Amphibian, reptilian, and avian remains from the Fox Hills Formation (Maastrichtian): Shoreline and estuarine deposits of the Pierre Sea in south-central North Dakota
J.W. Hoganson, J.M. Erickson, F.D. Holland Jr.
2007, Special Paper of the Geological Society of America 239-256
Although vertebrate fossils, except for fish, are not common in the Maastrichtian Fox Hills Formation, amphibian, reptilian, and avian remains have been recovered at several localities in south-central North Dakota from shoreline facies of the retreating Pierre-Fox Hills seaway. This mixed fauna of aquatic, terrestrial, and marine taxa provides insight...
Porphyry Cu-Au and associated polymetallic Fe-Cu-Au deposits in the Beiya Area, western Yunnan Province, south China
X.-W. Xu, X.-P. Cai, Q.-B. Xiao, S. G. Peters
2007, Ore Geology Reviews (31) 224-246
The Alkaline porphyries in the Beiya area are located east of the Jinshajiang suture, as part of a Cenozoic alkali-rich porphyry belt in western Yunnan. The main rock types include quartz-albite porphyry, quartz-K-feldspar porphyry and biotite-K-feldspar porphyry. These porphyries are characterised by high alkalinity [(K2O + Na2O)% > 10%], high...
Investigators share improved understanding of the North American carbon cycle
R.A. Birdsey, R. Cook, S. Denning, P. Griffith, B. Law, J. Masek, A. Michalak, S. Ogle, D. Ojima, Y. Pan, C. Sabine, E. Sheffner, E. Sundquist
2007, Conference Paper, Eos
[No abstract available]...
The National Geospatial Program
R.G. Fegeas
2007, Cartography and Geographic Information Science (34) 161-164
No abstract available. ...
Progressive oxidation of pyrite in five bituminous coal samples: An As XANES and 57Fe Mössbauer spectroscopic study
Allan Kolker, Frank E. Huggins
2007, Applied Geochemistry (22) 778-787
Naturally occurring pyrite commonly contains minor substituted metals and metalloids (As, Se, Hg, Cu, Ni, etc.) that can be released to the environment as a result of its weathering. Arsenic, often the most abundant minor constituent in pyrite, is a sensitive monitor of progressive pyrite oxidation in coal. To test...
The geology of the Morro Velho gold deposit in the Archean Rio das Velhas greenstone belt, Quadrilátero Ferrífero, Brazil
Diogenes Scipioni Vial, Ed DeWitt, Lydia Maria Lobato, Charles H. Thorman
2007, Ore Geology Reviews (32) 511-542
The Morro Velho gold deposit, Quadrilátero Ferrífero region, Minas Gerais, Brazil, is hosted by rocks at the base of the Archean Rio das Velhas greenstone belt. The deposit occurs within a thick carbonaceous phyllite package, containing intercalations of felsic and intermediate volcaniclastic rocks and dolomites. Considering the temporal and spatial...
Assessment of contamination from arsenical pesticide use on orchards in the great valley region, Virginia and West Virginia, USA
Gilpin R. Robinson Jr., Peter Larkins, Carol J. Boughton, Bradley W. Reed, Philip L. Sibrell
2007, Journal of Environmental Quality (36) 654-663
Lead arsenate pesticides were widely used in apple orchards from 1925 to 1955. Soils from historic orchards in four counties in Virginia and West Virginia contained elevated concentrations of As and Pb, consistent with an arsenical pesticide source. Arsenic concentrations in approximately 50% of the orchard site soils and approximately...
Effects of intermittent flow and irradiance level on back reef Porites corals at elevated seawater temperatures
L.W. Smith, C. Birkeland
2007, Journal of Experimental Marine Biology and Ecology (341) 282-294
Corals inhabiting shallow back reef habitats are often simultaneously exposed to elevated seawater temperatures and high irradiance levels, conditions known to cause coral bleaching. Water flow in many tropical back reef systems is tidally influenced, resulting in semi-diurnal or diurnal flow patterns. Controlled experiments were conducted to test effects of...
