Lithostratigraphy and shear-wave velocity in the crystallized Topopah Spring Tuff, Yucca Mountain, Nevada
D.C. Buesch, K.H. Stokoe II, K.C. Won, Y.J. Seong, J.L. Jung, M.D. Schuhen
2006, Conference Paper, Proceedings of the 11th International High Level Radioactive Waste Management Conference, IHLRWM
Evaluation of the potential future response to seismic events of the proposed spent nuclear fuel and high-level radioactive waste repository at Yucca Mountain, Nevada, is in part based on the seismic properties of the host rock, the 12.8-million-year-old Topopah Spring Tuff. Because of the processes that formed the tuff, the...
Evidence of phyllosilicates in Wooly Patch, an altered rock encountered at West Spur, Columbia Hills, by the Spirit rover in Gusev crater, Mars
A. Wang, R.L. Korotev, B.L. Jolliff, L.A. Haskin, L. Crumpler, W. H. Farrand, Kenneth E. Herkenhoff, Jr. de Souza P., A.G. Kusack, J.A. Hurowitz, N.J. Tosca
2006, Journal of Geophysical Research E: Planets (111)
On its traverse to Columbia Hills, the Mars Exploration Rover Spirit investigated an outcrop designated “Wooly Patch” that exhibited morphological, mineralogical, and geochemical characteristics at the extreme ends of ranges observed among rocks studied at West Spur, a westward projecting salient near the foot of the Columbia Hills, Gusev crater....
Integrating field research, modeling and remote sensing to quantify morphodynamics in a high-energy coastal setting, ocean beach, San Francisco, California
P.L. Barnard, D.M. Hanes
2006, Conference Paper, Coastal Dynamics 2005 - Proceedings of the Fifth Coastal Dynamics International Conference
Wave and coastal circulation modeling are combined with multibeam bathymetry, high-resolution beach surveys, cross-shore Personal Water Craft surveys, digital bed sediment camera surveys, and real-time video monitoring to quantify morphological change and nearshore processes at Ocean Beach, San Francisco. Initial SWAN (Simulating Waves Nearshore) wave modeling results show a focusing...
Distribution of recent volcanism and the morphology of seamounts and ridges in the GLIMPSE study area: Implications for the lithospheric cracking hypothesis for the origin of intraplate, non-hot spot volcanic chains
D.W. Forsyth, N. Harmon, D.S. Scheirer, R.A. Duncan
2006, Journal of Geophysical Research B: Solid Earth (111)
Lithospheric cracking by remotely applied stresses or thermoelastic stresses has been suggested to be the mechanism responsible for the formation of intraplate volcanic ridges in the Pacific that clearly do not form above fixed hot spots. As part of the Gravity Lineations Intraplate Melting Petrology and Seismic Expedition (GLIMPSE) project...
Grenvillian magmatism in the northern Virginia Blue Ridge: Petrologic implications of episodic granitic magma production and the significance of postorogenic A-type charnockite
R.P. Tollo, J. N. Aleinikoff, E.A. Borduas, A.P. Dickin, R.H. McNutt, C.M. Fanning
2006, Precambrian Research (151) 224-264
Grenvillian (1.2 to 1.0 Ga) plutonic rocks in northern Virginia preserve evidence of episodic, mostly granitic magmatism that spanned more than 150 million years (m.y.) of crustal reworking. Crystallization ages determined by sensitive high resolution ion microprobe (SHRIMP) U-Pb isotopic analyses of zircon and monazite, combined with results from previous...
Trends in summer chemistry linked to productivity in lakes recovering from acid deposition in the Adirondack region of New York
B. Momen, G.B. Lawrence, S. A. Nierzwicki-Bauer, J.W. Sutherland, L.W. Eichler, J.P. Harrison, C.W. Boylen
2006, Ecosystems (9) 1306-1317
The US Environmental Protection Agency established the Adirondack Effects Assessment Program (AEAP) to evaluate and monitor the status of biological communities in lakes in the Adirondack region of New York that have been adversely affected by acid deposition. This program includes chemical analysis of 30 lakes, sampled two to three...
