Deformation across the forearc of the Cascadia subduction zone at Cape Blanco, Oregon
J.C. Savage, J. L. Svarc, W.H. Prescott, M.H. Murray
2000, Journal of Geophysical Research B: Solid Earth (105) 3095-3102
Over the interval 1992-1999 the U.S. Geological Survey measured the deformation of a geodetic array extending N880°E (approximate direction of plate convergence) from Cape Blanco on the Oregon coast to the volcanic arc near Newberry Crater (55 and 350 km, respectively, from the deformation front). Within about 150 km from...
Origin of Amazon mudbanks along the northeastern coast of South America
M. A. Allison, M.T. Lee, A.S. Ogston, R.C. Aller
2000, Marine Geology (163) 241-256
Seismic profiles, sediment cores, and water column measurements were collected along the northeastern coast of Brazil to examine the origin of mudbanks in the Amazon coastal mud belt. These 10-60-km-long, shore-attached features previously had been observed to migrate along the 1200 km coast of the Guianas in response to wave...
Downed wood in Micronesian mangrove forests
J. A. Allen, K. C. Ewel, B. D. Keeland, T. Tara, T. J. Smith III
2000, Wetlands (20) 169-176
Dead, downed wood is an important component of upland forest and aquatic ecosystems, but its role in wetland ecosystems, including mangroves, is poorly understood. We measured downed wood in ten sites on the western Pacific islands of Kosrae, Pohnpei, and Yap, all located within the Federated States of Micronesia. Our...
Sequence stratigraphy of the Aux Vases Sandstone: A major oil producer in the Illinois basin
H.E. Leetaru
2000, American Association of Petroleum Geologists Bulletin (84) 399-422
The Aux Vases Sandstone (Mississippian) has contributed between 10 and 25% of all the oil produced in Illinois. The Aux Vases is not only an important oil reservoir but is also an important source of groundwater, quarrying stone, and fluorspar. Using sequence stratigraphy, a more accurate stratigraphic interpretation of this...
Sorption of selected organic compounds from water to a peat soil and its humic-acid and humin fractions: Potential sources of the sorption nonlinearity
C. T. Chiou, D. E. Kile, D.W. Rutherford, G. Sheng, S.A. Boyd
2000, Environmental Science & Technology (34) 1254-1258
The sorption isotherms of ethylene dibromide (EDB), diuron (DUN), and 3,5-dichlorophenol (DCP) from water on the humic acid and humin fractions of a peat soil and on the humic-acid of a muck soil have been measured. The data were compared with those of the solutes with the whole peat from...
An in vivo model fish system to test chemical effects on sexual differentiation and development: exposure to ethinyl estradiol
Diana M. Papoulias, Douglas B. Noltie, Donald E. Tillitt
2000, Aquatic Toxicology (48) 37-50
A model system was characterized which may be used as an in vivo screen for effects of chemicals or environmental mixtures on sexual differentiation and development of reproductive organs and gametes. We evaluated the effects of a model environmental estrogen, ethinyl estradiol (EE2), on the d-rR strain of medaka, Oryzias...
Swimming performance of larval robust redhorse Moxostoma robustum and low-velocity habitat modeling in the Oconee River, Georgia
Carl R. Ruetz III, Cecil A. Jennings
2000, Transactions of the American Fisheries Society (129) 398-407
The robust redhorse Moxostoma robustum occurs in an 85-km stretch of the Oconee River, Georgia, downstream of a hydropower dam. The population consists primarily of older individuals and recruitment in recent years has been minimal. Operation of the hydropower dam may have affected recruitment negatively by displacing newly hatched larvae...
Trapping and migration of methane associated with the gas hydrate stability zone at the Blake Ridge Diapir: New insights from seismic data
M.H. Taylor, William P. Dillon, I.A. Pecher
2000, Conference Paper, Marine Geology
The Blake Ridge Diapir is the southernmost of a line of salt diapirs along the Carolina trough. Diapirs cause faulting of the superjacent sediments, creating pathways for migration of fluids and gas to the seafloor. We analyzed reflection seismic data from the Blake Ridge Diapir, which is located in a...
Mode of occurrence of arsenic in four US coals
A. Kolker, Frank E. Huggins, C.A. Palmer, N. Shah, S.S. Crowley, G.P. Huffman, R. B. Finkelman
2000, Fuel Processing Technology (63) 167-178
An integrated analytical approach has been used to determine the mode of occurrence of arsenic in samples of four widely used US coals: the Pittsburgh, Illinois #6, Elkhorn/Hazard, and Wyodak. Results from selective leaching, X-ray absorption fine structure (XAFS) spectroscopy, and electron microprobe analysis show that pyrite is the principal...
