M.G. Mesa, H.E. Christiansen
2011, Report
No abstract available ...
Search Results
184617 results.
Alternate formats: RIS file of the first 3000 search results | Download all results as CSV | TSV | Excel | RSS feed based on this search | JSON version of this page of results
Page 1836, results 45876 - 45900
Publication Extents
Not all publications have extents, not all extents are completely accurateHolly S. Godsey, Charles G. Oviatt, David M. Miller, Marjorie A. Chan
2011, Palaeogeography, Palaeoclimatology, Palaeoecology (310) 442-450
Stratigraphic descriptions and radiocarbon data from eleven field locations are presented in this paper to establish a chronostratigraphic framework for offshore to nearshore deposits of Lake Bonneville. Based on key marker beds and geomorphic position, the deposits are interpreted to have accumulated during the period from the late transgressive phase,...
Lee Slater, Dimitrios Ntarlagiannis, Estella Atekwana, Farag Mewafy, Andre Revil, Magnus Skold, Yuri Gorby, Frederick D. Day-Lewis, John W. Lane Jr., Dale D. Werkema, Jared J. Trost, Geoffrey N. Delin, William N. Herkelrath
H.V. Rectanus, R. Sirabian, editor(s)
2011, Conference Paper, Proceedings of the first international symposium on bioremediation and sustainable environmental technologies
We conducted electrical geophysical measurements at the National Crude Oil Spill Fate and Natural Attenuation Research Site (Bemidji, MN). Borehole and surface self-potential measurements do not show evidence for the existence of a biogeobattery mechanism in response to the redox gradient resulting from biodegradation of oil. The relatively small self...
J.E. Bromberg, S. Kumar, C. S. Brown, T.J. Stohlgren
2011, Invasive Plant Science and Management (4) 173-182
Downy brome (Bromus tectorum L.), an invasive winter annual grass, may be increasing in extent and abundance at high elevations in the western United States. This would pose a great threat to high-elevation plant communities and resources. However, data to track this species in high-elevation environments are limited. To address...
C. Hopkinson, N. Crasto, P. Marsh, D. Forbes, L. Lesack
2011, Hydrological Processes (25) 2995-3011
Airborne light detection and ranging (LiDAR) data were used to map water level (WL) and hydraulic gradients (δH/δx) in the Mackenzie Delta. The LiDAR WL data were validated against eight independent hydrometric gauge measurements and demonstrated mean offsets from − 0·22 to + 0·04 m (σ< 0·11). LiDAR‐based WL gradients...
Ikuko Fujisaki, Frank J. Mazzotti, Robert M. Dorazio, Kenneth G. Rice, Michael Cherkiss, Brian Jeffery
2011, Wetlands (31) 147-155
Nightlight surveys are commonly used to evaluate status and trends of crocodilian populations, but imperfect detection caused by survey- and location-specific factors makes it difficult to draw population inferences accurately from uncorrected data. We used a two-stage hierarchical model comprising population abundance and detection probability to examine recent abundance trends...
W. Yuan, Y. Luo, X. Li, S. Liu, G. Yu, T. Zhou, M. Bahn, A. Black, A.R. Desai, A. Cescatti, B. Marcolla, C. Jacobs, J. Chen, M. Aurela, C. Bernhofer, B. Gielen, G. Bohrer, D.R. Cook, D. Dragoni, A.L. Dunn, D. Gianelle, T. Grnwald, A. Ibrom, M.Y. Leclerc, A. Lindroth, H. Liu, L.B. Marchesini, L. Montagnani, G. Pita, M. Rodeghiero, A. Rodrigues, G. Starr, Paul C. Stoy
2011, Global Biogeochemical Cycles (25) 1-14
Basal ecosystem respiration rate (BR), the ecosystem respiration rate at a given temperature, is a common and important parameter in empirical models for quantifying ecosystem respiration (ER) globally. Numerous studies have indicated that BR varies in space. However, many empirical ER models still use a global constant BR largely due...
E.T. Slonecker
2011, Conference Paper, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The information derived from the interpretation of historical aerial photographs is perhaps the most basic multitemporal application of remote-sensing data. Aerial photographs dating back to the early 20th century can be extremely valuable sources of historical landscape activity. In this application, imagery from 1918 to 1927 provided a wealth of...
E. C. Jamieson, C. D. Rennie, R. B. Jacobson, R. D. Townsend
2011, Journal of Hydraulic Engineering (137) 1064-1071
Detailed mapping of bathymetry and apparent bed load velocity using a boat-mounted acoustic Doppler current profiler (ADCP) was carried out along a 388-m section of the lower Missouri River near Columbia, Missouri. Sampling transects (moving boat) were completed at 5- and 20-m spacing along the study section....
B.L. Williams, R.W. Holtfreter, S.S. Ditchkoff, J. Barry Grand
2011, Journal of Wildlife Management (75) 655-659
Growing concerns surrounding established and expanding populations of wild pigs (Sus scrofa) have created the need for rapid and accurate surveys of these populations. We conducted surveys of a portion of the wild pig population on Fort Benning, Georgia, to determine if a longer time‐lapse interval than had been previously...
Rocco C. Cipriano, Brian Austin
2011, Book chapter, Fish diseases and disorders: viral, bacterial and fungal, Volume 3: viral, bacterial and fungal infections
No abstract available....
W. H. Langer
2011, Aggregates Manager (16) 36-36
A gravel pit that was a source of happy childhood memories showcases the evolution of mining technology....
W. R. McGillis, C. Langdon, B. Loose, Kimberly K. Yates, J. Corredor
2011, Geophysical Research Letters (38)
The metabolism of Cayo Enrique Reef, Puerto Rico, was studied using in situ methods during March 2009. Benthic O2 fluxes were used to calculate net community production using both the boundary layer gradient and enclosure techniques. The boundary layer O2 gradient and the drag coefficients were used to calculate productivity...
