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...
Contemporaneous trachyandesitic and calc-alkaline volcanism of the Huerto Andesite, San Juan Volcanic Field, Colorado, USA
F. Parat, M.A. Dungan, P. W. Lipman
2005, Journal of Petrology (46) 859-891
Locally, voluminous andesitic volcanism both preceded and followed large eruptions of silicic ash-flow tuff from many calderas in the San Juan volcanic field. The most voluminous post-collapse lava suite of the central San Juan caldera cluster is the 28 Ma Huerto Andesite, a diverse assemblage erupted from at least 5–6 volcanic...
Loosely bound oxytetracycline in riverine sediments from two tributaries of the Chesapeake Bay
N.S. Simon
2005, Environmental Science & Technology (39) 3480-3487
The fate of antibiotics that bind to riverine sediment is not well understood. A solution used in geochemical extraction schemes to determine loosely bound species in sediments, 1 M MgCl2 (pH 8), was chosen to determine loosely bound, and potentially bioavailable, tetracycline antibiotics (TCs), including oxytetracycline (5-OH tetracycline)...
Biochemical effects of lead, zinc, and cadmium from mining on fish in the Tri-States district of northeastern Oklahoma, USA
Christopher J. Schmitt, Jeffrey J. Whyte, William G. Brumbaugh, Donald E. Tillitt
2005, Environmental Toxicology and Chemistry (24) 1483-1495
We assessed the exposure of fish from the Spring and Neosho Rivers in northeast Oklahoma, USA, to lead, zinc, and cadmium from historical mining in the Tri-States Mining District (TSMD). Fish (n = 74) representing six species were collected in October 2001 from six sites on the Spring and Neosho...
Structure and stress state of Hawaiian island basalts penetrated by the Hawaii Scientific Drilling Project deep core hole
R. H. Morin, R.H. Wilkens
2005, Journal of Geophysical Research B: Solid Earth (110) 1-8
As part of the Hawaii Scientific Drilling Project (HSDP), an exploratory hole was drilled in 1993 to a depth of 1056 meters below sea level (mbsl) and a deeper hole was drilled to 3098 mbsl in 1999. A set of geophysical well logs was obtained in the deeper hole that...
An analysis of region-of-influence methods for flood regionalization in the Gulf-Atlantic Rolling Plains
Ken Eng, Gary D. Tasker, P. C. D. Milly
2005, Journal of the American Water Resources Association (41) 135-143
Region-of-influence (RoI) approaches for estimating stream flow characteristics at ungaged sites were applied and evaluated in a case study of the 50-year peak discharge in the Gulf-Atlantic Rolling Plains of the southeastern United States. Linear regression against basin characteristics was performed for each ungaged site considered based on data from...
Broad-scale predictors of canada lynx occurrence in eastern North America
C.L. Hoving, D.J. Harrison, W.B. Krohn, R.A. Joseph, M. O'Brien
2005, Journal of Wildlife Management (69) 739-751
The Canada lynx (Lynx canadensis) is listed as a threatened species throughout the southern extent of its geographic range in the United States. Most research on lynx has been conducted in the western United States and Canada; little is known about the ecology of lynx in eastern North America. To...
Hydrologic properties of coal beds in the Powder River Basin, Montana I. Geophysical log analysis
R. H. Morin
2005, Journal of Hydrology (308) 227-241
As part of a multidisciplinary investigation designed to assess the implications of coal-bed methane development on water resources for the Powder River Basin of southeastern Montana, six wells were drilled through Paleocene-age coal bedsalong a 31-km east–west transect within the Tongue River drainage basin. Analysis of geophysical logs obtained...
U-Pb zircon geochronology of Paleoproterozoic plutons from the northern midcontinent, USA: Evidence for subduction flip and continued convergence after geon 18 Penokean orogenesis
D.K. Holm, W. R. Van Schmus, L.C. MacNeill, Terrence Boerboom, D. Schweitzer, D. Schneider
2005, Geological Society of America Bulletin (117) 259-275
We propose that the late Paleoproterozoic igneous and deformational history preserved in the northern midcontinent United States can be explained by a change in subduction-polarity from geon 18 south-dipping subduction during Penokean accretion to geon 17 north-dipping subduction as convergence continued after Penokean orogenesis. New U-Pb zircon ages indicate that...