Conditions for coexistence of freshwater mussel species via partitioning of fish host resources
Brenda Rashleigh, D.L. DeAngelis
2007, Ecological Modelling (201) 171-178
Riverine freshwater mussel species can be found in highly diverse communities where many similar species coexist. Mussel species potentially compete for food and space as adults, and for fish host resources during the larval (glochidial) stage. Resource partitioning at the larval stage may promote coexistence. A model of resource utilization...
The Russell gold deposit, Carolina Slate Belt, North Carolina
T. L. Klein, C. G. Cunningham, M.A.V. Logan, R.R. Seal II
2007, Economic Geology (102) 239-256
Gold deposits have been mined in the Carolina slate belt from the early 1800s to recent times, with most of the production from large mines in South Carolina. The Russell mine, one of the larger producers in North Carolina, is located in the central Uwharrie Mountains, and produced over 470...
Possible refugia in the Alexander Archipelago of southeastern Alaska during the late Wisconsin glaciation
P. E. Carrara, T. A. Ager, J.F. Baichtal
2007, Canadian Journal of Earth Sciences (44) 229-244
The interpretation of the extent of late Wisconsin glaciation in southeastern Alaska has varied between geologists and biologists. Maps and reports of the region prepared by geologists commonly indicated that late Wisconsin ice extended as a large uniform front west to the edge of the continental shelf. However, the distribution...
The restricted gemuk group: A triassic to lower cretaceous succession in southwestern Alaska
Marti L. Miller, D. C. Bradley, T. K. Bundtzen, R. B. Blodgett, E.A. Pessagno Jr., R. D. Tucker, A. G. Harris
2007, Special Paper of the Geological Society of America 273-305
New data from an Upper Triassic to Lower Cretaceous deep marine succession-the herein reinstated and restricted Gemuk Group-provide a vital piece of the puzzle for unraveling southwestern Alaska's tectonic history. First defined by Cady et al. in 1955, the Gemuk Group soon became a regional catchall unit that ended up...
A catastrophic meltwater flood event and the formation of the Hudson Shelf Valley
E. Robert Thieler, Bradford Butman, William C. Schwab, Mead A. Allison, Neal W. Driscoll, John P. Donnelly, Elazar Uchupi
2007, Palaeogeography, Palaeoclimatology, Palaeoecology (246) 120-136
The Hudson Shelf Valley (HSV) is the largest physiographic feature on the U.S. mid-Atlantic continental shelf. The 150-km long valley is the submerged extension of the ancestral Hudson River Valley that connects to the Hudson Canyon. Unlike other incised valleys on the mid-Atlantic shelf, it has not been infilled with...
Improving the accuracy of sediment-associated constituent concentrations in whole storm water samples by wet-sieving
W.R. Selbig, R. Bannerman, G. Bowman
2007, Journal of Environmental Quality (36) 226-232
Sand-sized particles (>63 ??m) in whole storm water samples collected from urban runoff have the potential to produce data with substantial bias and/or poor precision both during sample splitting and laboratory analysis. New techniques were evaluated in an effort to overcome some of the limitations associated with sample splitting and...
Evidence of CFC degradation in groundwater under pyrite-oxidizing conditions
L.A. Sebol, W.D. Robertson, Eurybiades Busenberg, Niel Plummer, M.C. Ryan, S.L. Schiff
2007, Journal of Hydrology (347) 1-12
A detailed local-scale monitoring network was used to assess CFC distribution in an unconfined sand aquifer in southwestern Ontario where the zone of 1–5-year-old groundwater was known with certainty because of prior use of a bromide tracer. Groundwater ⩽5 years old was confined to an aerobic zone at ⩽5 m depth and had CFC concentrations...
Exhumation and continental strike-slip fault systems: Introduction
S. M. Roeske, A.B. Till, D.A. Foster, J.C. Sample
2007, Geological Society of America Special Papers vii-x
Metamorphic rocks adjacent to and within strike-slip faultsystems occur in a wide range of tectonic settings. Detailed studies show that for a number of these locales a significant part of the exhumation occurred during strike-slip fault motion, but the specific processes involved are often cryptic. Although some sites share characteristic...
