Metamorphic and structural history of continental crust at a Mesozoic collisional margin, the Ruby terrane, central Alaska
S. M. Roeske, Cynthia Dusel-Bacon, John N. Aleinikoff, L.W. Snee, Marvin A. Lanphere
1995, Journal of Metamorphic Geology (13) 25-40
The Ruby terrane is an elongate fragment of continental crustal rocks that is structurally overlain by thrust slices of oceanic crust. Our results from the Kokrines Hills, in the south‐central part of the Ruby terrane, demonstrate that the low‐angle schistose fabric formed under high‐P/low‐T conditions, at peak conditions of 10.8‐13.2 kbar...
Response of northern pintail breeding populations to drought, 1961-1992
Jay B. Hestbeck
1995, Journal of Wildlife Management (59) 9-15
According to data from the 1960s, northern pintails (Anas acuta) fly north of the Alberta and Saskatchewan prairies during drought resulting in decreasing pintail annual production. Reanalysis of overflight and reduced-production hypotheses using data from 1961-92 indicated that, although the same basic relationships were present, these relationships changed over time....
Effects of diet on rate of body mass gain by wintering canvasbacks
Dennis G. Jorde, G. Michael Haramis, Christine M. Bunck, Grey W. Pendleton
1995, Journal of Wildlife Management (59) 31-39
Because habitat degradation has led to the loss of submerged vegetation in Chesapeake Bay, wintering canvasbacks (Aythya valisineria) have shifted from a plant diet of American wildcelery (Vallisneria americana) to an animal diet of Baltic clams (Macoma balthica). We conducted experiments with pen-reared canvasbacks (n = 32, 1990; n =...
A regional monitoring network to investigate the occurrence of agricultural chemicals in near-surface aquifers of the midcontinental USA
D.W. Kolpin, D. A. Goolsby
1995, Conference Paper, Proceedings of the Conference on Groundwater Quality--Remediation and Protection
Previous state and national surveys conducted in the mid-continental USA have produced a wide range in results regarding the occurrence of agricultural chemicals in groundwater. At least some of these differences can be attributed to inconsistencies between the surveys, such as different analytical reporting limits. The US...
On the measurement of plant competition intensity
James B. Grace
1995, Ecology (76) 305-308
No abstract available....
Glaciers: A water resource
Mark Meier, Austin Post
1995, Report
Most Americans have never seen a glacier, and most would say that glaciers are rare features found only in inaccessible, isolated wilderness mountains. Are they really so rare? Or are they really potentially important sources of water supply?...
Environmental contaminants in eggs of California least terns (Sterna antillarum browni)
Roger L. Hothem, Stephani G. Zador
1995, Bulletin of Environmental Contamination and Toxicology (55) 658-665
A severe decline in the coastal breeding population of California least terns (Sterna antillarum browni) in California and Baja California (U.S. Fish Wildl. Serv. 1980) prompted both State and Federal governments to designate it an endangered species in 1970 (Massey 1974). Significant losses of nesting and feeding habitat have contributed...
Ranges of North American breeding birds: visualizing long-term population changes in North American breeding birds
Jeff Price
1995, Report
These maps show changes in the distribution and abundance patterns of some North American birds for the last 20 years. For each species there are four maps, each representing the average distribution and abundance pattern over the five-year periods 1970-1974, 1975-1979, 1980-1984, and 1985-1989. The maps are based on data collected...
Middle Tertiary extension recorded by lacustrine fan-delta deposits, Plush Ranch Basin, western Transverse Ranges, California
Ronald B. Cole, Richard G. Stanley
1995, Journal of Sedimentary Research (65) 455-468
The Plush Ranch Formation (upper Oligocene and lower Miocene) consists of more than 1800 m of nonmarine sedimentary and volcanic rocks that record the history of an extensional basin referred to here as the Plush Ranch basin. Distinctive depositional facies, provenance, and sediment transport directions along each basin margin suggest...