Timing of the Acadian Orogeny in northern New Hampshire
J.D. Eusden Jr., C.A. Guzofski, A.C. Robinson, R. D. Tucker
2000, Journal of Geology (108) 219-232
New U-Pb geochronology constrains the timing of the Acadian orogeny in the Central Maine Terrane of northern New Hampshire. Sixteen fractions of one to six grains each of zircon or monazite have been analyzed from six samples: (1) an early syntectonic diorite that records the onset of the Acadian, (2)...
Nutrients in groundwaters of the conterminous United States, 1992-1995
B. T. Nolan, J.D. Stoner
2000, Environmental Science & Technology (34) 1156-1165
Results of a national water quality assessment indicate that nitrate is detected in 71% of groundwater samples, more than 13 times as often as ammonia, nitrite, organic nitrogen, and orthophosphate, based on a common detection threshold of 0.2 mg/L. Shallow groundwater (typically 5 m deep or less) beneath agricultural land...
Distribution and relative abundance of the crayfishes Procambarus alleni (Faxon) and P. fallax (Hagen) in southern Florida
A.N. Hendrix, W.F. Loftus
2000, Wetlands (20) 194-199
The Everglades crayfish (Procambarus alleni Faxon) is the only species reported from Everglades National Park (ENP) and Big Cypress National Preserve (BICY). However, we identified a second species, Procambarus fallax (Hagen), from those locations. Reexamination of archived samples showed that P. fallax had been collected as early as 1985 but...
Effect of temperature on photosynthesis-light response and growth of four phytoplankton species isolated from a tidal freshwater river
J.F. Coles, R.C. Jones
2000, Journal of Phycology (36) 7-16
Three cyanobacteria (Microcystis aeruginosa Kutz. emend. Elenkin, Merismopedia tenuissima Lemmermann, and Oscillatoria sp.) and one diatom (Aulacoseira granulata var. angustissima O. Mull. emend. Simonsen) were isolated from the tidal freshwater Potomac River and maintained at 23??C and 40 ??mol photons??m-2??s-1 on a 16:8 L:D cycle in unialgal culture. Photosynthetic parameters...
Trace elements, organochlorines, polycyclic aromatic hydrocarbons, dioxins, and furans in lesser scaup wintering on the Indiana Harbor Canal
T. W. Custer, Christine M. Custer, R. K. Hines, D. W. Sparks
2000, Environmental Pollution (110) 469-482
During the winter of 1993a??94, male lesser scaup (Aythya affinis) were collected on the heavily polluted Indiana Harbor Canal (IHC), East Chicago, IN, USA, and examined for tissue contaminant levels. Lesser scaup collected on the IHC had higher concentrations of cadmium (Cd), mercury (Hg), selenium (Se), polychlorinated biphenyls (PCBs), selected...
The 1997 Spring Regression of the Martian South Polar Cap: Mars Orbiter Camera Observations
P.B. James, B.A. Cantor, M. C. Malin, K. Edgett, M. H. Carr, G. E. Danielson, A.P. Ingersoll, M. E. Davies, W.K. Hartmann, A. S. McEwen, L.A. Soderblom, P.C. Thomas, J. Veverka
2000, Icarus (144) 410-418
The Mars Orbiter cameras (MOC) on Mars Global Surveyor observed the south polar cap of Mars during its spring recession in 1997. The images acquired by the wide angle cameras reveal a pattern of recession that is qualitatively similar to that observed by Viking in 1977 but that does differ...
Volcanic lake systematics II. Chemical constraints
J.C. Varekamp, G.B. Pasternack, G.L. Rowe Jr.
2000, Book, Journal of Volcanology and Geothermal Research
A database of 373 lake water analyses from the published literature was compiled and used to explore the geochemical systematics of volcanic lakes. Binary correlations and principal component analysis indicate strong internal coherence among most chemical parameters. Compositional variations are influenced by the flux of magmatic volatiles and/or deep hydrothermal...
