Stratigraphic and geochemical evolution of an oceanic arc upper crustal section: The Jurassic Talkeetna Volcanic Formation, south-central Alaska
P.D. Clift, A.E. Draut, P.B. Kelemen, J. Blusztajn, A. Greene
2005, Geological Society of America Bulletin (117) 902-925
The Early Jurassic Talkeetna Volcanic Formation forms the upper stratigraphic level of an oceanic volcanic arc complex within the Peninsular Terrane of south-central Alaska. The section comprises a series of lavas, tuffs, and volcaniclastic debris-How and flow turbidite deposits, showing significant lateral facies variability. There is a general trend toward...
The fate of estrogenic hormones in an engineered treatment wetland with dense macrophytes
J.L. Gray, D.L. Sedlak
2005, Water Environment Research (77) 24-31
Recently, the estrogenic hormones 17??-estradiol (E2) and 17??-ethinyl estradiol (EE2) have been detected in municipal wastewater effluent and surface waters at concentrations sufficient to cause feminization of male fish. To evaluate the fate of steroid hormones in an engineered treatment wetland, lithium chloride, E2, and EE 2 were added to...
Vertical variations of mercury in Pennsylvanian coal beds from Indiana
Maria Mastalerz, A. Drobniak
2005, International Journal of Coal Geology (63) 36-57
Twenty-three in-situ coal sections were sampled in Indiana mines to investigate mercury (Hg) concentrations, with a special reference to in-seam vertical variations in Hg distribution. In addition to raw coal, corresponding float fractions were also analyzed to evaluate the effectiveness of Hg reduction during conventional pre-combustion washing. Hg content in...
Distribution of aseismic slip rate on the Hayward fault inferred from seismic and geodetic data
D.A. Schmidt, R. Burgmann, R.M. Nadeau, M. d'Alessio
2005, Journal of Geophysical Research B: Solid Earth (110) 1-15
We solve for the slip rate distribution on the Hayward fault by performing a least squares inversion,of geodetic and seismic data sets. Our analysis focuses on the northern 60 km of the fault. Interferometric synthetic aperture radar (InSAR) data from 13 independent ERS interferograms are stacked to obtain range change...
Brucite microbialites in living coral skeletons: Indicators of extreme microenvironments in shallow-marine settings
L.D. Nothdurft, G.E. Webb, N.A. Buster, C. W. Holmes, J.E. Sorauf, J.T. Kloprogge
2005, Geology (33) 169-172
Brucite [Mg(OH)2] microbialites occur in vacated interseptal spaces of living scleractinian coral colonies (Acropora, Pocillopora, Porites) from subtidal and intertidal settings in the Great Barrier Reef, Australia, and subtidal Montastraea from the Florida Keys, United States. Brucite encrusts microbial filaments of endobionts (i.e., fungi, green algae, cyanobacteria) growing under organic...
The persistence of the water budget myth and its relationship to sustainability
J.F. Devlin, M. Sophocleous
2005, Hydrogeology Journal (13) 549-554
Sustainability and sustainable pumping are two different concepts that are often used interchangeably. The latter term refers to a pumping rate that can be maintained indefinitely without mining an aquifer, whereas the former term is broader and concerns such issues as ecology and water quality, among others, in addition to...
Refining boat electrofishing equipment to improve consistency and reduce harm to fish
L.E. Miranda
2005, North American Journal of Fisheries Management (25) 609-618
A major concern with electrofishing is the standardization of sampling equipment and methods, particularly when collections are used to monitor spatial and temporal changes in fish communities. Standardization can not only ensure that stock assessment is consistent - that is, the data collected over time and space have equal meaning...
Has white pox disease been affecting Acropora palmata for over 30 years?
C.S. Rogers, K.P. Sutherland, J.W. Porter
2005, Coral Reefs (24) 194
[No abstract available]...
Comparing maps of mean monthly surface temperature and precipitation for Alaska and adjacent areas of Canada produced by two different methods
James J. Simpson, Gary L. Hufford, Christopher Daly, Jared S. Berg, Michael D. Fleming
2005, Arctic (58) 137-161
Maps of mean monthly surface temperature and precipitation for Alaska and adjacent areas of Canada, produced by Oregon State University's Spatial Climate Analysis Service (SCAS) and the Alaska Geospatial Data Clearinghouse (AGDC), were analyzed. Because both sets of maps are generally available and in use by the community, there is...
