Petrophysics of Lower Silurian sandstones and integration with the tectonic-stratigraphic framework, Appalachian basin, United States
J.W. Castle, A.P. Byrnes
2005, American Association of Petroleum Geologists Bulletin (89) 41-60
Petrophysical properties were determined for six facies in Lower Silurian sandstones of the Appalachian basin: fluvial, estuarine, upper shoreface, lower shoreface, tidal channel, and tidal flat. Fluvial sandstones have the highest permeability for a given porosity and exhibit a wide range of porosity (2-18%) and permeability (0.002-450 md). With a...
Reconnaissance study of late quaternary faulting along Cerro Goden fault zone, western Puerto Rico
P. Mann, C.S. Prentice, J.-C. Hippolyte, N.R. Grindlay, L.J. Abrams, D. Lao-Davila
2005, Special Paper of the Geological Society of America (385) 115-137
The Cerro Goden fault zone is associated with a curvilinear, continuous, and prominent topographic lineament in western Puerto Rico. The fault varies in strike from northwest to west. In its westernmost section, the fault is ∼500 m south of an abrupt, curvilinear mountain front separating the 270- to 361-m-high La...
Eastern rim of the Chesapeake Bay impact crater: Morphology, stratigraphy, and structure
C. W. Poag
2005, Special Paper of the Geological Society of America 117-130
This study reexamines seven reprocessed (increased vertical exaggeration) seismic reflection profiles that cross the eastern rim of the Chesapeake Bay impact crater. The eastern rim is expressed as an arcuate ridge that borders the crater in a fashion typical of the "raised" rim documented in many well preserved complex impact...
Evolution of the magmatic-hydrothermal acid-sulfate system at Summitville, Colorado: Integration of geological, stable-isotope, and fluid-inclusion evidence
P. M. Bethke, R. O. Rye, R.E. Stoffregen, P.G. Vikre
2005, Chemical Geology (215) 281-315
The Summitville Au-Ag-Cu deposit is a classic volcanic dome-hosted high-sulfidation deposit. It occurs in the Quartz Latite of South Mountain, a composite volcanic dome that was emplaced along the coincident margins of the Platoro and Summitville calderas at 22.5??0.5 Ma, penecontemporaneous with alteration and mineralization. A penecontemporaneous quartz monzonite porphyry...
Total mercury concentrations in fillets of bluegill, redear sunfish, largemouth bass, and other fishes from Lake Natoma, Sacramento County, California
M. K. Saiki, B.A. Martin, T.W. May, Charles N. Alpers
2005, California Fish and Game (91) 193-206
This study was conducted during September-October 2002 to verify preliminary findings of elevated total mercury concentrations in skinless fillets of sportfishes inhabiting Lake Natoma. Although we measured total mercury concentrations, most mercury in fish flesh occurs in the methylated form. In August 2000, other investigators collected a small number of...
Evidence for a global seismic-moment release sequence
C. G. Bufe, D. M. Perkins
2005, Bulletin of the Seismological Society of America (95) 833-843
Temporal clustering of the larger earthquakes (foreshock-mainshock-aftershock) followed by relative quiescence (stress shadow) are characteristic of seismic cycles along plate boundaries. A global seismic-moment release history, based on a little more than 100 years of instrumental earthquake data in an extended version of the catalog of Pacheco and Sykes (1992),...
Subduction-zone magnetic anomalies and implications for hydrated forearc mantle
R.J. Blakely, T.M. Brocher, R.E. Wells
2005, Geology (33) 445-448
Continental mantle in subduction zones is hydrated by release of water from the underlying oceanic plate. Magnetite is a significant byproduct of mantle hydration, and forearc mantle, cooled by subduction, should contribute to long-wavelength magnetic anomalies above subduction zones. We test this hypothesis with a quantitative model of the Cascadia...
Tropical cyclones and the flood hydrology of Puerto Rico
James A. Smith, Paula Sturdevant-Rees, Mary Lynn Baeck, Matthew C. Larsen
2005, Water Resources Research (41)
Some of the largest unit discharge flood peaks in the stream gaging records of the U.S. Geological Survey (USGS) have occurred in Puerto Rico. Many of these flood peaks are associated with tropical cyclones. Hurricane Georges, which passed directly over the island on 21–22 September 1998, produced record flood peaks...
