Summary of data concerning radiological contamination at well PM-2, Nevada Test Site, Nye County, Nevada
G.M. Russell, G.L. Locke
1997, Open-File Report 96-599
Analysis of water collected during August and September 1993 from well PM-2, on Pahute Mesa at\x11the Nevada Test Site, indicated tritium concentrations of\x1121,000 Bq/L at 610 m below land surface. The Schooner event (U-20u) was detonated in 1968 approximately 270 meterssoutheast of well PM-2 at a working...
Programa de Informacion de Uso de Agua en Puerto Rico:Uso de Abastos de Agua Publicos y Disposicion de Aguas Usadas Durante el Ano de 1990
Wanda L. Molina-Rivera
1997, Fact Sheet 098-96
The variability of PSV response spectra across a dense array deployed during the Northridge aftershock sequence
Edward H. Field, Susan E. Hough
1997, Earthquake Spectra (13) 243-257
This study addresses the variability of pseudo-velocity response spectra across an array deployed on stiff soil in the San Fernando Valley during the Northridge (Mw 6.7) aftershock sequence. The separation between stations ranged from 0.5 to 5 km, and the aftershock magnitudes ranged from 2.3 to 4.0. We find that...
Geomorphic influences on the distribution of Yellowstone cutthroat trout in the Absaroka Mountains, Wyoming
C.G. Kruse, W.A. Hubert, F.J. Rahel
1997, Transactions of the American Fisheries Society (126) 418-427
Influences of large‐scale abiotic, geomorphic characteristics on distributions of Yellowstone cutthroat trout Oncorhynchus clarki bouvieri are poorly understood. We sampled 151 sites on 56 perennial streams in the Greybull–Wood river drainage in northwestern Wyoming to determine the effects of geomorphic variables on Yellowstone cutthroat trout distributions. Channel slope, elevation,...
Cross sections showing stratigraphic and depositional lithofacies of upper Cambrian rocks and the relation of lithofacies to potential for Mississippi Valley-type mineralization in the Harrison 1° x 2° quadrangle, Missouri and Arkansas (folio of the Harrison 1 degree by 2 degrees quadrangle, Missouri and Arkansas)
Timothy S. Hayes, James R. Palmer, Walden P. Pratt, Gary Krizanich, John W. Whitfield, Cheryl M. Seeger
1997, Miscellaneous Field Studies Map 1994-E
These cross sections are the fifth publication in a folio of maps of the Harrison 1° x 2° quadrangle, Missouri and Arkansas, prepared under the Conterminous United States Mineral Assessment Program (CUSMAP). Previously published maps in this folio relate to the geochemistry of the subsurface carbonate rocks (Erickson and others,...
Late Quaternary surface faulting on the Cheraw Fault, southeastern Colorado
A. J. Crone, N.M. Machette, Lee-Ann Bradley, S. A. Mahan
1997, IMAP 2591
Maps showing sedimentary and biological environments, depth to Pleistocene bedrock, and Holocene sediment and reef thickness from Molasses Reef to Elbow Reef, Key Largo, south Florida
B. H. Lidz, E.A. Shinn, M. E. Hansen, R. B. Halley, M.W. Harris, S. D. Locker, A. C. Hine
1997, IMAP 2505
Conditions for the return and simulation of the recovery of burrowing mayflies in western Lake Erie
Cynthia S. Kolar, Patrick L. Hudson, Jacqueline F. Savino
1997, Ecological Applications (7) 665-676
In the 1950s, burrowing mayflies, Hexagenia spp. (H. limbata and H. rigida), were virtually eliminated from the western basin of Lake Erie (a 3300 km2 area) because of eutrophication and pollution. We develop and present a deterministic model for the recolonization of the western basin by Hexagenia to pre-1953 densities. The model was based on the logistic...
Survey and assessment of amphibian populations in Rocky Mountain National Park
Paul Stephen Corn, Michael L. Jennings, Erin L. Muths
1997, Northwestern Naturalist (78) 34-55
We conducted surveys in Rocky Mountain National Park, Colorado for amphibians in 1987-1994. Four species, Ambystoma tigrinum, Bufo boreas, Pseudacris maculata, and Rana sylvatica, were recorded. Pseudacris maculata was the most widely distributed and abundant species in the Park. Two populations of E maculata were estimated to contain 161 and...
Bedrock geologic map of northern New Jersey
Avery Drake Jr., Richard A. Volkert, Donald H. Monteverde, Gregory C. Herman, Hugh F. Houghton, Ronald A. Parker, Richard F. Dalton
1997, IMAP 2540-A
Geology and resource assessment of Costa Rica at 1:500,000 scale; a digital representation of maps of the U.S. Geological Survey's 1987 folio I-1865
Paul G. Schruben
1997, Data Series 19-R
This CD-ROM contains digital versions of the geology and resource assessment maps of Costa Rica originally published in USGS Folio I-1865 (U.S. Geological Survey, the Direccion General de Geologia, Minas e Hidrocarburos, and the Universidad de Costa Rica, 1987) at a scale of 1:500,000. The following layers are available on...
The prairies of coastal Texas and Adadiana
Larry K. Allain, Stephen R. Johnson
1997, Wildflower (13) 42-45
No abstract available....