Magmatic unrest beneath Mammoth Mountain, California
D.P. Hill, S. Prejean
2005, Journal of Volcanology and Geothermal Research (146) 257-283
Mammoth Mountain, which stands on the southwest rim of Long Valley caldera in eastern California, last erupted ∼57,000 years BP. Episodic volcanic unrest detected beneath the mountain since late 1979, however, emphasizes that the underlying volcanic system is still active and capable of producing future volcanic eruptions. The unrest symptoms...
The Pinto shear zone; a Laramide synconvergent extensional shear zone in the Mojave Desert region of the southwestern United States
M.L. Wells, M.A. Beyene, T.L. Spell, J.L. Kula, D. M. Miller, K.A. Zanetti
2005, Journal of Structural Geology (27) 1697-1720
The Pinto shear zone is one of several Late Cretaceous shear zones within the eastern fringe of the Mesozoic magmatic arc of the southwest Cordilleran orogen that developed synchronous with continued plate convergence and backarc shortening. We demonstrate an extensional origin for the shear zone by describing the shear-zone geometry...
Assessing the competitive ability of Japanese stilt grass, Microstegium vimineum (Trin.) A. Camus
S. A. Leicht, J. A. Silander Jr., K. Greenwood
2005, Journal of the Torrey Botanical Society (132) 573-580
Microstegium vimineum (Japanese stilt grass) is an invasive grass in the eastern half of the United States which can form dense monocultures in forest understories, displacing native species. Although the loss of native species has been observed in the field, the actual competitive ability of this grass has not been...
Tree mortality, canopy turnover, and woody detritus in old cove forests of the southern Appalachians
Richard T. Busing
2005, Ecology (86) 73-84
A long-term study of tree mortality, canopy turnover, and coarse woody detritus inputs was conducted in cove forests of the Great Smoky Mountains, Tennessee, USA. Seven old-growth stands were studied over a 10-yr period using 0.6–1.0 ha plots. Annual mortality of trees >10 cm dbh was 0.5–1.4% among stands (mean...
Toxic Alexandrium blooms in the western Gulf of Maine: The plume advection hypothesis revisited
D.M. Anderson, B.A. Keafer, W.R. Geyer, R. P. Signell, T.C. Loder
2005, Limnology and Oceanography (50) 328-345
The plume advection hypothesis links blooms of the toxic dinoflagellate Alexandrium fundyense in the western Gulf of Maine (GOM) to a buoyant plume derived from river outflows. This hypothesis was examined with cruise and moored-instrument observations in 1993 when levels of paralytic shellfish poisoning (PSP) toxins were high, and in...
Anatahan, Northern Mariana Islands: Reconnaissance geological observations during and after the volcanic crisis of spring 1990, and monitoring prior to the May 2003 eruption
S.K. Rowland, J. P. Lockwood, F. A. Trusdell, R. B. Moore, M. K. Sako, R. Y. Koyanagi, G. Kojima
2005, Journal of Volcanology and Geothermal Research (146) 26-59
Anatahan island is 9.5 km east–west by 3.5 km north–south and truncated by an elongate caldera 5 km east–west by 2.5 km north–south. A steep-walled pit crater ∼1 km across and ∼200 m deep occupies the eastern part of the caldera. The island is the summit region of a mostly...
Factors influencing the biogeochemistry of sedimentary carbon and phosphorus in the Sacramento-San Joaquin Delta
E. B. Nilsen, M. L. Delaney
2005, Estuaries (28) 653-663
This study characterizes organic carbon (Corganic) and phosphorus (P) geochemistry in surface sediments of the Sacramento-San Joaquin Delta, California. Sediment cores were collected from five sites on a sample transect from the edge of the San Francisco Bay eastward to the freshwater Consumnes River. The top 8 cm of each...
Biomonitoring of Environmental Status and Trends (BEST) Program: Environmental contaminants and their effects on fish in the Rio Grande Basin
Christopher J. Schmitt, Gail M. Dethloff, Jo Ellen Hinck, Timothy M. Bartish, Vicki Blazer, James J. Coyle, Nancy D. Denslow, Donald E. Tillitt
2004, Scientific Investigations Report 2004-5108
We collected, examined, and analyzed 368 fish of seven species from 10 sites in the Rio Grande Basin (RGB) during late 1997 and early 1998. Four sites were National Contaminant Biomonitoring Program (NCBP) stations where organochlorine ad elemental contaminants in fish had been monitored from 1969 and through 1986. The...