Geochemical evaluation of coal from the Tertiary Usibelli Group, Usibelli mine, Alaska, one of the lowest sulfur coals mined in the United States
Ronald H. Affolter, Gary D. Stricker, Richard G. Stanley
1995, Conference Paper, Proceedings, Focus on Alaska Coal 1993: Mineral Industry Research Laboratory Report 94
The Nenana coal basin extends 240 km in length and 1.5-50 krn in width along the northern foothills of the Alaska Range in central Alaska. Located at the western end of the Nenana basin is the Usibelli Coal Mine, approximately 120 km southwest of Fairbanks. The Tertiary Usibelli Group consists...
Serotypes and DNA fingerprint profiles of Pasteurella multocida isolated from raptors
M. A. Wilson, R. M. Duncan, G.E. Nordholm, B.M. Berlowski
1995, Avian Diseases (39) 94-99
Pasteurella multocida isolates from 21 raptors were examined by DNA fingerprint profile and serotyping methods. Isolates were obtained from noncaptive birds of prey found in 11 states from November 28, 1979, through February 10, 1993. Nine isolates were from bald eagles, and the remaining isolates were from hawks, falcons, and...
Distribution of phytobenthos in the Yakima River basin, Washington, in relation to geology, land use and other environmental factors
Harry V. Leland
1995, Canadian Journal of Fisheries and Aquatic Sciences (52) 1108-1129
Benthic-algal distributions in the Yakima River, Washington, basin were, examined in relation to geology, land use, water chemistry, and stream habitat using indicator-species classification (TWINSPAN) and canonical correspondence analysis (CCA). Algal assemblages identified byTWINSPAN were each associated with a narrow range of water-quality conditions. In the Cascade geologic province,...
Effects of fish density and relative abundance on competition between larval lake herring and lake whitefish for zooplankton
Thomas N. Todd, Bruce M. Davis
1995, Book chapter, Biology and Management of Coregonid Fishes -- 1993
Competition for zooplankton between larval lake herring (Coregonus artedi) and lake whitefish (C. clupeaformis) was compared in mesocosm experiments in a small lake. Both species were combined in test enclosures at relative abundances of 1:1 or 1:4 lake herring to lake whitefish at densities of 500; 1, 000; and 2,...
Earthquake induced seismicity: evidence from the Ms7.4 landers, earthquake and the Geysers geothermal field, California
J.S. Gomberg
1995, Book, Proceedings of the NATO Advanced Research Workshop on Inducing of Earthquakes by Underground Nuclear Explosions: Environmental and Ecological Problems
No abstract available....
The effects of temperature on sex determination in the bloater Coregonus hoyi: a hypothesis test
Gary W. Eck, Jeffrey D. Allen
1995, Book chapter, Biology and Management of Coregonid Fishes -- 1993
The hypothesis that temperature was an epigamic factor in bloater (Coregonus hoyi) sex determination in Lake Michigan was tested by rearing bloater larvae in the laboratory at 6, 11, and 15 degrees C for the first 80 days after hatching. The percentages of females of fish exposed to the three...
Aquifer test in a complex drift aquifer system, west-central Minnesota
G. N. Delin
1995, Hydrological Science and Technology (11) 1-13
No abstract available....
Topography of closed depressions, scarps, and grabens in the North Tharsis region of Mars: implications for shallow crustal discontinuities and graben formation
Philip A. Davis, Kenneth L. Tanaka, Matthew P. Golombek
1995, Icarus (114) 403-422
Using Viking Orbiter images, detailed photoclinometric profiles were obtained across 10 irregular depressions, 32 fretted fractures, 49 troughs and pits, 124 solitary scarps, and 370 simple grabens in the north Tharsis region of Mars. These data allow inferences to be made on the shallow crustal structure of this region. The...
