Carbon dioxide and methane sorption in high volatile bituminous coals from Indiana, USA
Maria Mastalerz, Harold J. Gluskoter, J. Rupp
2004, International Journal of Coal Geology (60) 43-55
Samples of coals from several coalbeds in Indiana were analyzed for CO2 and CH4 sorption capacity using a high-pressure adsorption isotherm technique. Coal quality and petrographic composition of the coals were determined to study their relationships to the volume of CO2 and CH4 that could be sorbed into the coal....
Textural, compositional, and sulfur isotope variations of sulfide minerals in the Red Dog Zn-Pb-Ag deposits, Brooks Range, Alaska: Implications for Ore Formation
K.D. Kelley, D. L. Leach, C. A. Johnson, J.L. Clark, M. Fayek, J. F. Slack, V.M. Anderson, R. A. Ayuso, W.I. Ridley
2004, Economic Geology (99) 1509-1532
The Red Dog Zn-Pb deposits are hosted in organic-rich mudstone and shale of the Mississippian Kuna Formation. A complex mineralization history is defined by four sphalerite types or stages: (1) early brown sphalerite, (2) yellow-brown sphalerite, (3) red-brown sphalerite, and (4) late tan sphalerite. Stages 2 and 3 constitute the...
Use of qualitative and quantitative information in neural networks for assessing agricultural chemical contamination of domestic wells
A. Mishra, C. Ray, D.W. Kolpin
2004, Journal of Hydrologic Engineering (9) 502-511
A neural network analysis of agrichemical occurrence in groundwater was conducted using data from a pilot study of 192 small-diameter drilled and driven wells and 115 dug and bored wells in Illinois, a regional reconnaissance network of 303 wells across 12 Midwestern states, and a study of 687 domestic wells...
Radiated energy and the rupture process of the Denali fault earthquake sequence of 2002 from broadband teleseismic body waves
G. L. Choy, J. Boatwright
2004, Bulletin of the Seismological Society of America (94) S269-S277
Displacement, velocity, and velocity-squared records of P and SH body waves recorded at teleseismic distances are analyzed to determine the rupture characteristics of the Denali fault, Alaska, earthquake of 3 November 2002 (MW 7.9, Me 8.1). Three episodes of rupture can be identified from broadband (∼0.1–5.0 Hz) waveforms. The Denali fault earthquake started...
Effects of housing density and cage floor space on C57BL/6J mice
A. L. Smith, S.L. Mabus, J.D. Stockwell, C. Muir
2004, Comparative Medicine (54) 656-663
The Guide for the Care and Use of Laboratory Animals (the Guide) is widely accepted as the housing standard by most Institutional Animal Care and Use Committees. The recommendations are based on best professional judgment rather than experimental data. Current efforts are directed toward replacing these guidelines with data-driven, species-appropriate...
Delineation and evaluation of hydrologic-landscape regions in the United States using geographic information system tools and multivariate statistical analyses.
David M. Wolock, Thomas C. Winter, Gerard McMahon
2004, Environmental Management (34) S71-S88
Hydrologic-landscape regions in the United States were delineated by using geographic information system (GIS) tools combined with principal components and cluster analyses. The GIS and statistical analyses were applied to land-surface form, geologic texture (permeability of the soil and bedrock), and climate variables that describe the physical and climatic setting...
DEM generation and tidal deformation detection for Sulzberger Ice Shelf, West Antarctica using SAR interferometry
S. Baek, Oh-Ig Kwoun, M. Bassler, Z. Lu, C. K. Shum, R. Dietrich
2004, Conference Paper, Proceedings of the 60th annual meeting of the Institute of Navigation
In this study we generated a relative Digital Elevation Model (DEM) over the Sulzberger Ice Shelf, West Antarctica using ERS1/2 synthetic aperture radar (SAR) interferometry data. Four repeat pass differential interferograms are used to find the grounding zone and to classify the study area. An interferometrically derived DEM is compared...
Myxobolus cerebralis internal transcribed spacer 1 (ITS-1) sequences support recent spread of the parasite to North America and within Europe
Christopher M. Whipps, M. El-Matbouli, R.P. Hedrick, V. Blazer, M.L. Kent
2004, Diseases of Aquatic Organisms (60) 105-108
Molecular approaches for resolving relationships among the Myxozoa have relied mainly on small subunit (SSU) ribosomal DNA (rDNA) sequence analysis. This region of the gene is generally used for higher phylogenetic studies, and the conservative nature of this gene may make it inadequate for intraspecific comparisons. Previous intraspecific studies of Myxobolus...
