Oxygen and hydrogen isotope fractionation in serpentine-water and talc-water systems from 250 to 450 °C, 50 MPa
Peter J. Saccocia, Jeffrey S. Seewald, Wayne C. Shanks III
2009, Geochimica et Cosmochimica Acta (73) 6789-6804
Oxygen and hydrogen isotope fractionation factors in the talc–water and serpentine–water systems have been determined by laboratory experiment from 250 to 450 °C at 50 MPa using the partial exchange technique. Talc was synthesized from brucite + quartz, resulting in nearly 100% exchange during reaction at 350 and 450 °C. For serpentine, D–H exchange was...
Multiple dendrochronological responses to the eruption of Cinder Cone, Lassen Volcanic National Park, California
P.R. Sheppard, M.H. Ort, K.C. Anderson, M.A. Clynne, E.M. May
2009, Dendrochronologia (27) 213-221
Two dendrochronological properties – ring width and ring chemistry – were investigated in trees near Cinder Cone in Lassen Volcanic National Park, northeastern California, for the purpose of re-evaluating the date of its eruption. Cinder Cone is thought to have erupted in AD 1666 based on ring-width evidence, but interpreting...
Stratigraphic controls on seawater intrusion and implications for groundwater management, Dominguez Gap area of Los Angeles, California, USA
Tracy Nishikawa, Adam J. Siade, Eric G. Reichard, Daniel J. Ponti, A.G. Canales, T.A. Johnson
2009, Hydrogeology Journal (17) 1699-1725
Groundwater pumping has led to extensive water-level declines and seawater intrusion in coastal Los Angeles, California (USA). A SUTRA-based solute-transport model was developed to test the hydraulic implications of a sequence-stratigraphic model of the Dominguez Gap area and to assess the effects of water-management scenarios. The model is two-dimensional, vertical...
Ultraviolet-ozone treatment reduces levels of disease-associated prion protein and prion infectivity
C.J. Johnson, P. Gilbert, D. McKenzie, J.A. Pedersen, Judd M. Aiken
2009, BMC Research Notes (2)
Background. Transmissible spongiform encephalopathies (TSEs) are a group of fatal neurodegenerative diseases caused by novel infectious agents referred to as prions. Prions appear to be composed primarily, if not exclusively, of a misfolded isoform of the cellular prion protein. TSE infectivity is remarkably stable and can resist many aggressive decontamination...
Sedimentary constraints on late Quaternary lake-level fluctuations at Bear Lake, Utah and Idaho
J. P. Smoot, J. G. Rosenbaum
2009, Special Paper of the Geological Society of America 263-290
A variety of sedimentological evidence was used to construct the lake-level history for Bear Lake, Utah and Idaho, for the past ???25,000 years. Shorelines provide evidence of precise lake levels, but they are infrequently preserved and are poorly dated. For cored sediment similar to that in the modern lake, grain-size...
Evaluation of a moderate resolution, satellite-based impervious surface map using an independent, high-resolution validation data set
J. W. Jones, T. Jarnagin
2009, Journal of Hydrologic Engineering (14) 369-376
Given the relatively high cost of mapping impervious surfaces at regional scales, substantial effort is being expended in the development of moderate-resolution, satellite-based methods for estimating impervious surface area (ISA). To rigorously assess the accuracy of these data products high quality, independently derived validation data are needed. High-resolution data were...
Recent technologies usher in new era of coastal geomorphology research
J. R. Gray, J.M. Bernard, G. E. Schwarz, D. W. Stewart, K.T. Ray
2009, Eos, Transactions, American Geophysical Union (90) 198-199
[No abstract available]...
Fast forward modeling of Titan's infrared spectra to invert VIMS/Cassini hyperspectral images
S. Rodriguez, Stéphane Le Mouélic, P. Rannou, J. #NAME? Combe, L.L. Corre, G. Tobie, J. W. Barnes, Christophe Sotin, R. H. Brown, K. H. Baines, B. J. Buratti, R. N. Clark, P. D. Nicholson
2009, Conference Paper, WHISPERS '09 - 1st Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing
The surface of Titan, the largest icy moon of Saturn, is veiled by a very thick and hazy atmosphere. The Visual and Infrared Mapping Spectrometer onboard the Cassini spacecraft, in orbit around Saturn since July 2004, conduct an intensive survey of Titan with the objective to understand the complex nature...
Geospatial Data Used in Water-Level and Land-Subsidence Studies in the Mojave River and Morongo Groundwater Basins for 2008
Carolyn Glockhoff, Christina L. Stamos
2009, Report
During 2008, the U.S. Geological Survey and other agencies made approximately 2,500 water-level measurements in the Mojave River and Morongo groundwater basins. These data document recent conditions and, when compared with previous data, changes in groundwater levels. A water-level contour map was drawn using data from about 700 wells, providing...
