Distribution of oxygen-18 and deuteriun in river waters across the United States
Carol Kendall, Tyler B. Coplen
2001, Hydrological Processes (15) 1363-1393
Reconstruction of continental palaeoclimate and palaeohydrology is currently hampered by limited information about isotopic patterns in the modern hydrologic cycle. To remedy this situation and to provide baseline data for other isotope hydrology studies, more than 4800, depth- and width-integrated, stream samples from 391 selected sites within the USGS...
Simulating the impact of human land use change on forest composition in the Great Plains agroecosystems with the Seedscape model
W.E. Easterling, J.R. Brandle, C.J. Hays, Q. Guo, D.S. Guertin
2001, Ecological Modelling (104) 163-176
The expansion and contraction of marginal cropland in the Great Plains often involves small forested strips of land that provide important ecological benefits. The effect of human disturbance on these forests is not well known. Because of their unique structure such forests are not well-represented by forest gap models. In...
Triggered earthquakes and the 1811-1812 New Madrid, central United States, earthquake sequence
S. E. Hough
2001, Bulletin of the Seismological Society of America (91) 1574-1581
The 1811-1812 New Madrid, central United States, earthquake sequence included at least three events with magnitudes estimated at well above M 7.0. I discuss evidence that the sequence also produced at least three substantial triggered events well outside the New Madrid Seismic Zone, most likely in the vicinity of Cincinnati,...
A field and statistical modeling study to estimate irrigation water use at Benchmark Farms study sites in southwestern Georgia, 1995-96
Julia L. Fanning, Gregory E. Schwarz, William C. Lewis
2001, Water-Resources Investigations Report 2000-4292
A benchmark irrigation monitoring network of farms located in a 32-county area in southwestern Georgia was established in 1995 to improve estimates of irrigation water use. A stratified random sample of 500 permitted irrigators was selected from a data base--maintained by the Georgia Department of Natural Resources, Georgia Environmental Protection...
Water-quality trends for a stream draining the Southern Anthracite Field, Pennsylvania
C.A. Cravotta III, Michael D. Bilger
2001, Geochemistry: Exploration, Environment, Analysis (1) 33-50
Stream flow, chemical and biological data for the northern part of Swatara Creek, which drains a 112 km2 area in the Southern Anthracite Field of eastern Pennsylvania, indicate progressive improvement in water quality since 1959, after which most mines in the watershed had been flooded. Drainage from the flooded mines contributes substantially...
The geology of a part of Acadia and the nature of the Acadian orogeny across Central and Eastern Maine
R. D. Tucker, P. H. Osberg, H. N. Berry IV
2001, American Journal of Science (301) 205-260
The zone of Acadian collision between the Medial New England and Composite Avalon terranes is well preserved in Maine. A transect from northwest (Rome) to southeast (Camden) crosses the eastern part of Medial New England comprising the Central Maine basin, Liberty-Orrington thrust sheet, and Fredericton trough, and the western...
The Gibbs free energy of nukundamite (Cu3.38Fe0.62S4): A correction and implications for phase equilibria
Robert R. Seal, II, E. E. Inan, Bruce S. Hemingway
2001, Canadian Mineralogist (39) 1635-1640
The Gibbs free energy of formation of nukundamite (Cu3.38Fe0.62S4) was calculated from published experimental studies of the reaction 3.25 Cu3.38Fe0.62S4 + S2 = 11 CuS + 2 FeS2 in order to correct an erroneous expression in the published record. The correct expression describing the Gibbs free energy of formation (kJ·mol−1) of nukundamite relative...
Watershed scaling effect on base flow nitrate, valley and ridge physiographic province
B.D. Lindsey, W.J. Gburek, G.J. Folmar
2001, Journal of the American Water Resources Association (37) 1103-1117
A study of stream base flow and NO3-N concentration was conducted simultaneously in 51 subwatersheds within the 116-square-kilometer watershed of East Mahantango Creek near Klingerstown, Pennsylvania. The study was designed to test whether measurable results of processes and observations within the smaller watersheds were similar to or transferable to a...
Apatite fission-track evidence of widespread Eocene heating and exhumation in the Yukon-Tanana Upland, interior Alaska
Cynthia Dusel-Bacon, J.M. Murphy
2001, Canadian Journal of Earth Sciences (38) 1191-1204
We present an apatite fission-track (AFT) study of five plutonic rocks and seven metamorphic rocks across 310 km of the YukonTanana Upland in east-central Alaska. Samples yielding ~40 Ma AFT ages and mean confined track lengths > 14 µm with low standard...