Telemedicine diffusion in a developing country: The case of India (March 2004)
A. Pal, V.W.A. Mbarika, F. Cobb-Payton, P. Datta, S. McCoy
2005, IEEE Transactions on Information Technology in Biomedicine (9) 59-65
Telemedicine (health-care delivery where physicians examine distant patients using telecommunications technologies) has been heralded as one of several possible solutions to some of the medical dilemmas that face many developing countries. In this study, we examine the current state of telemedicine in a developing country, India. Telemedicine has brought a...
Reconstructing a 180 yr record of natural and anthropogenic induced low-oxygen conditions from Louisiana continental shelf sediments
L.E. Osterman, R.Z. Poore, P.W. Swarzenski, R.E. Turner
2005, Geology (33) 329-332
Hypoxia on the Louisiana continental shelf is tied to nutrient Loading and freshwater stratification from the Mississippi River. Variations in the relative abundance of low-oxygen-tolerant benthic foraminifers in four sediment cores from the Louisiana shelf provide a proxy record of low-oxygen events. Core chronologies are obtained using 210Pb dating techniques....
Movements of walruses radio-tagged in Bristol Bay, Alaska
Chadwick V. Jay, Susan Hills
2005, Arctic (58) 192-202
Satellite radio-location data from 57 adult male Pacific walruses (Odobenus rosmarus divergens) were used to estimate haul-out fidelity, broadly describe seasonal foraging distributions, and determine the approximate timing of autumn migration from Bristol Bay, Alaska. Data were collected intermittently during 1987–91 and 1995–2000, primarily during the period from May to...
A method for the use of landscape metrics in freshwater research and management
F.R. Kearns, N.M. Kelly, J.L. Carter, V.H. Resh
2005, Landscape Ecology (20) 113-125
Freshwater research and management efforts could be greatly enhanced by a better understanding of the relationship between landscape-scale factors and water quality indicators. This is particularly true in urban areas, where land transformation impacts stream systems at a variety of scales. Despite advances in landscape quantification methods, several studies...
Successional trends in Sonoran Desert abandoned agricultural fields in northern Mexico
A.E. Castellanos, M.J. Martinez, J.M. Llano, W. L. Halvorson, M. Espiricueta, I. Espejel
2005, Journal of Arid Environments (60) 437-455
Excessive ground-water use and saline intrusion to the aquifer led, in less than three decades, to an increase in abandoned agricultural fields at La Costa de Hermosillo, within the Sonoran Desert. Using a chronosequence from years since abandonment, patterns of field succession were developed. Contrary to most desert literature, species...
Catastrophic meltwater discharge down the Hudson Valley: A potential trigger for the Intra-Allerød cold period
Jeffrey P. Donnelly, Neal W. Driscoll, Elazar Uchupi, Loyd D. Keigwin, William C. Schwab, E. Robert Thieler, Stephen A. Swift
2005, Geology (33) 89-92
Glacial freshwater discharge to the Atlantic Ocean during deglaciation may have inhibited oceanic thermohaline circulation, and is often postulated to have driven climatic fluctuations. Yet attributing meltwater-discharge events to particular climate oscillations is problematic, because the location, timing, and amount of meltwater discharge are often poorly constrained. We present evidence...
Sonoran Desert winter annuals affected by density of red brome and soil nitrogen
L. F. Salo, G. R. McPherson, D. G. Williams
2005, American Midland Naturalist (153) 95-109
Red brome [Bromus madritensis subsp. rubens (L.) Husn.] is a Mediterranean winter annual grass that has invaded Southwestern USA deserts. This study evaluated interactions among 13 Sonoran Desert annual species at four densities of red brome from 0 to the equivalent of 1200 plants m−2. We examined these interactions at low...
Trematodes associated with mangrove habitat in Puerto Rican salt marshes
Kevin D. Lafferty, R. F. Hechinger, J. Lorda, L. Soler
2005, Journal of Parasitology (91) 697-699
Batillaria minima is a common snail in the coastal estuaries of Puerto Rico. This snail is host to a variety of trematodes, the most common being Cercaria caribbea XXXI, a microphallid species that uses crabs as second intermediate hosts. The prevalence of infection was higher (7.1%) near mangroves than on mudflats...
Wilcox group coal-bed methane in north-central Louisiana
F. Clayton Breland Jr., Peter D. Warwick
2005, Gulf Coast Association of Geological Societies Transactions (55) 39-46
Significant coal-bed gas resources may exist in subsurface Wilcox Group (Paleocene-Eocene) coal beds that are found across much of north-central Louisiana. About a dozen wells recently completed in Wilcox Group coal zones in this area have an initial production that ranges from 7 to 229 thousand cubic feet (Mcf) of...
