Publications
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Magnetic mineralogy of sediments in Bear Lake and its watershed, Utah, Idaho, and Wyoming: Support for paleoenvironmental and paleomagnetic interpretations
No abstract available.
Authors
Richard L. Reynolds, Joseph G. Rosenbaum
Topogrid Derived 10 Meter Resolution Digital Elevation Model of Charleston, and Parts of Berkeley, Colleton, Dorchester and Georgetown Counties, South Carolina
EXPLANATION
The purpose of developing a new 10m resolution digital elevation model (DEM) of the Charleston Region was to more accurately depict geologic structure, surfical geology, and landforms of the Charleston County Region. Previously, many areas northeast and southwest of Charleston were originally mapped with a 20 foot contour interval. As a result, large areas within the National Elevat
Authors
Peter G. Chirico
Late Quaternary eolian and alluvial response to paleoclimate, Canyonlands, southeastern Utah
In upland areas of Canyonlands National Park, Utah, thin deposits and paleosols show late Quaternary episodes of eolian sedimentation, pedogenesis, and climate change. Interpretation of the stratigraphy and optically stimulated luminescence ages of eolian and nearby alluvial deposits, their pollen, and intercalated paleosols yields the following history: (1) Eolian deposition at ca. 46 ka, followe
Authors
M. C. Reheis, R. L. Reynolds, H. Goldstein, H.M. Roberts, J.C. Yount, Y. Axford, L.S. Cummings, N. Shearin
Unusually low rates of slip on the Santa Rosa Range fault zone, northern Nevada
The Santa Rosa Range fault zone (SRRFZ) is one of the most topographically prominent normal fault systems in the northern Basin and Range province of the western United States. It has been assigned high rates of vertical slip by others and has been identified as a possible site of the future extension of the central Nevada seismic belt (CNSB). We use detailed trench mapping and luminescence dating
Authors
S. F. Personius, S. A. Mahan
Topographic, bioclimatic, and vegetation characteristics of three ecoregion classification systems in North America: Comparisons along continent-wide transects
Ecoregion classification systems are increasingly used for policy and management decisions, particularly among conservation and natural resource managers. A number of ecoregion classification systems are currently available, with each system defining ecoregions using different classification methods and different types of data. As a result, each classification system describes a unique set of ecor
Authors
R.S. Thompson, S.L. Shafer, K. H. Anderson, L.E. Strickland, R.T. Pelltier, P. J. Bartlein, M.W. Kerwin
The Younger Dryas phase of Great Salt Lake, Utah, USA
Field investigations at the Public Shooting Grounds (a wildlife-management area on the northeastern shore of Great Salt Lake) and radiocarbon dating show that the Great Salt Lake rose to the Gilbert shoreline sometime between 12.9 and 11.2 cal ka. We interpret a ripple-laminated sand unit exposed at the Public Shooting Grounds, and dated to this time interval, as the nearshore sediments of Great S
Authors
Charles G. Oviatt, D. M. Miller, J. P. McGeehin, C. Zachary, S. Mahan
Fabric and texture at Siple Dome, Antarctica
Preferred c-axis orientations are present in the firn at Siple Dome, West Antarctica, and recrystallization begins as shallow as 200 m depth in ice below –20°C, based on digital analysis of c-axis fabrics, grain-sizes and other characteristics of 52 vertical thin sections prepared in the field from the kilometer-long Siple Dome ice core. The shallowest section analyzed, from 22 m, shows clustering
Authors
C. L. Diprinzio, Lawrence A. Wilen, R. B. Alley, J. J. Fitzpatrick, M. K. Spencer, A. J. Gow
Validation of abundance estimates from mark–recapture and removal techniques for rainbow trout captured by electrofishing in small streams
Estimation of fish abundance in streams using the removal model or the Lincoln - Peterson mark - recapture model is a common practice in fisheries. These models produce misleading results if their assumptions are violated. We evaluated the assumptions of these two models via electrofishing of rainbow trout Oncorhynchus mykiss in central Idaho streams. For one-, two-, three-, and four-pass sampling
Authors
Amanda E. Rosenberger, Jason B. Dunham
U-Series isotopes as indicators of water/rock interaction in the unsaturated zone at Yucca Mountain, Nevada, USA
No abstract available.
Authors
James B. Paces, Leonid A. Neymark
Constraints on the geological history of the karst system in Southern Missouri, U.S.A. provided by radiogenic, cosmogenic and physical/chemical characteristics of doline fill
The Ozark Plateaus region of southern Missouri is underlain by dominantly carbonate marine platform rocks of Paleozoic age. The region has been sub-aerially exposed since the late Paleozoic and is characterized by extensive karst. To better understand the geologic history of this regional karst system, we examined the stratigraphic record preserved in the fill of a large doline near the largest sp
Authors
David J. Waery, Richard W. Harrison, Robert B. Jacobson, Milan P. Javich, Shannon A. Mahan, David Wronkiewicz
Environments of northwestern North America before the last glacial maximum
No abstract available.
Authors
John J. Clague, Rolf Mathewes, Thomas A. Ager
Topogrid Derived 10 Meter Resolution Digital Elevation Model of the Shenandoah National Park and Surrounding Region, Virginia
Explanation
The purpose of developing a new 10m resolution DEM of the Shenandoah National Park Region was to more accurately depict geologic structure, surfical geology, and landforms of the Shenandoah National Park Region in preparation for automated landform classification. Previously, only a 30m resolution DEM was available through the National Elevation Dataset (NED). During production of t
Authors
Peter G. Chirico, Seth D. Tanner