Evidence of multidecadal climate variability and the Atlantic Multidecadal Oscillation from a Gulf of Mexico sea-surface temperature-proxy record
R.Z. Poore, K. L. DeLong, J.N. Richey, T. M. Quinn
2009, Geo-Marine Letters (29) 477-484
A comparison of a Mg/Ca-based sea-surface temperature (SST)-anomaly record from the northern Gulf of Mexico, a calculated index of variability in observed North Atlantic SST known as the Atlantic Multidecadal Oscillation (AMO), and a tree-ring reconstruction of the AMO contain similar patterns of variation over the last 110 years. Thus,...
Spatially detailed quantification of metal loading for decision making: Metal mass loading to American fork and Mary Ellen Gulch, Utah
B. A. Kimball, R.L. Runkel
2009, Mine Water and the Environment (28) 274-290
Effective remediation requires an understanding of the relative contributions of metals from all sources in a catchment, and that understanding must be based on a spatially detailed quantification of metal loading. A traditional approach to quantifying metal loading has been to measure discharge and chemistry at a catchment outlet. This...
A quarter-million years of paleoenvironmental change at Bear Lake, Utah and Idaho
D. S. Kaufman, Jordon Bright, W.E. Dean, J. G. Rosenbaum, K. Moser, R. Scott Anderson, Steven M. Colman, C.W. Heil Jr., Gonzalo Jiménez-Moreno, M.C. Reheis, K. R. Simmons
2009, Special Paper of the Geological Society of America 311-351
A continuous, 120-m-long core (BL00-1) from Bear Lake, Utah and Idaho, contains evidence of hydrologic and environmental change over the last two glacial-interglacial cycles. The core was taken at 41.95??N, 111.31??W, near the depocenter of the 60-m-deep, spring-fed, alkaline lake, where carbonate-bearing sediment has accumulated continuously. Chronological control is poor...
On carbon sequestration in desert ecosystems
W. H. Schlesinger, J. Belnap, G. Marion
2009, Global Change Biology (15) 1488-1490
Recent reports of net ecosysytem production >100 g C m-2 yr-1 in deserts are incompatible with existing measurements of net primary production and carbon pools in deserts. The comparisions suggest that gas exchange measurements should be used with caution and better validation if they are expected to indicate the magnitude...
Twentieth-century decline of large-diameter trees in Yosemite National Park, California, USA
J.A. Lutz, J. W. van Wagtendonk, J.F. Franklin
2009, Forest Ecology and Management (257) 2296-2307
Studies of forest change in western North America often focus on increased densities of small-diameter trees rather than on changes in the large tree component. Large trees generally have lower rates of mortality than small trees and are more resilient to climate change, but these assumptions have rarely been examined...
Assigning land use to supply wells for the statistical characterization of regional groundwater quality: Correlating urban land use and VOC occurrence
T.D. Johnson, K. Belitz
2009, Journal of Hydrology (370) 100-108
Many national and regional groundwater studies have correlated land use "near" a well, often using a 500 m radius circle, with water quality. However, the use of a 500 m circle may seem counterintuitive given that contributing areas are expected to extend up-gradient from wells, and not be circular in...
Fate of sulfamethoxazole, 4-nonylphenol, and 17β-estradiol in groundwater contaminated by wastewater treatment plant effluent
Larry B. Barber, Steffanie H. Keefe, Denis R. LeBlanc, Paul M. Bradley, Francis H. Chapelle, Michael T. Meyer, Keith A. Loftin, Dana W. Koplin, Fernando Rubio
2009, Environmental Science & Technology (43) 4843-4850
Organic wastewater contaminants (OWCs) were measured in samples collected from monitoring wells located along a 4.5-km transect of a plume of groundwater contaminated by 60 years of continuous rapid infiltration disposal of wastewater treatment plant effluent. Fifteen percent of the 212 OWCs analyzed were detected, including the antibiotic sulfamethoxazole (SX),...
Soil amendment effects on the exotic annual grass Bromus tectorum L. and facilitation of its growth by the native perennial grass Hilaria jamesii (Torr.) Benth
J. Belnap, S. K. Sherrod
2009, Plant Ecology (201) 709-721
Greenhouse experiments were undertaken to identify soil factors that curtail growth of the exotic annual grass Bromus tectorum L. (cheatgrass) without significantly inhibiting growth of native perennial grasses (here represented by Hilaria jamesii [Torr.] Benth). We grew B. tectorum and H. jamesii alone (monoculture pots) and together (combination pots) in...