Prenatal development in fishers (Martes pennanti)
H.C. Frost, W.B. Krohn, E.A. Bezembluk, R. Lott, C.R. Wallace
2005, Theriogenology (63) 1440-1453
We evaluated and quantified prenatal growth of fishers (Martes pennanti) using ultrasonography. Seven females gave birth to 21 kits. The first identifiable embryonic structures were seen 42 d prepartum; these appeared to be unimplanted blastocysts or gestational sacs, which subsequently implanted in the uterine horns. Maternal and fetal heart rates...
The effect of thiamine injection on upstream migration, survival, and thiamine status of putative thiamine-deficient coho salmon
J.D. Fitzsimons, B. Williston, P. Amcoff, L. Balk, C. Pecor, H. G. Ketola, J. P. Hinterkopf, D. C. Honeyfield
2005, Journal of Aquatic Animal Health (17) 48-58
A diet containing a high proportion of alewives Alosa pseudoharengus results in a thiamine deficiency that has been associated with high larval salmonid mortality, known as early mortality syndrome (EMS), but relatively little is known about the effects of the deficiency on adults. Using thiamine injection (50 mg thiamine/kg body...
Naturally occurring secondary nutritional hyperparathyroidism in cattle egrets (Bubulcus ibis) from Central Texas
David N. Phalen, Mark L. Drew, C. Contreras, K. Roset, Miguel A. Mora
2005, Journal of Wildlife Diseases (41) 401-415
Naturally occurring secondary nutritional hyperparathyroidism is described in the nestlings of two colonies of cattle egrets (Bubulcus ibis) from Central Texas (Bryan and San Antonio, Texas, USA). Nestlings from a third colony (Waco, Texas, USA) were collected in a subsequent year for comparison. Birds from the first two colonies consistently...
Dating Plio-Pleistocene glacial sediments using the cosmic-ray-produced radionuclides 10Be and 26Al
G. Balco, J. O. H. Stone, C. Jennings
2005, American Journal of Science (305) 1-41
We use the cosmic-ray-produced radionuclides 26Al and 10Be to date Plio-Pleistocene glacial sediment sequences. These two nuclides are produced in quartz at a fixed ratio, but have different decay constants. If a sample is exposed at the surface for a time and then buried by overburden and thus removed from the cosmic-ray...
From the field: Brown bear habituation to people — Safety, risks, and benefits
Stephen Herrero, Tom Smith, Terry D. DeBruyn, Kerry Gunther, Colleen A. Matt
2005, Wildlife Society Bulletin (33) 362-373
Recently, brown bear (Ursus arctos) viewing has increased in coastal Alaska and British Columbia, as well as in interior areas such as Yellowstone National Park. Viewing is most often being done under conditions that offer acceptable safety to both people and bears. We analyze and comment on the underlying processes...
Combined use of the ASK and SHK-1 cell lines to enhance the detection of infectious salmon anemia virus
J.B. Rolland, D. Bouchard, J. Coll, J. R. Winton
2005, Journal of Veterinary Diagnostic Investigation (17) 151-157
Infectious salmon anemia (ISA) is a severe disease primarily affecting commercially farmed Atlantic salmon (Salmo salar) in seawater. The disease has been reported in portions of Canada, the United Kingdom, the Faroe Islands, and the United States. Infectious salmon anemia virus (ISAV), the causative agent of ISA, has also been...
Seasonal marine growth of Bristol Bay sockeye salmon (Oncorhynchus nerka) in relation to competition with Asian pink salmon (O. gorbuscho) and the 1977 ocean regime shift
Gregory T. Ruggerone, Ed Farley, Jennifer L. Nielsen, Peter Hagen
2005, Fishery Bulletin (103) 355-370
Recent research demonstrated significantly lower growth and survival of Bristol Bay sockeye salmon (Oncorhynchus nerka) during odd-numbered years of their second or third years at sea (1975, 1977, etc.), a trend that was opposite that of Asian pink salmon (O. gorbuscha) abundance. Here we evaluated seasonal growth trends of Kvichak...
Mid-Pliocene deep-sea bottom-water temperatures based on ostracode Mg/Ca ratios
T. M. Cronin, H.J. Dowsett, Gary S. Dwyer, P.A. Baker, M.A. Chandler
2005, Marine Micropaleontology (54) 249-261
We studied magnesium:calcium (Mg/Ca) ratios in shells of the deep-sea ostracode genus Krithe from a short interval in the middle Pliocene between 3.29 and 2.97 Ma using deep-sea drilling sites in the North and South Atlantic in order to estimate bottom water temperatures (BWT) during a period of climatic warmth....
