Nest materials as a source of genetic data for avian ecological studies
John M. Pearce, R.L. Fields, Kim T. Scribner
1997, Journal of Field Ornithology (68) 471-481
We examined the utility of feathers and egg shell membranes, deposited in the nests of Spectacled Eiders (Somateria fischeri), as a source of DNA for genetic studies at both the population and individual level. The potential for feather DNA contamination as a result of female behavioral interactions (e.g. nest parasitism),...
Sulphur and oxygen sequestration of n-C37 and n-C38 unsaturated ketones in an immature kerogen and the release of their carbon skeletons during early stages of thermal maturation
M.P. Koopmans, C. Schaeffer-Reiss, J. W. De Leeuw, M. D. Lewan, J.R. Maxwell, P. Schaeffer, Damste J.S. Sinninghe
1997, Geochimica et Cosmochimica Acta (61) 2397-2408
Sedimentary rock from the Gessoso-solfifera Formation (Messinian) in the Vena del Gesso Basin (northern Italy) containing immature (Ro = 0.25%) S-rich organic matter was artificially matured by hydrous pyrolysis at temperatures from 160 to 330°C for 72 h to study the diagenetic fate of n-C37 and n-C38 di- and tri-unsaturated methyl and ethyl ketones (alkenones)...
An interactive program for computer-aided map design, display, and query: EMAPKGS2
G.W. Pouch
1997, Computers & Geosciences (23) 259-266
EMAPKGS2 is a user-friendly, PC-based electronic mapping tool for use in hydrogeologic exploration and appraisal. EMAPKGS2 allows the analyst to construct maps interactively from data stored in a relational database, perform point-oriented spatial queries such as locating all wells within a specified radius, perform geographic overlays, and export the data...
Observations of tidal flux between a submersed aquatic plant stand and the adjacent channel in the Potomac River near Washington, D.C.
N. B. Rybicki, H. L. Jenter, V. Carter, R.A. Baltzer, M. Turtora
1997, Limnology and Oceanography (42) 307-317
Dye injection studies and direct velocity and water-level measurements were made in macrophyte stands and adjacent channels in order to observe the effects of the macrophyte stand on flow and mass exchange in the tidal Potomac River. During the summer, dense stands of submersed aquatic plants cover most shoals <2...
Response of Olive View Hospital to Northridge and Whittier earthquakes
M. Çelebi
1997, Journal of Structural Engineering (123) 389-396
The purpose of this paper is to study the response of the conventionally designed new Olive View Medical Center (OVMC) building at 16 km from the epicenter of the January 17, 1994 Northridge, California earthquake (Ms= 6.8). OVMC is on an alluvial deposit. The building was subjected to design level...
Late Cenozoic history and slip rates of the Fish Lake Valley, Emigrant Peak, and Deep Springs fault zones, Nevada and California
M.C. Reheis, T. L. Sawyer
1997, Geological Society of America Bulletin (109) 280-299
Several well-dated stratigraphic markers permit detailed assessment of the temporal and spatial variation in slip rates along the interconnected faults of the Fish Lake Valley, Emigrant Peak, and Deep Springs fault zones in west-central Nevada and east-central California. Right-lateral motion on the Fish Lake Valley fault zone apparently began ca....
Habitat associations and effects of urbanization on macroinvertebrates of a small, high-plains stream
A.G. Elliott, W.A. Hubert, S.H. Anderson
1997, Journal of Freshwater Ecology (12) 61-73
We described the relations between abundance of macroinvertebrates and several habitat variables in Crow Creek within F.E. Warren Air Force Base, Laramie County, Wyoming. Water velocity and longitudinal location showed the highest numbers of significant correlations with abundance of macroinvertebrate taxa. Changes in the macroinvertebrate community with changes...
Changes in driftwood delivery to the Canadian Arctic Archipelago: The hypothesis of postglacial oscillations of the transpolar drift
A. S. Dyke, J. England, Erk Reimnitz, H. Jette
1997, Arctic (50) 1-16
Driftwood appears to be absent in the Beaufort Gyre but abundant in parts of the Transpolar Drift (TPD), which crosses the Arctic Ocean from the Chukchi Sea to the vicinity of northeastern Greenland. Nearly 300 radiocarbon dates on Holocene driftwood from the Canadian Arctic Archipelago reveal two regions with contrasting...
