Paleontological interpretations of crater processes and infilling of synimpact sediments from the Chesapeake Bay impact structure
Jean Self-Trail, Lucy E. Edwards, Ronald J. Litwin
2009, Special Paper of the Geological Society of America 633-654
Biostratigraphic analysis of sedimentary breccias and diamictons in the Chesapeake Bay impact structure provides information regarding the timing and processes of late-stage gravitational crater collapse and ocean resurge. Studies of calcareous nannofossil and palynomorph assemblages in the International Continental Scientific Drilling Program (ICDP)-U.S. Geological Survey (USGS) Eyreville A and B...
Supplemental materials for the ICDP-USGS Eyreville A, B, and C core holes, Chesapeake Bay impact structure: Core-box photographs, coring-run tables, and depth-conversion files
C.T. Durand, Lucy E. Edwards, M.L. Malinconico, David S. Powars
2009, Special Paper of the Geological Society of America 115-118
During 2005-2006, the International Continental Scientific Drilling Program and the U.S. Geological Survey drilled three continuous core holes into the Chesapeake Bay impact structure to a total depth of 1766.3 m. A collection of supplemental materials that presents a record of the core recovery and measurement data for the Eyreville...
Deformation of the late Miocene to Pliocene Inyo Surface, eastern Sierra region, California
A. S. Jayko
2009, Special Paper of the Geological Society of America 313-350
A middle and late Miocene erosion surface, the Inyo Surface, underlies late Miocene mafic flows in the White Mountains and late Miocene and (or) early Pliocene flows elsewhere in the eastern Sierra region. The Inyo Surface is correlated with an erosion surface that underlies late Miocene mafic flows in the...
Temperature mediated moose survival in Northeastern Minnesota
M.S. Lenarz, M.E. Nelson, M.W. Schrage, A.J. Edwards
2009, Journal of Wildlife Management (73) 503-510
The earth is in the midst of a pronounced warming trend and temperatures in Minnesota, USA, as elsewhere, are projected to increase. Northern Minnesota represents the southern edge to the circumpolar distribution of moose (Alces alces), a species intolerant of heat. Moose increase their metabolic rate to regulate their core...
Evaluation of airborne lidar data to predict vegetation Presence/Absence
M. Palaseanu-Lovejoy, A. Nayegandhi, J. Brock, R. Woodman, C. W. Wright
2009, Journal of Coastal Research 83-97
This study evaluates the capabilities of the Experimental Advanced Airborne Research Lidar (EAARL) in delineating vegetation assemblages in Jean Lafitte National Park, Louisiana. Five-meter-resolution grids of bare earth, canopy height, canopy-reflection ratio, and height of median energy were derived from EAARL data acquired in September 2006. Ground-truth data were collected...
The effects of varied densities on the growth and emigration of adult cutthroat trout and brook trout in fenced stream enclosures
D.J. Buys, R.H. Hilderbrand, J. L. Kershner
2009, Western North American Naturalist (69) 371-381
We evaluated the effects of various density treatments on adult fish growth and emigration rates between Bonneville cutthroat trout Oncorhynchus clarki utah and brook trout Salvelinus fontinalis in stream enclosures in Beaver Creek, Idaho, We used 3 density treatments (low, ambient, and high fish densities) to evaluate density-related effects and...
Depletion of isoeugenol residues from the fillet tissue of AQUI-S™ exposed rainbow trout (Oncorhynchus mykiss)
Jeffery R. Meinertz, Theresa M. Schreier
2009, Aquaculture (296) 200-206
There is a critical need in U.S. public aquaculture and fishery management for an approved sedative that allows for the immediate release of fish after sedation. AQUI-STM is a fish anesthetic/sedative approved for use in several countries and until recently was being developed in the U.S. as a sedative for immediate...
Geomorphic changes resulting from floods in reconfigured gravel-bed river channels in Colorado, USA
J. G. Elliott, J.P. Capesius
2009, Special Paper of the Geological Society of America 173-198
Geomorphic changes in reconfi gured reaches of three Colorado rivers in response to floods in 2005 provide a benchmark for "restoration" assessment. Sedimententrainment potential is expressed as the ratio of the shear stress from the 2 yr, 5 yr, 10 yr, and 2005 floods to the critical shear stress for...
Fine sediment affects on survival to emergence of robust redhorse
Cecil A. Jennings, E.W. Dilts, J.L. Shelton Jr., Ronald C. Peterson
2009, Environmental Biology of Fishes (87) 43-53
Robust redhorse (Moxostoma robustum) is a rare riverine sucker for which life history information is scarce. Spawning occurs over loose gravel substrate and eggs and larvae may be adversely affected by fine sediments among the gravel. A 2-year study was conducted to determine the threshold at which fine sediments are...