Edward A. du Bray, Charles R. Bacon, David A. John, Joseph L. Wooden, Frank K. Mazdab
2011, Geological Society of America Bulletin (123) 534-561
The Miocene Tatoosh intrusive suite south of Mount Rainier is composed of three broadly granodioritic plutons that are manifestations of ancestral Cascades arc magmatism. Tatoosh intrusive suite plutons have individually diagnostic characteristics, including texture, mineralogy, and geochemistry, and apparently lack internal contacts. New ion-microprobe U-Pb zircon ages indicate crystallization of...
James W. Ashley, M.P. Golombek, P. R. Christensen, S. W. Squyres, T.J. McCoy, C. Schroder, I. Fleischer, J. R. Johnson, Kenneth E. Herkenhoff, T. J. Parker
2011, Journal of Geophysical Research E: Planets (116)
The weathering of meteorites found on Mars involves chemical and physical processes that can provide clues to climate conditions at the location of their discovery. Beginning on sol 1961, the Opportunity rover encountered three large iron meteorites within a few hundred meters of each other. In order of discovery, these...
David J. Dean, Linda J. Scott, Patrick B. Shafroth, John C. Schmidt
2011, Geological Society of America Bulletin (123) 1908-1925
The channel of the lower Rio Grande in the Big Bend region rapidly narrows during years of low mean and peak flow. We conducted stratigraphic, sedimentologic, and dendrogeomorphic analyses within two long floodplain trenches to precisely reconstruct the timing and processes of recent floodplain formation. We show that the channel...
W. H. Langer
2011, Aggregates Manager (16) 64-64
Annual non-metallic minerals are typically twice the value of metallic minerals, which takes a little of the sparkle out of gold....
W. H. Langer
2011, Aggregates Manager (16) 44-44
Among the many European millstones, the geology of the French burrstone was prized for the effect of its quartz grain....
Robert W. Hook, Peter D. Warwick, John R. SanFilipo, Adam C. Schultz, Douglas J. Nichols, Sharon M. Swanson
Peter D. Warwick, Alexander K. Karlsen, Matthew D. Merrill, Brett J. Valentine, editor(s)
2011, Book chapter, Geologic assessment of coal in the Gulf of Mexico coastal plain
Coal deposits in the Wilcox Group of central Texas have been regarded as the richest coal resources in the Gulf Coastal Plain. Although minable coal beds appear to be less numerous and generally higher in sulfur content (1 percent average, as-received basis; table 1) than Wilcox coal deposits in the...
D. Wu, J. Lei, B. Zheng, X. Tang, M. Wang, Jiawen Hu, S. Li, B. Wang, R. B. Finkelman
2011, Chinese Journal of Geochemistry (30) 248-254
Three hundred and six coal samples were taken from main coal mines of twenty-six provinces, autonomous regions, and municipalities in China, according to the resource distribution and coal-forming periods as well as the coal ranks and coal yields. Nitrogen was determined by using the Kjeldahl method at U. S. Geological...
Margaret Hiza, Klara B. Kelley, Harris Francis, Debra Block
2011, Report, 2011 Global Assessment Report on Disaster Risk Reduction
The Navajo Nation is an ecologically sensitive semi-arid to arid section of the southern Colorado Plateau. In this remote part of the United States, located at the Four Corners (Arizona, New Mexico, Colorado, and Utah), traditional people live a subsistence lifestyle that is inextricably tied to, and dependent upon, landscape...
Robert W. Hook, Peter D. Warwick, John R. SanFilipo, Douglas J. Nichols, Sharon M. Swanson
Peter D. Warwick, Alexander K. Karlsen, Matthew D. Merrill, Brett J. Valentine, editor(s)
2011, Book chapter, Geologic assessment of coal in the Gulf of Mexico coastal plain
The surface exposure of the Paleocene Wilcox Group in northeast Texas varies in width from 9 to 27 mi along an arcuate outcrop that extends southwest approximately 156 mi from the Texas-Arkansas State line to 32° latitude. Parts of Bowie, Camp, Cass, Franklin, Henderson, Hopkins, Morris, Navarro, Rains, Titus, Van...
Mark A. Engle, Lawrence F. Radke, Edward L. Heffern, Jennifer M.K. O’Keefe, Charles Smeltzer, James C. Hower, Judith M. Hower, Anupma Prakash, Allan Kolker, Robert J. Eatwell, Arnout ter Schure, Gerald Queen, Kerry L. Aggen, Glenn B. Stracher, Kevin R. Henke, Ricardo A. Olea, Yomayara Roman-Colon
2011, International Journal of Coal Geology (88) 147-151
Coal fires occur in all coal-bearing regions of the world and number, conservatively, in the thousands. These fires emit a variety of compounds including greenhouse gases. However, the magnitude of the contribution of combustion gases from coal fires to the environment is highly uncertain, because adequate data and methods for...
A. Das, J. Battles, N.L. Stephenson, Phillip J. van Mantgem
2011, Forest Ecology and Management (261) 1203-1213
Competition is a well-documented contributor to tree mortality in temperate forests, with numerous studies documenting a relationship between tree death and the competitive environment. Models frequently rely on competition as the only non-random mechanism affecting tree mortality. However, for mature forests, competition may cease to be the primary driver...
Jonathan M. Nelson, Paul J. Kinzel, Duong Duc Toan, Yasuyuki Shimizu, Richard R. McDonald
2011, Conference Paper
Predicting the planform and dimensions of a channel downstream from a confluence of two smaller channels with known sediment and water supplies is a fundamental, well-studied problem in geomorphology and engineering. An analogous but less well understood problem is found well downstream of such confluences, where large river channels split into...