Integrated geologic and geophysical studies of North American continental intraplate seismicity
X. Van Lanen, Walter D. Mooney
2007, Special Paper of the Geological Society of America (425) 101-112
The origin of earthquakes within stable continental regions has been the subject of debate over the past thirty years. Here, we examine the correlation of North American stable continental region earthquakes using five geologic and geophysical data sets: (1) a newly compiled age-province map; (2) Bouguer...
Arsenic, cadmium, lead, and zinc in the Danville and Springfield coal members (Pennsylvanian) from Indiana
Maria Mastalerz, A. Drobniak
2007, International Journal of Coal Geology (71) 37-53
Arsenic, cadmium, lead, and zinc contents and distributions are discussed in two major Pennsylvanian coal beds in Indiana: the Danville Coal Member and the Springfield Coal Member. Arsenic contents of the Danville and Springfield coals show similar ranges from 0.5 to 43??ppm for the Danville Coal and 1 to 50??ppm...
A global organism detection and monitoring system for non-native species
J. Graham, G. Newman, C. Jarnevich, R. Shory, T.J. Stohlgren
2007, Ecological Informatics (2) 177-183
Harmful invasive non-native species are a significant threat to native species and ecosystems, and the costs associated with non-native species in the United States is estimated at over $120 Billion/year. While some local or regional databases exist for some taxonomic groups, there are no effective geographic databases designed to detect...
The role of headwater streams in downstream water quality
R. B. Alexander, E.W. Boyer, R. A. Smith, G. E. Schwarz, R. B. Moore
2007, Journal of the American Water Resources Association (43) 41-59
Knowledge of headwater influences on the water-quality and flow conditions of downstream waters is essential to water-resource management at all governmental levels; this includes recent court decisions on the jurisdiction of the Federal Clean Water Act (CWA) over upland areas that contribute to larger downstream water bodies. We review current...
A regression model to estimate regional ground water recharge
D. L. Lorenz, G. N. Delin
2007, Ground Water (45) 196-208
A regional regression model was developed to estimate the spatial distribution of ground water recharge in subhumid regions. The regional regression recharge (RRR) model was based on a regression of basin-wide estimates of recharge from surface water drainage basins, precipitation, growing degree days (GDD), and average basin specific yield (SY)....
Applications of the JARS method to study levee sites in southern Texas and southern New Mexico
J. Ivanov, R. D. Miller, J. Xia, J.B. Dunbar
2007, Conference Paper, SEG Technical Program Expanded Abstracts
We apply the joint analysis of refractions with surface waves (JARS) method to several sites and compare its results to traditional refraction-tomography methods in efforts of finding a more realistic solution to the inverse refraction-traveltime problem. The JARS method uses a reference model, derived from surface-wave shear-wave velocity estimates, as...
Completion of the 2001 National Land Cover Database for the conterminous United States
Collin G. Homer, Jon Dewitz, Joyce Fry, Michael Coan, N. Hossain, C. Larson, Nate Herold, Alexa McKerrow, J.N. VanDriel, James Wickham
2007, Photogrammetric Engineering and Remote Sensing (73) 337-341
No abstract available....
Factors controlling soil water and stream water aluminum concentrations after a clearcut in a forested watershed with calcium-poor soils
M.R. McHale, Douglas A. Burns, G.B. Lawrence, Peter S. Murdoch
2007, Biogeochemistry (84) 311-331
The 24 ha Dry Creek watershed in the Catskill Mountains of southeastern New York State USA was clearcut during the winter of 1996-1997. The interactions among acidity, nitrate (NO3- ), aluminum (Al), and calcium (Ca2+) in streamwater, soil water, and groundwater were evaluated to determine how they affected the speciation,...
Achieving satellite instrument calibration for climate change
G. Ohring, J. Tansock, W. Emery, J. Butler, L. Flynn, F. Weng, Germain K. St. K., B. Wielicki, C. Cao, M. Goldberg, J. Xiong, G. Fraser, D. Kunkee, D. Winker, L. Miller, S. Ungar, D. Tobin, J.G. Anderson, D. Pollock, S. Shipley, A. Thurgood, G. Kopp, P. Ardanuy, T. Stone
2007, Conference Paper, Eos
[No abstract available]...