Accuracy of a pulse-coherent acoustic Doppler profiler in a wave-dominated flow
J.R. Lacy, C. R. Sherwood
2004, Journal of Atmospheric and Oceanic Technology (21) 1448-1461
The accuracy of velocities measured by a pulse-coherent acoustic Doppler profiler (PCADP) in the bottom boundary layer of a wave-dominated inner-shelf environment is evaluated. The downward-looking PCADP measured velocities in eight 10-cm cells at 1 Hz. Velocities measured by the PCADP are compared to those measured by an acoustic Doppler...
Late Albian dinosaur tracks from the cratonic (eastern) margin of the Western Interior Seaway, Nebraska, USA
R. M. Joeckel, J.M. Cunningham, R.G. Corner, G.W. Brown, P.L. Phillips, Greg A. Ludvigson
2004, Ichnos: An International Journal for Plant and Animal Traces (11) 275-284
At least 22 tridactyl dinosaur tracks, poorly preserved in various degrees of expression, have recently been found at an exposure in the Dakota Formation (Lower Cretaceous, Albian) in Jefferson County, Nebraska. These tracks generally have broad, blunt digits and a broad posterior margin. The largest of the tracks measures 57...
A new dinosaur ichnotaxon from the Lower Cretaceous Patuxent Formation of Maryland and Virginia
Ray Stanford, Robert E. Weems, Martin G. Lockley
2004, Ichnos: An International Journal for Plant and Animal Traces (11) 251-259
In recent years, numerous dinosaur footprints have been discovered on bedding surfaces within the Lower Cretaceous Patuxent Formation of Maryland and Virginia. Among these, distinctive small tracks that display a combination of small manus with five digit impressions and a relatively much larger pes with four toe impressions evidently were...
Overland flow generation in two lithologically distinct rainforest catchments
S. Godsey, H. Elsenbeer, R. Stallard
2004, Journal of Hydrology (295) 276-290
Streams on uniformly rainforest-covered, but lithologically very diverse Barro Colorado Island in central Panama?? show remarkable differences in their runoff response to rainfall. This lithological diversity is reflected in equally diverse soilscapes, and our objective was to test the hypothesis that contrasting runoff responses derive from soilscape features that control...
Borehole petrophysical chemostratigraphy of Pennsylvanian black shales in the Kansas subsurface
J.H. Doveton, D. F. Merriam
2004, Chemical Geology (206) 249-258
Pennsylvanian black shales in Kansas have been studied on outcrop for decades as the core unit of the classic Midcontinent cyclothem. These shales appear to be highstand condensed sections in the sequence stratigraphic paradigm. Nuclear log suites provide several petrophysical measurements of rock chemistry that are a useful data source...
Are big basins just the sum of small catchments?
J. Shaman, M. Stieglitz, D. Burns
2004, Hydrological Processes (18) 3195-3206
Many challenges remain in extending our understanding of how hydrologic processes within small catchments scale to larger river basins. In this study we examine how low-flow runoff varies as a function of basin scale at 11 catchments, many of which are nested, in the 176 km2 Neversink River watershed in...
Stable isotopic constraints on fluid-rock interaction and Cu-PGE-S redistribution in the Sonju Lake intrusion, Minnesota
Y.-R. Park, E.M. Ripley, J.D. Miller Jr., C. Li, J. Mariga, P. Shafer
2004, Economic Geology (99) 325-338
The Sonju Lake intrusion, part of the 1.1 Ga Midcontinent rift-related Beaver Bay Complex, is a 1,200-m-thick, strongly differentiated, layered sequence of mafic cumulates located in northeastern Minnesota. Basal melatroctolite and dunite layers are overlain by troctolite, gabbro, Fe-Ti oxide-rich gabbro, apatite diorite, and monzodiorite. Stratigraphic intervals rich in Pt...
First record of Graphoderus liberus (Coleoptera: Dytiscidae) in North Dakota
B.A. Hanson, N.H. Euliss Jr., D.M. Mushet
2004, Prairie Naturalist (36) 67-69
No abstract available....
Sampling and monitoring for closure
V. T. McLemore, C.C. Russell, K. S. Smith
2004, Conference Paper, 2004 SME Annual Meeting Preprints
The Metals Mining Sector of the Acid Drainage Technology Initiative (ADTI-MMS) addresses technical drainage-quality issues related to metal mining and related metallurgical operations, for future and active mines, as well as, for historical mines and mining districts. One of the first projects of ADTI-MMS is to develop a handbook describing...