Pigs on the plains: Institutional analysis of a Colorado water quality initiative
D. King, N. Burkardt, Lamb B. Lee
2006, International Journal of Public Administration (29) 1411-1430
We used the Legal-Institutional Analysis Model (LIAM) and Advocacy Coalition Framework (ACF) to analyze the campaign over passage of the Colorado Hogs Rule, an initiative passed by the voters in 1998 to require regulation of swine production facilities in Colorado. Used in tandem, LIAM and ACF provided an opportunity to...
Negative magnetic anomaly over Mt. Resnik, a subaerially erupted volcanic peak beneath the West Antarctic Ice Sheet
John C. Behrendt, Carol A. Finn, D. L. Morse, D. D. Blankenship
2006, Terra Antarctica (12) 203-212
Mt. Resnik is one of the previously reported 18 subaerially erupted volcanoes (in the West Antarctic rift system), which have high elevation and high bed relief beneath the WAIS in the Central West Antarctica (CWA) aerogeophysical survey. Mt. Resnik lies 300 m below the surface of the West Antarctic Ice...
Foreword: Understanding through modeling
C. Zheng, E. Poeter, M. Hill, J. Doherty
2006, Conference Paper, Ground Water
[No abstract available]...
Response of Tridens flavus (L.) A. S. Hitchc. to soil nutrients and disturbance in an early successional old field
Y. A. K. Honu, D.J. Gibson, B.A. Middleton
2006, Journal of the Torrey Botanical Society (133) 421-428
Soil nutrients and disturbance are two of the main abiotic factors that influence plant dominance (canopy cover), density, and fecundity in early successional old field plant communities. The manner in which the dominant species in old field successional systems respond to the interaction of nutrients and disturbance is poorly known....
Evaluating hydraulic conductivity of desert soils at the Amargosa Desert Research Site near Beatty, Nevada
J.W. Wilson
2006, Thesis
No abstract available....
Conservation plan for the Marbled Godwit: Version 1.1
Cynthia Melcher, A. Farmer, G. Fernandez
2006, Report
No abstract available....
Oil resources - Estimates and uncertainties
D. L. Gautier
2006, Conference Paper, Society of Petroleum Engineers, 68th European Association of Geoscientists and Engineers Conference and Exhibition, incorporating SPE EUROPEC 2006, EAGE 2006: Opportunities in Mature Areas
Oil reserves are reasonably well known, but they are not a reliable indicator of longterm supply. Future oil availability will depend upon reserve additions, which are highly uncertain. New reserves will come from three sources: 1) new field discoveries, 2) growth of reserves in existing fields, and 3) development of...
Modeling spatial and temporal variations in temperature and salinity during stratification and overturn in Dexter Pit Lake, Tuscarora, Nevada, USA
Laurie S. Balistrieri, R.N. Tempel, L.L. Stillings, L.A. Shevenell
2006, Applied Geochemistry (21) 1184-1203
This paper examines the seasonal cycling of temperature and salinity in Dexter pit lake in arid northern Nevada, and describes an approach for modeling the physical processes that operate in such systems. The pit lake contains about 596,200 m3 of dilute, near neutral (pHs 6.7–9) water. Profiles of temperature, conductivity, and selected...
Examination of the watershed-wide distribution of Escherichia coli along southern Lake Michigan: An integrated approach
R.L. Whitman, M.B. Nevers, M.N. Byappanahalli
2006, Applied and Environmental Microbiology (72) 7301-7310
Recent research has highlighted the occurrence of Escherichia coli in natural habitats not directly influenced by sewage inputs. Most studies on E. coli in recreational water typically focus on discernible sources (e.g., effluent discharge and runoff) and fall short of integrating riparian, nearshore, onshore, and outfall sources. An integrated “beachshed” approach that links E. coli inputs...
