APEX studies focused on measuring productivity only. Recruitment measurement demands an unrealistic study duration. We propose to...
Authors
John F. Piatt
Migration of the Acadian Orogen and foreland basin across the Northern Appalachians of Maine and adjacent areas Migration of the Acadian Orogen and foreland basin across the Northern Appalachians of Maine and adjacent areas
The timing of Acadian orogenesis in Maine is reassessed, on the basis of a new Silurian-Devonian time scale, new U/Pb and 40Ar/39Ar ages of Acadian plutons, new conodont and palynomorph ages of strata that constrain the age of deformation, and published information. This analysis shows that the Acadian deformation front migrated some 240 km (present distance) from southeast to northwest...
Authors
Dwight Culver Bradley, Robert D. Tucker, Daniel R. Lux, Anita G. Harris, D. Colin McGregor
Alaska resource data file: Unimak quadrangle Alaska resource data file: Unimak quadrangle
No abstract available.
Authors
Steven H. Pilcher
Alaska resource data file: Ugashik quadrangle Alaska resource data file: Ugashik quadrangle
No abstract available.
Authors
Steven H. Pilcher
Alaska resource data file: Bristol Bay quadrangle Alaska resource data file: Bristol Bay quadrangle
No abstract available.
Authors
Steven H. Pilcher
Alaska resource data file: Sutwik Island quadrangle Alaska resource data file: Sutwik Island quadrangle
No abstract available.
Authors
Steven H. Pilcher