VOCs in shallow groundwater in new residential/commercial areas of the United States
P. J. Squillace, M.J. Moran, C. V. Price
2004, Environmental Science & Technology (38) 5327-5338
The quality of shallow groundwater in urban areas was investigated by sampling 518 monitoring wells between 1996 and 2002 as part of the National Water-Quality Assessment Program of the U.S. Geological Survey. Well networks were installed primarily in new residential/commercial areas less than about 30 years old (17 studies) and...
Changes in plant functional groups, litter quality, and soil carbon and nitrogen mineralization with sheep grazing in an Inner Mongolian Grassland
N.N. Barger, D.S. Ojima, J. Belnap, W. Shiping, W. Yanfen, Z. Chen
2004, Journal of Range Management (57) 613-619
This study reports on changes in plant functional group composition, litter quality, and soil C and N mineralization dynamics from a 9-year sheep grazing study in Inner Mongolia. Addressed are these questions: 1) How does increasing grazing intensity affect plant community composition? 2) How does increasing grazing intensity alter soil...
Remediation of spilled petroleum hydrocarbons by in situ landfarming at an arctic site
K. McCarthy, L. Walker, L. Vigoren, J. Bartel
2004, Cold Regions Science and Technology (39) 31-39
A simple, economical landfarming operation was implemented to treat 3600 m3 of soil at a site just northeast of Barrow, AK (latitude 71.3 ??N). Prior to landfarming, diesel-range organics (DRO) and trimethylbenzenes (TMB) were present in the soil at concentrations more than an order of magnitude greater than the established...
Mechanisms for dominance in an early successional old field by the invasive non-native Lespedeza cuneata (Dum. Cours.) G. Don
A.L. Brandon, D.J. Gibson, B.A. Middleton
2004, Biological Invasions (6) 483-493
Researchers studying invasive plants often concentrate their efforts on predictive models thought to allow invasive plants to dominate native landscapes. However, if an invasive is already well established then experimental research is necessary to provide the information necessary to effectively manage the species. Prescribing appropriate management strategies without prior experimental...
Frequency spectral analysis of GPR data over a crude oil spill
B.L. Burton, G.R. Olhoeft, M.H. Powers
Slob E.Yarovoy A.Rhebergen J.B., editor(s)
2004, Conference Paper, Proceedings of the Tenth International Conference Ground Penetrating Radar, GPR 2004
A multi-offset ground penetrating radar (GPR) dataset was acquired by the U.S. Geological Survey (USGS) at a crude oil spill site near Bemidji, Minnesota, USA. The dataset consists of two, parallel profiles, each with 17 transmitter-receiver offsets ranging from 0.60 to 5.15m. One profile was acquired over a known oil...
Evaluating the source of streamwater nitrate using δ15N and δ18O in nitrate in two watersheds in New Hampshire, USA
Linda H. Pardo, Carol Kendall, Jennifer Pett-Ridge, Cecily C.Y. Chang
2004, Hydrological Processes (18) 2699-2712
The natural abundance of nitrogen and oxygen isotopes in nitrate can be a powerful tool for identifying the source of nitrate in streamwater in forested watersheds, because the two main sources of nitrate, atmospheric deposition and microbial nitrification, have distinct δ18O values. Using a simple mixing model, we estimated the...
Dinosaur tracks from the Cedar Mountain Formation (Lower Cretaceous), Arches National Park, Utah
Martin G. Lockley, Diane K. White, James I. Kirkland, Vincent L. Santucci
2004, Ichnos: An International Journal for Plant and Animal Traces (11) 285-293
The seventh and largest known dinosaur tracksite from the Cedar Mountain Formation is reported from two important stratigraphic levels in the Ruby Ranch Member within the boundaries of Arches National Park. Previous reports of sites with a few isolated tracks are of limited utility in indicating the fauna represented by...
Imaging the source region of the 2003 San Simeon earthquake within the weak Franciscan subduction complex, central California
E. Hauksson, D. Oppenheimer, T.M. Brocher
2004, Geophysical Research Letters (31)
Data collected from the 2003 Mw6.5 San Simeon earthquake sequence in central California and a 1986 seismic refraction experiment demonstrate that the weak Franciscan subduction complex suffered brittle failure in a region without significant velocity contrast across a slip plane. Relocated hypocenters suggest a spatial relationship between the seismicity and...