Diet composition and fish consumption of double-crested cormorants from the Little Galloo Island colony of eastern lake Ontario in 2000
J. H. Johnson, R. M. Ross, R.D. McCullough, B. Edmonds
2001, Report, New York State Department of Environmental Conservation 2000 Annual Report; NYSDEC Lake Ontario Annual Report 2000
No abstract available at this time...
Fall migration routes, timing, and wintering sites of North American ospreys as determined by satellite telemetry
M.S. Martell, Charles J. Henny, P. Nye, Matthew J. Solensky
2001, The Condor (103) 715-724
Satellite telemetry was used to determine fall migratory movements of Ospreys (Pandion haliaetus) breeding in the United States. Study areas were established along the lower Columbia River between Oregon and Washington; in north-central Minnesota; on Shelter Island, New York; and in southern New Jersey. Seventy-four adults (25 males, 49 females)...
Crustal deformation rates in Central and Eastern U.S. inferred from GPS
Weijun Gan, W.H. Prescott
2001, Geophysical Research Letters (28) 3733-3736
Analysis of continuous GPS observations between 1996 and 2000 at 62 stations distributed throughout the central and eastern United States suggests that the area is generally stable. Seven of the 62 stations show anomalous velocities, but there is reason to suspect their monument stability. Assuming the remaining 55 stations are...
Strain accumulation and rotation in the Eastern California Shear Zone
J.C. Savage, Weijun Gan, J. L. Svarc
2001, Journal of Geophysical Research B: Solid Earth (106) 21995-22007
Although the Eastern California Shear Zone (ECSZ) (strike ∼N25°W) does not quite coincide with a small circle drawn about the Pacific-North America pole of rotation, trilateration and GPS measurements demonstrate that the motion within the zone corresponds to right-lateral simple shear across a vertical plane (strike N33°W±5°) roughly parallel to...
Detection of Perkinsus marinus extracellular proteins tissues of the eastern oyster Crassostrea virginica: Potential use diagnostic assays
C. A. Ottinger, T.D. Lewis, D.A. Shapiro, M. Faisal, S.L. Kaattari
2001, Journal of Aquatic Animal Health (13) 133-141
Perkinsus marinus, the cause of serious losses of the eastern oyster Crassostrea virginica, secretes extracellular proteins (ECP) in culture (in vitro) including serine proteases. The production of similar ECP in the eastern oyster (in vivo) and their role in pathogenicity, however, remain to be elucidated. The induction and dissemination of these...
Ploidy race distributions since the Last Glacial Maximum in the North American desert shrub, Larrea tridentata
Kimberly L. Hunter, Julio L. Betancourt, Brett R. Riddle, Thomas R. Van Devender, K.L. Cole, W. G. Spaulding
2001, Global Ecology and Biogeography (10) 521-533
A classic biogeographic pattern is the alignment of diploid, tetraploid and hexaploid races of creosote bush (Larrea tridentata) across the Chihuahuan, Sonoran and Mohave Deserts of western North America. We used statistically robust differences in guard cell size of modern plants and fossil leaves from packrat middens to...
Olivine-liquid relations of lava erupted by Kilauea volcano from 1994 to 1998: Implications for shallow magmatic processes associated with the ongoing east-rift-zone eruption
Carl R. Thornber
2001, Canadian Mineralogist (39) 239-266
From 1994 through 1998, the eruption of Kîlauea, in Hawai’i, was dominated by steady-state effusion at Pu‘u ‘Ô‘ô that was briefly disrupted by an eruption 4 km uprift at Nāpau Crater on January 30, 1997. In this paper, I describe the systematic relations of whole-rock, glass, olivine, and olivine-inclusion compositions...
Diagnostic histological findings in Yosemite toads (Bufo canorus) from die-off in the 1970s
D. Earl Green, Cynthia Kagarise Sherman
2001, Journal of Herpetology (35) 92-103
Twelve adult and 25 larval Yosemite toad (Bufo canorus) specimens from the eastern Sierra Nevada of California were examined histologically for evidence of infectious, toxicological, and degenerative diseases. The preserved toads were selected from 21 that had been salvaged or collected during a die-off in 1976-1979 that immediately preceded a...
Observation of the geology and geomorphology of the 1999 Marsokhod test site
R. A. De Hon, N.G. Barlow, M. K. Reagan, E. Arthur Bettis III, C.T. Foster Jr., V. C. Gulick, L.S. Crumpler, J.C. Aubele, M. G. Chapman, K. L. Tanaka
2001, Journal of Geophysical Research E: Planets (106) 7665-7682
The Marsokhod rover returned data from six stations that were used to decipher the geomorphology and geology of a region not previously visited by members of the geomorphology field team. Satellite images and simulated descent images provided information about the regional setting. The landing zone was on an alluvial apron...