Age, geochemical composition, and distribution of Oligocene ignimbrites in the northern Sierra Nevada, California: Implications for landscape morphology, elevation, and drainage divide geography of the Nevadaplano
Elizabeth J. Cassel, Andrew T. Calvert, Stephan A. Graham
2009, International Geology Review (51) 723-742
To gain a better understanding of the topographic and landscape evolution of the Cenozoic Sierra Nevada and Basin and Range, we combine geochemical and isotopic age correlations with palaeoaltimetry data from widely distributed ignimbrites in the northern Sierra Nevada, California. A sequence of Oligocene rhyolitic ignimbrites is preserved across the...
Provenance and palaeogeographic implications of Eocene-Oligocene sedimentary rocks in the northwestern Basin and Range
A.E. Egger, J.P. Colgan, C. York
2009, International Geology Review (51) 900-919
A thick sequence of uppermost Eocene to lower Oligocene volcaniclastic and sedimentary rocks is exposed at the base of the Warner Range in northeastern California. This isolated exposure provides insight into the palaeogeographic setting of the northwestern Basin and Range during this time period. Significant thinning of the unit over...
High-resolution seismic-reflection images across the ICDP-USGS Eyreville deep drilling site, Chesapeake Bay impact structure
David S. Powars, Rufus D. Catchings, Mark R. Goldman, Gregory Gohn, J. Wright Horton, Jr., Lucy E. Edwards, Michael J. Rymer, G. Gandhok
2009, Special Paper of the Geological Society of America 209-233
The U.S. Geological Survey (USGS) acquired two 1.4-km-long, high-resolution (~5 m vertical resolution) seismic-reflection lines in 2006 that cross near the International Continental Scientific Drilling Program (ICDP)–USGS Eyreville deep drilling site located above the late Eocene...
The 16th International Geological Congress, Washington, 1933
C.M. Nelson
2009, Episodes (32) 33-40
In 1933, the International Geological Congress (IGC) returned to the United States of America (USA) for its sixteenth meeting, forty-two years after the 5th IGC convened in Washington. The Geological Society of America and the U.S. Geological Survey (USGS) supplied the major part of the required extra-registration funding after the...
Rupture imaging of the Mw 7.9 12 May 2008 Wenchuan earthquake from back projection of teleseismic P waves
Y. Xu, K.D. Koper, O. Sufri, L. Zhu, Alexander R. Hutko
2009, Geochemistry, Geophysics, Geosystems (10)
[1] The Mw 7.9 Wenchuan earthquake of 12 May 2008 was the most destructive Chinese earthquake since the 1976 Tangshan event. Tens of thousands of people were killed, hundreds of thousands were injured, and millions were left homeless. Here we infer the detailed rupture process of the Wenchuan earthquake by...
Characteristics of organic soil in black spruce forests: Implications for the application of land surface and ecosystem models in cold regions
S. Yi, K. Manies, J. Harden, A. D. McGuire
2009, Geophysical Research Letters (36)
Soil organic layers (OL) play an important role in landatmosphere exchanges of water, energy and carbon in cold environments. The proper implementation of OL in land surface and ecosystem models is important for predicting dynamic responses to climate warming. Based on the analysis of OL samples of black spruce (Picea...
Anomalous dispersion due to hydrocarbons: The secret of reservoir geophysics?
R.L. Brown
2009, Leading Edge (Tulsa, OK) (28) 420-425
When P- and S-waves travel through porous sandstone saturated with hydrocarbons, a bit of magic happens to make the velocities of these waves more frequency-dependent (dispersive) than when the formation is saturated with brine. This article explores the utility of the anomalous dispersion in finding more oil and gas, as...
Dreissenid mussels from the Great Lakes contain elevated thiaminase activity
D. E. Tillitt, S.C. Riley, A.N. Evans, S. J. Nichols, J.L. Zajicek, J. Rinchard, C.A. Richter, C.C. Krueger
2009, Journal of Great Lakes Research (35) 309-312
We examined thiaminase activity in dreissenid mussels collected at different depths and seasons, and from various locations in Lakes Michigan, Ontario, and Huron. Here we present evidence that two dreissenid mussel species (Dreissena bugensis and D. polymorpha) contain thiaminase activity that is 5-100 fold greater than observed in Great Lakes...
Stream-network navigation in the U.S. Geological Survey stream stats web application
K. G. Ries, P. A. Steeves, J. D. Guthrie, A. H. Rea, D. W. Stewart
2009, Conference Paper, Proceedings of the international conference on advanced geographic information systems and web services, GEOWS 2009
StreamStats is a U.S. Geological Survey Web-based geographic information systems application developed as a tool for water-resources planning and management, engineering design, and other applications. The primary functionality of StreamStats allows users to obtain drainage-basin boundaries, basin characteristics, and streamflow statistics for gaged and ungaged sites. Recently, tools that allow...