Overview of the influence of syn-sedimentary tectonics and palaeo-fluvial systems on coal seam and sand body characteristics in the Westphalian C strata, Campine Basin, Belgium
Roland Dreesen, Dominique Bossiroy, Michiel Dusar, R. M. Flores, Paul Verkaeren
M. K. G. Whateley, D.A. Spears, editor(s)
1995, Book chapter, European coal geology
The Westphalian C strata found in the northeastern part of the former Belgian coal district (Campine Basin), which is part of an extensive northwest European paralic coal basin, are considered. The thickness and lateral continuity of the Westphalian C coal seams vary considerably stratigraphically and areally. Sedimentological facies analysis of...
Estimation of rod scale errors in geodetic leveling
Michael R. Craymer, Petr Vaníček, Robert O. Castle
1995, Journal of Geophysical Research B: Solid Earth (100) 15129-15145
Comparisons among repeated geodetic levelings have often been used for detecting and estimating residual rod scale errors in leveled heights. Individual rod-pair scale errors are estimated by a two-step procedure using a model based on either differences in heights, differences in section height differences, or differences in section tilts. It...
Outwash plains and thermokarst on Mars
F.M. Costard, J.S. Kargel
1995, Icarus (114) 93-112
The spatial distribution of different types of rampart craters on Mars suggests a hemispheric asymmetry in the distribution of ground ice. The northern plains, especially major topographic depressions near the terminations of outflow channels, have high percentages of rampart craters. Two of these basins, Acidalia and Utopia Planitiae, received extraordinarily...
Plutonism at the interior margin of the Jurassic magmatic arc, Mojave Desert, California
Miquette E. Gerber, Calvin F. Miller, Joseph L. Wooden
David M. Miller, Cathy Busby, editor(s)
1995, Book chapter, Jurassic magmatism and tectonics of the North American cordillera
The inland edge of the Jurassic magmatic belt passes through the eastern Mojave Desert, where it was emplaced in ancient continental crust. Three intrusive units exposed there—the Ship and Clipper Mountains plutons and a dike swarm in the Old Woman and Piute Mountains and Kilbeck Hills—are broadly similar to each...
Decline of northern pintails
Jay B. Hestback
Edward T. LaRoe, Gaye S. Farris, Catherine E. Puckett, Peter D. Doran, Michael J. Mac, editor(s)
1995, Book chapter, Our living resources: A report to the nation on the distribution, abundance, and health of U.S. plants, animals, and ecosystems
The size of the continental breeding population of northern pintail (Anas acuta) has greatly varied since 1955, with numbers in surveyed areas ranging from a high of 9.9 million to a low of 1.8 million in 1991. This variation results primarily from differences in the numbers of breeding pintails in...
Declining growth of Mauna Loa during the last 100,000 years: Rates of lava accumulation vs. gravitational subsidence
Peter W. Lipman
J.M. Rhodes, J. P. Lockwood, editor(s)
1995, Book chapter, Mauna Loa revealed: Structure, composition, history, and hazards
No abstract available....
Paleoecology of the Springfield Coal Member (Desmoinesian, Illinois Basin) near the Leslie Cemetery paleochannel, southwestern Indiana
Debra A. Willard, William A. DiMichele, Donald L. Eggert, James C. Hower, Carl B. Rexroad, Andrew C. Scott
1995, International Journal of Coal Geology (27) 59-98
The Springfield Coal Member (Carbondale Group, Petersburg Formation of Indiana) is split locally in Warrick and Gibson Counties, Indiana, by clastic rocks of the Folsomville Member (Carbondale Group, Petersburg Formation) that represent the Leslie Cemetery paleochannel, part of a large, interconnected paleochannel system...
Velocities and mass balance of Pine Island Glacier, West Antarctica, derived from ERS-1 SAR images
Baerbel K. Lucchitta, Christina E. Rosanova, K.F. Mullins
1995, Annals of Glaciology (21) 277-283
Pine Island Glacier is one of the major ice streams draining West Antarctica. We calculated average velocities for both its grounded and floating parts by tracking crevasses and other patterns moving with the ice on two sequential images acquired in February and December 1992 by ERS-1 SAR (European Remote-Sensing Satellite,...