Historical trend in the ratio of solid to total precipitation
Thomas G. Huntington, Glenn A. Hodgkins, B.D. Keim, Robert W. Dudley
2004, Conference Paper, Proceedings of the 60th Annual Eastern Snow Conference : June 4-6, 2003, Sherbrooke, Quebec, Canada
No abstract available...
Optimization of limestone drains for long- term treatment of acidic mine drainage, Swatara Creek Basin, Schuylkill County, PA
Charles A. Cravotta III,, S.J. Ward, Daniel J. Koury, R. D. Koch
2004, Conference Paper, Proceedings America Society of Mining and Reclamation, 2004
Limestone drains were constructed in 1995, 1997, and 2000 to treat acidic mine drainage (AMD) from the Orchard, Buck Mtn., and Hegins discharges, respectively, in the Swatara Creek Basin, Southern Anthracite Coalfield, east-central Pennsylvania. This report summarizes the construction characteristics and performance of each of the limestone drains on the...
Atlantic Flyway review: Region IV - Fall 2003
Chandler S. Robbins
2004, North American Bird Bander (29) 124-131
We welcome the Eden Mill station in northeastern Maryland to Region IV this year. With three stations reporting their worst year ever, we really need to be refreshed. After a cool and wet July, August was hot and wet in the east. Temperatures in September remained close to normal, but...
Nest-site selection and hatching success of waterbirds in coastal Virginia: Some results of habitat manipulation
R.A. Rounds, R.M. Erwin, J.H. Porter
2004, Journal of Field Ornithology (75) 317-329
Rising sea levels in the mid-Atlantic region pose a long-term threat to marshes and their avian inhabitants. The Gull-billed Tern (Sterna nilotica), Common Tern (S. hirundo), Black Skimmer (Rynchops niger), and American Oystercatcher (Haematopus palliatus), species of concern in Virginia, nest on low shelly perimeters of salt marsh islands on...
Estimating survival and breeding probability for pond-breeding amphibians: a modified robust design
L.L. Bailey, W. L. Kendall, D.R. Church, H.M. Wilbur
2004, Ecology (85) 2456-2466
Many studies of pond-breeding amphibians involve sampling individuals during migration to and from breeding habitats. Interpreting population processes and dynamics from these studies is difficult because (1) only a proportion of the population is observable each season, while an unknown proportion remains unobservable (e.g., non-breeding adults) and (2) not all...
Mute swans and their Chesapeake Bay habitats: proceedings of a symposium
Matthew C. Perry, editor(s)
2004, Information and Technology Report 2004-0005.
The symposium 'Mute Swans and their Chesapeake Bay Habitats,' held on June 7, 2001, provided a forum for biologists and managers to share research findings and management ideas concerning the exotic and invasive mute swan (Cygnus olar). This species has been increasing in population size and is considered by...
Modeling survival and movement of resident giant Canada goose populations in the Atlantic flyway
M.W. Miller, W. L. Kendall, J.B. Hestbeck
Timothy J. Moser, Ricky D. Lien, Kurt C. VerCauterren, Kenneth F. Abraham, David E. Andersen, John G. Bruggink, John M. Coluccy, David A. Graber, James O. Leafloor, David R. Luukkonen, Robert E. Trost, editor(s)
2004, Book chapter, Proceedings of the 2003 International Canada Goose Symposium: papers, abstracts, and posters from the Symposium held in Madison, Wisconsin, 19-21 March 2003
Distribution of resident giant Canada geese (Branta canadensis maxima) has changed markedly in the Atlantic Flyway in recent decades. This change may be related to habitat variation or to changes in hunting regulations. We attempt to assess impacts of hunting regulations on survival, movement, and harvest rate of...
Simulation of ground-water flow in the Vevay Township area, Ingham County, Michigan
Carol L. Luukkonen, Andreanne Simard
2004, Open-File Report 2004-1270
Ground water is the primary source of water for domestic, public-supply, and industrial use within the Tri-County region that includes Clinton, Eaton, and Ingham Counties in Michigan. Because of the importance of this ground-water resource, numerous communities, including the city of Mason in Ingham County, have begun local Wellhead Protection...
