A cool eastern Pacific Ocean at the close of the Last Interglacial complex
D.R. Muhs, K. R. Simmons, G. L. Kennedy, K.R. Ludwig, L.T. Groves
2006, Conference Paper, Quaternary Science Reviews
New high-precision thermal ionization mass-spectrometric (TIMS) U-series ages of solitary corals (Balanophyllia elegans) from several marine terrace localities along the California and southern Oregon coasts date to the ???80,000 yr BP high stand of sea, correlative with marine isotope substage 5a, late in the last interglacial complex. Ages of multiple...
Summer food habits and trophic overlap of roundtail chub and creek chub in Muddy Creek, Wyoming
M.C. Quist, M.R. Bower, W.A. Hubert
2006, Southwestern Naturalist (51) 22-27
Native fishes of the Upper Colorado River Basin have experienced substantial declines in abundance and distribution, and are extirpated from most of Wyoming. Muddy Creek, in south-central Wyoming (Little Snake River watershed), contains sympatric populations of native roundtail chub (Gila robusta), bluehead sucker, (Catostomus discobolus), and flannelmouth sucker (C. tatipinnis),...
Extracting the building response using seismic interferometry: Theory and application to the Millikan Library in Pasadena, California
R. Snieder, E. Safak
2006, Bulletin of the Seismological Society of America (96) 586-598
The motion of a building depends on the excitation, the coupling of the building to the ground, and the mechanical properties of the building. We separate the building response from the excitation and the ground coupling by deconvolving the motion recorded at different levels in the building and apply this...
Solute sources in stream water during consecutive fall storms in a northern hardwood forest watershed: A combined hydrological, chemical and isotopic approach
M.J. Mitchell, K.B. Piatek, S. Christopher, B. Mayer, C. Kendall, P. McHale
2006, Biogeochemistry (78) 217-246
Understanding the effects of climate change including precipitation patterns has important implications for evaluating the biogeochemical responses of watersheds. We focused on four storms in late summer and early fall that occurred after an exceptionally dry period in 2002. We analyzed not only the influence of these storms on...
Simple equations guide high-frequency surface-wave investigation techniques
J. Xia, Y. Xu, C. Chen, R.D. Kaufmann, Y. Luo
2006, Soil Dynamics and Earthquake Engineering (26) 395-403
We discuss five useful equations related to high-frequency surface-wave techniques and their implications in practice. These equations are theoretical results from published literature regarding source selection, data-acquisition parameters, resolution of a dispersion curve image in the frequency-velocity domain, and the cut-off frequency of high modes. The first equation suggests Rayleigh...
Surface waves in the western Taiwan coastal plain from an aftershock of the 1999 Chi-Chi, Taiwan, earthquake
G.-Q. Wang, G.-Q. Tang, D.M. Boore, Burbach G. Van Ness G., C.R. Jackson, X.-Y. Zhou, Q.-L. Lin
2006, Bulletin of the Seismological Society of America (96) 821-845
Significant surface waves were recorded in the western coastal plain (WCP) of Taiwan during the 1999 Chi-Chi, Taiwan, earthquake and its series of aftershocks. We study in detail the surface waves produced by one aftershock (20 September 1999, 18hr 03m 41.16sec, M 6.2) in this paper. We take the Chelungpu-Chukou...
Bacterial biomarkers thermally released from dissolved organic matter
P.F. Greenwood, J.A. Leenheer, C. McIntyre, L. Berwick, P.D. Franzmann
2006, Organic Geochemistry (37) 597-609
Hopane biomarker products were detected using microscale sealed vessel (MSSV) pyrolysis gas chromatography-mass spectrometry (GC-MS) analysis of dissolved organic matter from natural aquatic systems colonised by bacterial populations. MSSV pyrolysis can reduce the polyhydroxylated alkyl side chain of bacteriohopanepolyols, yielding saturated hopane products which are more amenable to GC-MS detection...