New geochronologic and stratigraphic evidence confirms the paleocene age of the dinosaur-bearing ojo alamo sandstone and animas formation in the San Juan Basin, New Mexico and Colorado
J.E. Fassett
2009, Palaeontologia Electronica (12)
Dinosaur fossils are present in the Paleocene Ojo Alamo Sandstone and Animas Formation in the San Juan Basin, New Mexico, and Colorado. Evidence for the Paleo-cene age of the Ojo Alamo Sandstone includes palynologic and paleomagnetic data. Palynologic data indicate that the entire Ojo Alamo Sandstone, including the lower dinosaur-bearing...
Comparative endocrinology in the 21st century
R.J. Denver, P.M. Hopkins, S. D. McCormick, C.R. Propper, L. Riddiford, S.A. Sower, J.C. Wingfield
2009, Integrative and Comparative Biology (49) 339-348
Hormones coordinate developmental, physiological, and behavioral processes within and between all living organisms. They orchestrate and shape organogenesis from early in development, regulate the acquisition, assimilation, and utilization of nutrients to support growth and metabolism, control gamete production and sexual behavior, mediate organismal responses to environmental change, and allow for...
A case study of two M~5 mainshocks in Anza, California: Is the footprint of an aftershock sequence larger than we think?
Karen R. Fritts, Debi Kilb
2009, Bulletin of the Seismological Society of America (99) 2721-2735
It has been traditionally held that aftershocks occur within one to two fault lengths of the mainshock. Here we demonstrate that this perception has been shaped by the sensitivity of seismic networks. The 31 October 2001 Mw 5.0 and 12 June 2005 Mw 5.2 Anza mainshocks in southern California occurred in the middle of...
Variable growth and longevity of yellow bullhead (Ameiurus natalis) in the Everglades of south Florida, USA
D.J. Murie, D.C. Parkyn, W.F. Loftus, L.G. Nico
2009, Journal of Applied Ichthyology (25) 740-745
Yellow bullhead (Ictaluridae: Ameiurus natalis) is the most abundant ictalurid catfish in the Everglades of southern Florida, USA, and, as both prey and predator, is one of many essential components in the ecological-simulation models used in assessing restoration success in the Everglades. Little is known of its biology and life...
Organic geochemistry of resins from modern Agathis australis and Eocene resins from New Zealand: Diagenetic and taxonomic implications
P.C. Lyons, Maria Mastalerz, W. H. Orem
2009, International Journal of Coal Geology (80) 51-62
A maturation series of resins and fossil resins from New Zealand, ranging in age from Modern to Eocene and ranging from uncoalified to high volatile C bituminous coal, were analyzed by elemental, pyrolysis-gas chromatography (Py-GC), Fourier Transform infrared (FTir), and solid-state 13C nuclear magnetic resonance (13C NMR) techniques. For comparison,...
Seismic analysis of clinoform depositional sequences and shelf-margin trajectories in Lower Cretaceous (Albian) strata, Alaska North Slope
David W. Houseknecht, Kenneth J. Bird, Christopher J. Schenk
2009, Basin Research (21) 644-654
Lower Cretaceous strata beneath the Alaska North Slope include clinoform depositional sequences that filled the western Colville foreland basin and overstepped the Beaufort rift shoulder. Analysis of Albian clinoform sequences with two‐dimensional (2D) seismic data resulted in the recognition of seismic facies inferred to represent lowstand, transgressive and highstand systems...
Pathogenicity of West Nile virus and response to vaccination in sandhill cranes (Grus canadensis) using a killed vaccine
Glenn H. Olsen, Kimberli J.G. Miller, Douglas E. Docherty, Valerie I. Shearn-Bochsler, Louis Sileo
2009, Journal of Zoo and Wildlife Medicine (40) 263-271
West Nile virus was introduced into the United States in the vicinity of New York, New York, USA in 1999. The virus has since killed large numbers of birds nationwide, especially, but not limited to, crows (Corvus brachyrhinchos). One sandhill crane (Grus canadensis) at the Bridgeport Zoo (Bridgeport, Connecticut, USA)...
Allen's big-eared bat (Idionycteris phyllotis) documented in colorado based on recordings of its distinctive echolocation call
M. A. Hayes, K.W. Navo, L. Bonewell, C.J. Mosch, Rick A. Adams
2009, Southwestern Naturalist (54) 499-501
Allen's big-eared bat (Idionycteris phyllotis) inhabits much of the southwestern USA, but has not been documented in Colorado. We recorded echolocation calls consistent with I. phyllotis near La Sal Creek, Montrose County, Colorado. Based on characteristics of echolocation calls and flight behavior, we conclude that the echolocation calls described here...