Nonexplosive and explosive magma/wet-sediment interaction during emplacement of Eocene intrusions into Cretaceous to Eocene strata, Trans-Pecos igneous province, West Texas
K.S. Befus, R.E. Hanson, D. P. Miggins, J.A. Breyer, A.B. Busbey
2009, Journal of Volcanology and Geothermal Research (181) 155-172
Eocene intrusion of alkaline basaltic to trachyandesitic magmas into unlithified, Upper Cretaceous (Maastrichtian) to Eocene fluvial strata in part of the Trans-Pecos igneous province in West Texas produced an array of features recording both nonexplosive and explosive magma/wet-sediment interaction. Intrusive complexes with 40Ar/39Ar dates of ~ 47-46??Ma consist of coherent...
HRSC: High resolution stereo camera
G. Neukum, R. Jaumann, A.T. Basilevsky, A. Dumke, S. Van Gasselt, B. Giese, E. Hauber, J. W. Head III, C. Heipke, N. Hoekzema, H. Hoffmann, R. Greeley, K. Gwinner, R. Kirk, W. Markiewicz, T. B. McCord, G. Michael, Jan-Peter Muller, J.B. Murray, J. Oberst, P. Pinet, R. Pischel, T. Roatsch, F. Scholten, K. Willner
2009, Conference Paper, European Space Agency, (Special Publication) ESA SP
The High Resolution Stereo Camera (HRSC) on Mars Express has delivered a wealth of image data, amounting to over 2.5 TB from the start of the mapping phase in January 2004 to September 2008. In that time, more than a third of Mars was covered at a resolution of 10-20...
Reflectance spectroscopy of organic compounds: 1. Alkanes
R. N. Clark, J. M. Curchin, T.M. Hoefen, G.A. Swayze
2009, Journal of Geophysical Research E: Planets (114)
Reflectance spectra of the organic compounds comprising the alkane series are presented from the ultraviolet to midinfrared, 0.35 to 15.5 /??m. Alkanes are hydrocarbon molecules containing only single carbon-carbon bonds, and are found naturally on the Earth and in the atmospheres of the giant planets and Saturn's moon, Titan. This...
Trout density and health in a stream with variable water temperatures and trace element concentrations: does a cold-water source attract trout to increased metal exposure?
D.D. Harper, A.M. Farag, C. Hogstr, Elizabeth MacConnell
2009, Environmental Toxicology and Chemistry (28) 800-808
A history of hard-rock mining has resulted in elevated concentrations of heavy metals in Prickly Pear Creek (MT. USA). Remediation has improved water quality; however, dissolved zinc and cadmium concentrations still exceed U.S. Environmental Protection Agency water-quality criteria. Physical habitat, salmonid density, fish health, and water quality were assessed, and...
A Holocene record of climate-driven shifts in coastal carbon sequestration
Siddhartha Mitra, A.R. Zimmerman, G.B. Hunsinger, D. Willard, J.C. Dunn
2009, Geophysical Research Letters (36)
A sediment core collected in the mesohaline portion of Chesapeake Bay was found to contain periods of increased delivery of refractory black carbon (BC) and polycyclic aromatic hydrocarbons (PAHs). The BC was most likely produced by biomass combustion during four centennialscale dry periods as indicated by the Palmer Drought Severity...
Mercury cycling in stream ecosystems. 2. Benthic methylmercury production and bed sediment - Pore water partitioning
Mark Marvin-DiPasquale, Michelle A. Lutz, Mark E. Brigham, David P. Krabbenhoft, George R. Aiken, William H. Orem, Britt D. Hall
2009, Environmental Science & Technology (43) 2726-2732
Mercury speciation, controls on methylmercury (MeHg) production, and bed sediment−pore water partitioning of total Hg (THg) and MeHg were examined in bed sediment from eight geochemically diverse streams where atmospheric deposition was the predominant Hg input. Across all streams, sediment THg concentrations were best described as a combined function of...
Biogeochemistry at a wetland sediment-alluvial aquifer interface in a landfill leachate plume
M.M. Lorah, I.M. Cozzarelli, J.K. Böhlke
2009, Journal of Contaminant Hydrology (105) 99-117
The biogeochemistry at the interface between sediments in a seasonally ponded wetland (slough) and an alluvial aquifer contaminated with landfill leachate was investigated to evaluate factors that can effect natural attenuation of landfill leachate contaminants in areas of groundwater/surface-water interaction. The biogeochemistry at the wetland-alluvial aquifer interface differed greatly between...