Thermal regime of the San Andreas fault near Parkfield, California
J.H. Sass, C.F. Williams, A.H. Lachenbruch, S.P. Galanis Jr., F.V. Grubb
1997, Journal of Geophysical Research B: Solid Earth (102) 27575-27585
Knowledge of the temperature variation with depth near the San Andreas fault is vital to understanding the physical processes that occur within the fault zone during earthquakes and creep events. Parkfield is near the southern end of the Coast Ranges segment of the San Andreas fault. This segment has higher...
Creep of water ices at planetary conditions: A compilation
W.B. Durham, S. H. Kirby, L.A. Stern
1997, Journal of Geophysical Research E: Planets (102) 16293-16302
Many constitutive laws for the flow of ice have been published since the advent of the Voyager explorations of the outer solar system. Conflicting data have occasionally come from different laboratories, and refinement of experimental techniques has led to the publication of laws that supersede earlier ones. In addition, there...
Nowcast model for hazardous material spill prevention and response, San Francisco Bay, California
Ralph T. Cheng, Wayne L. Wilmot, Jerry A. Galt
1997, Conference Paper, Oceans Conference Record (IEEE)
The National Oceanic and Atmospheric Administration (NOAA) installed the Physical Oceanographic Real-time System (PORTS) in San Francisco Bay, California, to provide real-time observations of tides, tidal currents, and meteorological conditions to, among other purposes, guide hazardous material spill prevention and response. Integrated with nowcast modeling techniques and dissemination of real-time...
Variable deep structure of a midcontinent fault and fold zone from seismic reflection: La Salle deformation belt, Illinois basin
J.H. McBride
1997, Geological Society of America Bulletin (109) 1502-1513
Deformation within the United States midcontinent is frequently expressed as quasilinear zones of faulting and folding, such as the La Salle deformation belt, a northwest-trending series of folds cutting through the center of the Illinois basin. Seismic reflection profiles over the southern La...
Results of borehole geophysical logging and aquifer-isolation tests conducted in the John Wagner and Sons, Inc. former production well, Ivyland, Pennsylvania
Ronald A. Sloto
1997, Water-Resources Investigations Report 97-4095
A suite of borehole geophysical logs and heat-pulse-flowmeter measurements run in the former production well at the John Wagner and Sons, Inc. plant indicate two zones of borehole flow. In the upper part of the well, water enters the borehole through a fracture at 90 ft (feet) below floor level,...
The effect of grain size and surface area on organic matter, lignin and carbohydrate concentration, and molecular compositions in Peru Margin sediments
B.A. Bergamaschi, E. Tsamakis, R.G. Keil, T.I. Eglinton, D.B. Montlucon, J. I. Hedges
1997, Geochimica et Cosmochimica Acta (61) 1247-1260
A C-rich sediment sample from the Peru Margin was sorted into nine hydrodynamically-determined grain size fractions to explore the effect of grain size distribution and sediment surface area on organic matter content and composition. The neutral monomeric carbohydrate composition, lignin oxidation product yields, total organic carbon, and total nitrogen contents...
Circum-Arctic map of permafrost and ground-ice conditions
J. Brown, O. J. Ferrians Jr., J. A. Heginbottom, E. S. Melnikov
1997, Circum-Pacific Map 45
No abstract available....
Chemical weathering of a soil chronosequence on granitoid alluvium: II. Mineralogic and isotopic constraints on the behavior of strontium
T. Bullen, A. White, A. Blum, J. Harden, M. Schulz
1997, Geochimica et Cosmochimica Acta (61) 291-306
The use of strontium isotopes to evaluate mineral weathering and identify sources of base cations in catchment waters requires an understanding of the behavior of Sr in the soil environment as a function of time. Our approach is to model the temporal evolution of 87Sr/86Sr of the cation exchange pool in...
The highest global concentrations and increased abundance of oceanic plastic debris in the North Pacific: Evidence from seabirds
Martin D. Robards, Patrick J. Gould
James M. Coe, Donald B. Rogers, editor(s)
1997, Book chapter, Marine debris: Sources, impacts, and solutions
Plastic pollution has risen dramatically with an increase in production of plastic resin during the past few decades. Plastic production in the United States increased from 2.9 million tons in I960 to 47.9 million tons in 1985 (Society of the Plastics Industry 1986). This has been paralleled by a significant...