Population dynamics of zebra mussels Dreissena polymorpha (Pallas, 1771) during the initial invasion of the Upper Mississippi River, USA
W.G. Cope, M.R. Bartsch, J.E. Hightower
2006, Journal of Molluscan Studies (72) 179-188
The aim of this study was to document and model the population dynamics of zebra mussels Dreissena polymorpha (Pallas, 1771) in Pool 8 of the Upper Mississippi River (UMR), USA, for five consecutive years (1992-1996) following their initial discovery in September 1991. Artificial substrates (concrete blocks, 0.49 m2 surface area)...
Fat dynamics of arctic-nesting sandpipers during spring in mid-continental North America
Gary L. Krapu, J.L. Eldridge, C. L. Gratto-Trevor, D. A. Buhl
2006, The Auk (123) 323-334
We measured fresh body mass, total body fat, and fat-free dry mass (FFDM) of three species of Arctic-nesting calidrid sandpipers (Baird's Sandpiper [Calidris bairdii], hereafter “BASA”; Semipalmated Sandpiper [C. pusilla], hereafter “SESA”; and White-rumped Sandpiper [C. fuscicollis], hereafter “WRSA”) during spring stopovers in the Prairie Pothole Region (PPR) of North...
Kaolin
R.L. Virta
2006, Mining Engineering (58) 40-41
In 2005, 22 companies mined kaolin in nine US states. Production in Georgia declined to 6.19 Mt down from 6.78 Mt in 2004. Despite the decline, Georgia remained the leading producer state followed by Alabama, South Carolina, Arkansas, Texas, Nevada, California, North Carolina and Florida. In the next year or...
A shock-induced polymorph of anatase and rutile from the Chesapeake Bay impact structure, Virginia, U.S.A
J.C. Jackson, J. Wright Horton Jr., I.-M. Chou, H. E. Belkin
2006, American Mineralogist (91) 604-608
A shock-induced polymorph (TiO2II) of anatase and rutile has been identified in breccias from the late Eocene Chesapeake Bay impact structure. The breccia samples are from a recent, partially cored test hole in the central uplift at Cape Charles, Virginia. The drill cores from 744 to 823 m depth consist...
Risk of Myxobolus cerebralis infection to rainbow trout in the Madison River, Montana, USA
R.C. Krueger, B.L. Kerans, E.R. Vincent, C. Rasmussen
2006, Ecological Applications (16) 770-783
Myxobolus cerebralis, the parasite that causes salmonid whirling disease, has had detrimental effects on several salmonid populations in the Intermountain West, including the rainbow trout in the Madison River, Montana, USA. The goal of this study was to examine relationships among characteristics of the environment, Tubifex tubifex (the alternate host)...
Bobcat attack on a cottontail rabbit
E. Biggins, D.M. Biggins
2006, Southwestern Naturalist (51) 119-122
We observed an attack by a bobcat (Lynx rufus) on a cottontail rabbit (Sylvilagus) that involved stealthy approach by the cat for >1 h, followed by a 12.3-s chase covering 116.0 m for the cat and 128.4 m for the rabbit. During the chase, the route of the cat from...
Necropsy findings in American alligator late-stage embryos and hatchlings from northcentral Florida lakes contaminated with organochlorine pesticides
M. S. Sepulveda, Piero F. Del, J.J. Wiebe, H.R. Rauschenberger, T. S. Gross
2006, Journal of Wildlife Diseases (42) 56-73
Increased American alligator (Alligator mississippiensis) embryo and neonatal mortality has been reported from several northcentral Florida lakes contaminated with old-use organochlorine pesticides (OCPs). However, a clear relationship among these contaminants and egg viability has not been established, suggesting the involvement of additional factors in these mortalities. Thus, the main objective...
Sediment and nutrient accumulation within lowland bottomland ecosystems: An example from the Atchafalaya River Basin, Louisiana
C.R. Hupp, G.B. Noe
2006, Conference Paper, Hydrology and Management of Forested Wetlands - Proceeding of the International Conference
Sediment and nutrient deposition, storage, and transformations are important environmental functions of riverine forested wetland ecosystems, yet documentation and interpretation of sedimentation/nutrient processes remain incomplete. Our studies located in the Coastal Plain of southeastern USA, including the Atchafalaya Basin, La. (a distributary of the Mississippi River) serve as example for...
Oink if you love coal
E. R. Landa
2006, Geotimes (51) 60
No abstract available....