Serologic survey for canine coronavirus in wolves from Alaska
Randall L. Zarnke, Jim F. Evermann, Jay M. Ver Hoef, Mark E. McNay, Rodney D. Boertje, Craig L. Gardner, Layne G. Adams, Bruce W. Dale, John W. Burch
2001, Journal of Wildlife Diseases (37) 740-745
Wolves (Canis lupus) were captured in three areas of Interior Alaska (USA). Four hundred twenty-five sera were tested for evidence of exposure to canine coronavirus by means of an indirect fluorescent antibody procedure. Serum antibody prevalence averaged 70% (167/240) during the spring collection period and 25% (46/185) during the autumn...
Upper crustal structure in Puget Lowland, Washington: Results from the 1998 Seismic Hazards Investigation in Puget Sound
T.M. Brocher, T. Parsons, R.J. Blakely, N.I. Christensen, M. A. Fisher, R.E. Wells, Uri S. ten Brink, T. L. Pratt, R. S. Crosson, K. C. Creager, N. P. Symons, L.A. Preston, T. Van Wagoner, K.C. Miller, C.M. Snelson, A.M. Trehu, V.E. Langenheim, G.D. Spence, K. Ramachandran, R.A. Hyndman, D. C. Mosher, B.C. Zelt, C.S. Weaver
2001, Journal of Geophysical Research B: Solid Earth (106) 13541-13564
A new three-dimensional (3-D) model shows seismic velocities beneath the Puget Lowland to a depth of 11 km. The model is based on a tomographic inversion of nearly one million first-arrival travel times recorded during the 1998 Seismic Hazards Investigation in Puget Sound (SHIPS), allowing higher-resolution mapping of subsurface structures...
Spatial extent of a hydrothermal system at Kilauea Volcano, Hawaii, determined from array analyses of shallow long-period seismicity 2. Results
J. Almendros, B. Chouet, P. Dawson
2001, Journal of Geophysical Research B: Solid Earth (106) 13581-13597
Array data from a seismic experiment carried out at Kilauea Volcano, Hawaii, in February 1997, are analyzed by the frequency-slowness method. The slowness vectors are determined at each of three small-aperture seismic antennas for the first arrivals of 1129 long-period (LP) events and 147 samples of volcanic tremor. The source...
Historical effects of El Nino and La Nina events on the seasonal evolution of the montane snowpack in the Columbia and Colorado River Basins
Martyn P. Clark, Mark C. Serreze, Gregory J. McCabe
2001, Water Resources Research (37) 741-757
Snow‐water equivalent (SWE) data measured at several hundred montane sites in the western United States are used to examine the historic effects of El Nino and La Nina events on seasonal snowpack evolution in the major subbasins in the Columbia and Colorado River systems. Results are used to predict annual...
Holocene vegetation history from fossil rodent middens near Arequipa, Peru
C.A. Holmgren, J.L. Betancourt, K.A. Rylander, J. Roque, O. Tovar, H. Zeballos, E. Linares, Jay Quade
2001, Quaternary Research (56) 242-251
Rodent (Abrocoma, Lagidium, Phyllotis) middens collected from 2350 to 2750 m elevation near Arequipa, Peru (16??S), provide an ???9600-yr vegetation history of the northern Atacama Desert, based on identification of >50 species of plant macrofossils. These midden floras show considerable stability throughout the Holocene, with slightly more mesophytic plant assemblages...
A geostatistical approach to predicting sulfur content in the Pittsburgh coal bed
W.D. Watson, L.F. Ruppert, L. J. Bragg, S.J. Tewalt
2001, International Journal of Coal Geology (48) 1-22
The US Geological Survey (USGS) is completing a national assessment of coal resources in the five top coal-producing regions in the US. Point-located data provide measurements on coal thickness and sulfur content. The sample data and their geologic interpretation represent the most regionally complete and up-to-date assessment of what is...
Impact of climate and parent material on chemical weathering in Loess-derived soils of the Mississippi River valley
D.R. Muhs, E. Arthur Bettis III, J. Been, J. P. McGeehin
2001, Soil Science Society of America Journal (65) 1761-1777
Peoria Loess-derived soils on uplands east of the Mississippi River valley were studied from Louisiana to Iowa, along a south-to-north gradient of decreasing precipitation and temperature. Major element analyses of deep loess in Mississippi and Illinois show that the composition of the parent material is similar in the northern and...