Streptognathodus isolatus new species (Conodonta): Proposed index for the Carboniferous-Permian boundary
V.V. Chernykh, S.M. Ritter, B. R. Wardlaw
1997, Journal of Paleontology (71) 162-164
Davydov et al. (1995) recently proposed the Aidaralash Creek section in northern Kazakhstan (Figures 2 and 3) as the Global Stratotype Section and Point (GSSP) for the base of the Permian System. The proposed boundary is the level in an evolutionary sequence where Streptognathodus wabaunsensis Gunnell gives rise...
Migration by radio-tagged pacific golden-plovers from hawaii to Alaska, and their subsequent survival
O.W. Johnson, N. Warnock, M.A. Bishop, A.J. Bennett, P.M. Johnson, R.J. Kienholz
1997, The Auk (114) 521-524
Many Pacific Golden-Plovers (Pluvialis fulva) and other shorebirds winter in the Hawaiian Islands. This is the first landfall for mid-Pacific migrants after overwater flights of 4,000 km or more from Alaska (Johnson et al. 1989, Johnson and Connors 1996). Previous findings (sightings of marked birds and wing-length measurements) showed Alaska...
Stochastic point-source modeling of ground motions in the Cascadia region
G. M. Atkinson, David M. Boore
1997, Seismological Research Letters (68) 74-85
A stochastic model is used to develop preliminary ground motion relations for the Cascadia region for rock sites. The model parameters are derived from empirical analyses of seismographic data from the Cascadia region. The model is based on a Brune point-source characterized by a stress parameter of 50 bars. The...
Radiation-induced diamond crystallization: Origin of carbonados and its implications on meteorite nano-diamonds
M. Ozima, M. Tatsumoto
1997, Geochimica et Cosmochimica Acta (61) 369-376
Ten carbonados from Central Africa were studied for U-Th-Pb systematics. To extract U, Th, and Pb from the samples, we developed a cold combustion technique wherein diamond was burnt in liquid oxygen. The technique gave low blanks; 25–50 pg for Pb, 3 pg for U, and 5 pg for Th....
Unusual carbon and oxygen isotropic ratios of ostracodal calcite from last interglacial (Sangamon episode) lacustrine sediment in Raymond Basin, Illinois, USA
B. Brandon Curry, T.F. Anderson, K.C. Lohmann
1997, Journal of Paleolimnology (17) 421-435
The stable isotopic records of ostracode valves deposited during the last interglaciation in Raymond Basin, Illinois, have ??13C and ??18O values as high as +16.5??? and +9.2??? respectively, the highest values yet reported from continental ostracodal calcite. Located in south-central Illinois, Raymond, Pittsburgh, Bald Knob, and Hopwood Farm basins collectively...
A comparison of sevoflurane and isoflurane for short-term anesthesia in polecats (Mustela eversmanni)
J. S. Gaynor, J. Wimsatt, C. Mallinckrodt, D. E. Biggins
1997, Journal of Zoo and Wildlife Medicine (28) 274-282
Twenty-four Siberian polecats (Mustela eversmanni) from 12 litters were anesthetized with either inhaled sevoflurane or isoflurane. With 7% delivered sevoflurane and 5% delivered isoflurane, time to loss of righting reflex (mean +/- SE) with sevoflurane (1.9 +/- 0.1 min) was significantly shorter compared with isoflurane (2.6 +/- 0.1 min). During...
Strontium isotopic geochemistry of the Devils Lake drainage system, North Dakota: A preliminary study and potential paleoclimatic implications
R.M. Lent, H.E. Gaudette, W.B. Lyons
1997, Journal of Paleolimnology (17) 147-154
A series of water samples (precipitation, surface water and ground water) from the Devils Lake drainage basin in central North Dakota have been analyzed for their ??180 and ??D and 87Sr/86Sr. The ??180 and ??D of snow and most ground water samples fall near the meteoric water line, with the...
Equations for estimating horizontal response spectra and peak acceleration from western North American earthquakes: A summary of recent work
David M. Boore, William B. Joyner, Thomas E. Fumal
1997, Seismological Research Letters (68) 128-153
No abstract available. ...