Activities Related to American Indians and Alaska Natives; Fiscal Year 1997
U.S. Geological Survey
1997, Report
IntroductionThis report primarily describes activities during Federal fiscal year (FY) 1997. During FY 1997, the USGS engaged in cooperative research projects, data collection, informal outreach, and work done under Memoranda of Understanding that related to American Indians or Alaska Natives. Some work was technical and/or research-oriented. Other work was educational....
Community involvement in a multimedia outreach project for Caddo Lake, Texas
Scott A. Wilson, Carroll L. Cordes
1997, Conference Paper, 1997 ACSM/ASPRS Annual Convention & Exposition Technical Papers
Caddo Lake is located in northeast Texas and northwest Louisiana and is the largest freshwater lake in Texas. A portion of the lake in Texas has been designated a "Wetland of International Significance" under the Ramsar Convention of the United Nations. The human community in the watershed has experienced a...
Water-level changes in response to the 20 December 1994 earthquake near Parkfield, California
Eddie Quilty, Evelyn A. Roeloffs
1997, Bulletin of Seismological Society of America (87) 310-317
We analyze co-seismic changes of water level in nine wells near Parkfield, California, produced by an MD 4.7 earthquake on 20 December 1994 in order to test the hypothesis that co-seismic water-level changes are proportional to co-seismic volumetric strain. For each well, a quantitative relationship between water level and volumetric strain can...
Evaluation of streamwater quality in the Atlanta region
Norman E. Peters, Stephen J. Kandell
Kathryn J. Hatcher, editor(s)
1997, Conference Paper, Proceedings of the 1997 Georgia Water Resources Conference: March 20-22, 1997, Athens, Georgia
A water-quality index (WQI) was developed from historical data for streams in the Atlanta region. The WQI was derived from percentile ranks of individual water-quality parameter values at each stream by normalizing the constituent ranks for values from all sites in the area for the period from 1990 to 1995....
A strategy for monitoring glaciers
Andrew G. Fountain, Robert M. Krimmel, Dennis C. Trabant
1997, Circular 1132
Glaciers are important features in the hydrologic cycle and affect the volume, variability, and water quality of runoff. Assessing and predicting the effect of glaciers on water resources require a monitoring program to provide basic data for this understanding. The monitoring program of the U.S. Geological Survey employs a nested...
Use of habitats by female northern pintails wintering in southwestern Louisiana
Robert R. Cox Jr., Alan D. Afton
1997, Journal of Wildlife Management (61) 435-443
The breeding population of norther pintails (Anas acuta) in 1996 was 39% below the long-term average. Because winter habitat quality may influence subsequent breeding population size in pintails, identification of habitats used by wintering pintails and factors influencing use of habitats may be important for managing for population increase. We...
Geologic map of the western Salmon River Mountains, Valley and Idaho counties, west-central Idaho
Karen Lund, M. A. Kuntz, C.A. Manduca, C.H. Gammons, K. V. Evans, R. G. Tysdal, G. R. Winkler, J. J. Connor
1997, IMAP 2599
No abstract available....
Use of lodgepole pine cover types by Yellowstone grizzly bears
David J. Mattson
1997, Journal of Wildlife Management (61) 480-496
Lodgepole pine (Pinus contorta) forests are a large and dynamic part of grizzly bear (Ursus arctos) habitat in the Yellowstone ecosystem. Research in other areas suggests that grizzly bears select for young open forest stands, especially for grazing and feeding on berries. Management guidelines accordingly recommend timber harvest as a...
Sea otter mortality from the Exxon Valdez spill: Evaluation of an estimate from boat-based surveys
David L. Garshelis, James A. Estes
1997, Marine Mammal Science (13) 341-351
The Exxon Valadez oil spill killed large numbers of sea otters (Enhydra lutris) in Prince William Sound (PWS), Alaska, where the spill originated, as well as within the oil’s path along the coasts of the Kenai Peninsula and Kodiak Island. Sea otters attracted particular attention after the spill due to...
Statistical power analysis in wildlife research
Robert J. Steidl, John P. Hayes, Eric Schauber
1997, Journal of Wildlife Management (61) 270-279
Statistical power analysis can be used to increase the efficiency of research efforts and to clarify research results. Power analysis is most valuable in the design or planning phases of research efforts. Such prospective (a priori) power analyses can be used to guide research design and to estimate the number...
Triassic plutonism in southern California: Southward younging of arc initiation along a truncated continental margin
A. P. Barth, R. M. Tosdal, J. L. Wooden, K. A. Howard
1997, Tectonics (16) 290-304
Earliest Cordilleran magmatism in the southwestern United States is recorded by a belt of Triassic plutons that intrude Proterozoic basement of the Mojave crustal province and its cratonal/miogeoclinal cover. The belt extends from the western Mojave Desert through the Transverse Ranges to the Colorado River trough. Triassic plutons are predominantly...
Bedrock geologic map of Hubbard Brook Experimental Forest and maps of fractures and geology in roadcuts along Interstate 93, Grafton County, New Hampshire
Christopher Cramer Barton
1997, IMAP 2562
No abstract available....
Status of sea otters (Enhydra lutris) in Mexico
Juan-Pablo Gallo-Reynoso, Galen B. Rathbun
1997, Marine Mammal Science (13) 332-340
Sea otters in North America historically were distributed from the Near Islands in the western Aleutian Archipelago to about Punta Morro Hermoso on the Pacific coast of Baja California (Kenyon 1969, Rodriguez-Jaramillo and Gendron 1996). During the 18th and 19th centuries they were so common that they formed the basis...