Evidence for preferential flow through sandstone aquifers in Southern Wisconsin
S.K. Swanson, J.M. Bahr, K. R. Bradbury, K.M. Anderson
2006, Sedimentary Geology (184) 331-342
Sandstones often escape extensive hydrogeologic characterization due to their high primary porosity and perceived homogeneity of permeability. This study provides evidence for laterally extensive, high permeability zones in the Tunnel City Group, an undeformed, Cambrian-aged sandstone unit that exists in the subsurface throughout much of central and southern Wisconsin, USA....
A discovery of extremely-enriched boehmite from coal in the Junger Coalfield, the northeastern Ordos Basin
S. Dai, D. Ren, S. Li, C. Chou
2006, Acta Geologica Sinica (80) 294-300
The authors found an extremely-enriched boehmite and its associated minerals for the first time in the super-thick No. 6 coal seam from the Junger Coalfield in the northeastern Ordos Basin by using technologies including the X-ray diffraction analysis (XRD), scanning electron microscope equipped with an energy dispersive X-ray spectrometer, and...
Characterization of unsaturated zone hydrogeologic units using matrix properties and depositional history in a complex volcanic environment
Lorraine E. Flint, David C. Buesch, Alan L. Flint
2006, Vadose Zone Journal (5) 480-492
Characterization of the physical and unsaturated hydrologic properties of subsurface materials is necessary to calculate flow and transport for land use practices and to evaluate subsurface processes such as perched water or lateral diversion of water, which are influenced by features such as faults, fractures, and abrupt changes in lithology....
Alpersite (Mg,Cu)SO4·7H2O, a new mineral of the melanterite group, and cuprian pentahydrite: Their occurrence within mine waste
Ronald C. Peterson, Jane M. Hammarstrom, Robert R. Seal II
2006, American Mineralogist (91) 261-269
Alpersite, Mg0.58Cu0.37Zn0.02Mn0.02Fe0.01SO4·7H2O, a new mineral species with direct relevance to reactions in mine waste, occurs in a mineralogically zoned assemblage in sheltered areas at the abandoned Big Mike mine in central Nevada at a relative humidity of 65% and T = 4 °C. Blue alpersite, which is isostructural with melanterite (FeSO4·7H2O),...
Predicting water-surface fluctuation of continental lakes: A RS and GIS based approach in Central Mexico
M.E. Mendoza, G. Bocco, M. Bravo, Granados E. Lopez, W. R. Osterkamp
2006, Water Resources Management (20) 291-311
Changes in the water-surface area occupied by the Cuitzeo Lake, Mexico, during the 1974-2001 period are analysed in this study. The research is based on remote sensing and geographic information techniques, as well as statistical analysis. High-resolution satellite image data were used to analyse the 1974-2000 period, and very low-resolution...
Coal geochemistry in the service of archaeology
C.A. Palmer, R. B. Finkelman
2006, International Journal of Coal Geology (66) 151-152
[No abstract available]...
USGS National Wildlife Health Center's Quarterly Wildlife Mortality Report
K. A. Converse, R. Sohn, G. McLaughlin
2006, Supplement to the Journal of Wildlife Diseases (42)
Geophysical monitoring of a field-scale biostimulation pilot project
J.W. Lane Jr., F. D. Day-Lewis, C.C. Casey
2006, Ground Water (44) 430-443
The USGS conducted a geophysical investigation in support of a U.S. Naval Facilities Engineering Command, Southern Division field‐scale biostimulation pilot project at Anoka County Riverfront Park (ACP), downgradient of the Naval Industrial Reserve Ordnance Plant, Fridley, Minnesota. The goal of the pilot project is to evaluate...
Comparative performance of fixed-film biological filters: Application of reactor theory
B.J. Watten, P.L. Sibrell
2006, Aquacultural Engineering (34) 198-213
Nitrification is classified as a two-step consecutive reaction where R1 represents the rate of formation of the intermediate product NO2-N and R2 represents the rate of formation of the final product NO3-N. The relative rates of R1 and R2 are influenced by reactor type characterized hydraulically as plug-flow, plug-flow with...