Radium isotopes in Cayuga Lake, New York: Indicators of inflow and mixing processes
T. F. Kraemer
2005, Limnology and Oceanography (50) 158-168
Naturally occurring radium isotopes (223Ra, 224Ra, 226Ra, and 228Ra) were measured in lake and tributary water of Cayuga Lake, New York, during the course of a vernal inflow event in the spring of 2001. A large influx of groundwater, probably from a carbonate aquifer, entered the lake at its extreme...
Waveform tomography of crustal structure in the south San Francisco Bay region
F. F. Pollitz, J.P. Fletcher
2005, Journal of Geophysical Research B: Solid Earth (110) 1-37
We utilize a scattering-based seismic tomography technique to constrain crustal tructure around the southern San Francisco Bay region (SFBR). This technique is based on coupled traveling wave scattering theory, which has usually been applied to the interpretation of surface waves in large regional-scale studies. Using fully three-dimensional kernels, this technique...
Central Arctic caribou and petroleum development: Distributional, nutritional, and reproductive implications
Raymond D. Cameron, Walter T. Smith, Robert G. White, Brad Griffith
2005, Arctic (58) 1-9
We synthesize findings from cooperative research on effects of petroleum development on caribou (Rangifer tarandus granti) of the Central Arctic Herd (CAH). The CAH increased from about 6000 animals in 1978 to 23000 in 1992, declined to 18 000 by 1995, and again increased to 27 000 by 2000. Net...
Distinguishing base-level change and climate signals in a Cretaceous alluvial sequence
T. White, B. Witzke, G.A. Ludvigson, R. Brenner
2005, Geology (33) 13-16
We present the results of oxygen isotope and electron-microprobe analyses of sphaerosiderites obtained from Cretaceous paleosols in Iowa. The sphaerosiderite ??18O values record Cretaceous meteoric groundwater chemistry and an overall waning of brackish groundwater inundation during alluvial-plain aggradation and soil genesis. We focus on horizons that precipitated from freshwater, in...
Groundwater recharge and sustainability in the High Plains aquifer in Kansas, USA
M. Sophocleous
2005, Hydrogeology Journal (13) 351-365
Sustainable use of groundwater must ensure not only that the future resource is not threatened by overuse, but also that natural environments that depend on the resource, such as stream baseflows, riparian vegetation, aquatic ecosystems, and wetlands are protected. To properly manage groundwater resources, accurate information about the inputs (recharge)...
Dissolved inorganic nitrogen pools and surface flux under different brackish marsh vegetation types, common reed (Phragmites australis) and salt hay (Spartina patens)
L. Windham-Myers
2005, Biogeochemistry (75) 289-304
The current expansion of Phragmites australis into the high marsh shortgrass (Spartina patens, Distichlis spicata) communities of eastern U.S. salt marshes provided an opportunity to identify the influence of vegetation types on pools and fluxes of dissolved inorganic nitrogen (DIN). Two brackish tidal marshes of the National Estuarine Research Reserve...
Seismic hazard in the South Carolina coastal plain: 2002 update of the USGS national seismic hazard maps
C.H. Cramer, T.W. Mays
Wallendorf L.Ewing L.Rogers S.Jones C., editor(s)
2005, Conference Paper, Solutions to Coastal Disasters 2005 - Proceedings of the Conference
The damaging 1886 moment magnitude ???7 Charleston, South Carolina earthquake is indicative of the moderately likely earthquake activity along this portion of the Atlantic Coast. A recurrence of such an earthquake today would have serious consequences for the nation. The national seismic hazard maps produced by the U.S. Geological Survey...
Comparing electronic probes for volumetric water content of low-density feathermoss
P.P. Overduin, K. Yoshikawa, D.L. Kane, J.W. Harden
2005, Sensor Review (25) 215-221
Purpose - Feathermoss is ubiquitous in the boreal forest and across various land-cover types of the arctic and subarctic. A variety of affordable commercial sensors for soil moisture content measurement have recently become available and are in use in such regions, often in conjunction with fire-susceptibility or ecological studies. Few...