Seasonal movements and pelagic habitat use of Murres and Puffins determined by satellite telemetry
Scott A. Hatch, P.M. Meyers, D.M. Mulcahy, David C. Douglas
2000, Condor (102) 145-154
We tracked the movements of Common Murres (Uria aalge), Thick-billed Murres (U. lomvia), and Tufted Puffins (Fratercula cirrhata) using surgically implanted satellite transmitters. From 1994–1996, we tagged 53 birds from two colonies in the Gulf of Alaska (Middleton Island and Barren Islands) and two colonies in the Chukchi Sea (Cape...
Invasion by a Japanese marine microorganism in western North America
M. McGann, D. Sloan, A.N. Cohen
2000, Hydrobiologia (421) 25-30
The earliest record in western North America of Trochammina hadai Uchio, a benthic foraminifer common in Japanese estuaries, is from sediment collected in Puget Sound in 1971. It was first found in San Francisco Bay in sediment samples taken in 1983, and since 1986 has been collected at 91% of...
Active, capable, and potentially active faults - a paleoseismic perspective
M. N. Machette
2000, Journal of Geodynamics (29) 387-392
Maps of faults (geologically defined source zones) may portray seismic hazards in a wide range of completeness depending on which types of faults are shown. Three fault terms - active, capable, and potential - are used in a variety of ways for different reasons or applications. Nevertheless, to be useful...
Geoelectrical structure of the central zone of Piton de la Fournaise volcano (Reunion)
J.-F. Lenat, D. Fitterman, D. B. Jackson, P. Labazuy
2000, Bulletin of Volcanology (62) 75-89
A study of the geoelectrical structure of the central part of Piton de la Fournaise volcano (Reunion, Indian Ocean) was made using direct current electrical (DC) and transient electromagnetic soundings (TEM). Piton de la Fournaise is a highly active oceanic basaltic shield and has been active for more than half...
Variability of Mars' North Polar water ice cap: I. Analysis of Mariner 9 and Viking Orbiter imaging data
Deborah S. Bass, Kenneth E. Herkenhoff, David A. Paige
2000, Icarus (144) 382-396
Previous studies interpreted differences in ice coverage between Mariner 9 and Viking Orbiter observations of Mars' north residual polar cap as evidence of interannual variability of ice deposition on the cap. However, these investigators did not consider the possibility that there could be significant changes in the ice coverage within...
Hydrogen defects in α-Al2O3 and water weakening of sapphire and alumina ceramics between 600 and 1000°C: I. Infrared characterization of defects
A. K. Kronenberg, J. Castaing, T. E. Mitchell, S. H. Kirby
2000, Acta Materialia (48) 1481-1494
Hydrogen impurities in materials influence their properties, including flow strength. α-Al2O3 single crystals and polycrystalline ceramics were annealed in supercritical water between 850 and 1025°C, under pressures in the range 1500–2000 MPa. A few specimens were further subjected to plastic deformation. Hydrogen penetration was examined using infrared absorption measurements of O–H...
Estimation of hydrocarbon biodegradation rates in gasoline-contaminated sediment from measured respiration rates
R.J. Baker, A. L. Baehr, M.A. Lahvis
2000, Journal of Contaminant Hydrology (41) 175-192
An open microcosm method for quantifying microbial respiration and estimating biodegradation rates of hydrocarbons in gasoline-contaminated sediment samples has been developed and validated. Stainless-steel bioreactors are filled with soil or sediment samples, and the vapor-phase composition (concentrations of oxygen (O2), nitrogen (N2), carbon dioxide (CO2), and selected hydrocarbons) is monitored...
Effects of temperature on the elimination of benzocaine and acetylated benzocaine residues from the edible fillet of rainbow trout (Oncorhynchus mykiss)
G. R. Stehly, J.R. Meinertz, W.H. Gingerich
2000, Food Additives and Contaminants (17) 387-392
The effect of temperature (7 degrees C and 16 degrees C) on the extent of accumulation and the elimination of benzocaine (BNZ) and its metabolite, acetylated benzocaine (AcBNZ), in the fillet tissue of rainbow trout was investigated Residues were measured after bath exposure to an anesthetizing concentration of benzocaine (30...
Superfund GIS - 1:250,000 Geology of Tennessee
D.C. Greene, W.J. Wolfe
2000, Report
This data set is a digital representation of the printed 1:250,000 geologic maps from the Tennessee Department of Environment and Conservation, Division of Geology. The coverage was designed primarily to provide a more detailed geologic base than the 1:2,500,000 King and Beikman (1974). 1:24,000 scale coverage of the state...