Mycobacterium pseudoshottsii sp. nov., a slowly growing chromogenic species isolated from Chesapeake Bay striped bass (Morone saxatilis)
M. W. Rhodes, H. Kator, A. McNabb, C. Deshayes, J.-M. Reyrat, B. A. Brown-Elliott, R. Wallace Jr., K.A. Trott, J.M. Parker, B. Lifland, G. Osterhout, I. Kaattari, K. Reece, W. Vogelbein, C. A. Ottinger
2005, International Journal of Systematic and Evolutionary Microbiology (55) 1139-1147
A group of slowly growing photochromogenic mycobacteria was isolated from Chesapeake Bay striped bass (Morone saxatilis) during an epizootic of mycobacteriosis. Growth characteristics, acid-fastness and 16S rRNA gene sequencing results were consistent with those of the genus Mycobacterium. Biochemical reactions, growth characteristics and mycolic acid profiles (HPLC) resembled those of...
Whither or wither geomicrobiology in the era of 'community metagenomics'
R.S. Oremland, D.G. Capone, J.F. Stolz, J. Fuhrman
2005, Nature Reviews Microbiology (3) 572-578
Molecular techniques are valuable tools that can improve our understanding of the structure of microbial communities. They provide the ability to probe for life in all niches of the biosphere, perhaps even supplanting the need to cultivate microorganisms or to conduct ecophysiological investigations. However, an overemphasis and strict dependence on...
Waveform inversion of volcano-seismic signals assuming possible source geometries
M. Nakano, Hiroyuki Kumagai
2005, Geophysical Research Letters (32) 1-5
We propose an approach to quantify the source of volcano-seismic signals assuming possible source geometries. Such an assumption reduces the number of free parameters in a waveform inversion, so we can quantify the source of these signals observed by a small number of seismic stations. We test this method by...
Arsenic-bearing pyrite and marcasite in the Fire Clay coal bed, Middle Pennsylvanian Breathitt Formation, eastern Kentucky
L.F. Ruppert, J.C. Hower, C.F. Eble
2005, International Journal of Coal Geology (63) 27-35
Arsenic concentrations determined on 11 lithotype samples from the Middle Pennsylvanian Breathitt Group Fire Clay coal bed, Leslie County, KY, range from 1 to 418 ppm (whole coal basis). The 11 lithotype samples, which vary in thickness from 4 to 18 cm, were sampled from a continuous 1.38 m channel...
Sources, bioavailability, and photoreactivity of dissolved organic carbon in the Sacramento-San Joaquin River Delta
R. Stepanauskas, M.A. Moran, B.A. Bergamaschi, J.T. Hollibaugh
2005, Biogeochemistry (74) 131-149
We analyzed bioavailability, photoreactivity, fluorescence, and isotopic composition of dissolved organic carbon (DOC) collected at 13 stations in the Sacramento-San Joaquin River Delta during various seasons to estimate the persistence of DOC from diverse shallow water habitat sources. Prospective large-scale wetland restorations in the Delta may change the amount of...
SHRIMP U-Pb dating of zircon from the Xugou UHP eclogite, Sulu terrane, eastern China
R. Zhao, J. G. Liou, R. Y. Zhang, Joseph L. Wooden
2005, International Geology Review (47) 805-814
clogites, together with garnet clinopyroxenites, occur as lenses within the Xugou garnet peridotite body in the southern Sulu ultrahigh-pressure (UHP) terrane. Combined cathodoluminescence (CL) imaging and SHRIMP U-Pb dating of zircon from two Xugou mafic eclogites provide added constraints on the timing of UHP metamorphism in this area. Zircons from...
Decade of change: a tracking study shows how white-fronted geese responded to recent habitat changes in the Central Valley
Joshua T. Ackerman, John Y. Takekawa, Fleskes, D.L. Orthmeyer
2005, California Waterfowl 16-17, 58
No abstract available at this time...
Life and death on a salt pond: avocets and stilts survive amidst mercury pollution and invasive gulls
Joshua T. Ackerman, C. M. Marn, John Y. Takekawa
2005, Tideline (25) 1-3
No abstract available at this time...