Holocene environmental and parasequence development of the St. Jones Estuary, Delaware (USA): Foraminiferal proxies of natural climatic and anthropogenic change
E. Leorri, R. Martin, P. McLaughlin
2006, Palaeogeography, Palaeoclimatology, Palaeoecology (241) 590-607
The benthic foraminiferal record of marshes located along western Delaware Bay (St. Jones Estuary, USA) reflects the response of estuaries to sea-level and paleoclimate change during the Holocene. System tracts are recognized and within them parasequences based on sedimentological and foraminiferal assemblages identification. The parasequences defined by foraminiferal assemblages appear...
Seismic imaging of deep low-velocity zone beneath the Dead Sea basin and transform fault: Implications for strain localization and crustal rigidity
Uri S. ten Brink, A. S. Al-Zoubi, C.H. Flores, Y. Rotstein, I. Qabbani, S.H. Harder, Gordon R. Keller
2006, Geophysical Research Letters (33)
New seismic observations from the Dead Sea basin (DSB), a large pull-apart basin along the Dead Sea transform (DST) plate boundary, show a low velocity zone extending to a depth of 18 km under the basin. The lower crust and Moho are not perturbed. These observations are incompatible with the...
Tamarisk control, water salvage, and wildlife habitat restoration along rivers in the western United States
Patrick B. Shafroth
2006, Fact Sheet 2006-3071
In the latter part of the 19th century, species of the nonnative shrub tamarisk (also called saltcedar; for example, Tamarix ramosissima, T. chinensis) were introduced to the United States for use as ornamental plants for erosion control. By 1877, some naturalized populations had become established, and by the 1960s, tamarisk...
Landscape Assessment: Ground measure of severity, the Composite Burn Index; and Remote sensing of severity, the Normalized Burn Ratio
C.H. Key, N.C. Benson
2006, Report, FIREMON: Fire Effects Monitoring and Inventory System.
Abstract has not been submitted...
Interferometric synthetic aperture radar: Building tomorrow's tools today
Zhong Lu
2006, Alaska Satellite Facility News and Notes (15) 12-14
A synthetic aperture radar (SAR) system transmits electromagnetic (EM) waves at a wavelength that can range from a few millimeters to tens of centimeters. The radar wave propagates through the atmosphere and interacts with the Earth’s surface. Part of the energy is reflected back to the SAR system and recorded....
The Conservation Reserve Program: Planting for the future
Skip Hyberg, Arthur Allen
2006, Fact Sheet 2006-3078
Proceedings are now available from a scientific and technical forum held to review ongoing and planned research, identify lessons learned, and determine future research needs for the purpose of developing a rigorous scientific basis for future CRP policy discussions....
Cooperative Manatee Research in Puerto Rico
James P. Reid
2006, Endangered Species Bulletin (31) p 18-19
Abstract not supplied at this time...
Drowned coralline algal dominated deposits off Lanai, Hawaii; carbonate accretion and vertical tectonics over the last 30 ka
Jody M. Webster, David A. Clague, Juan Carlos Braga, Heather Spalding, Willem Renema, Christopher Kelley, Bruce Applegate, John R. Smith, Charles K. Paull, James G. Moore, Donald Potts
2006, Marine Geology (225) 223-246
We present detailed bathymetry, remotely operated vehicle (ROV) and submersible observations, and sedimentary and radiocarbon age data from carbonate deposits recovered from two submerged terraces at − 150 m (T1) and − 230 m (T2) off Lanai, Hawaii. The tops of the terraces are veneered by relatively thin (<5 m) in situ...
Rank score and permutation testing alternatives for regression quantile estimates
B.S. Cade, J.D. Richards, P.W. Mielke Jr.
2006, Journal of Statistical Computation and Simulation (76) 331-355
Performance of quantile rank score tests used for hypothesis testing and constructing confidence intervals for linear quantile regression estimates (0 ≤ τ ≤ 1) were evaluated by simulation for models with p = 2 and 6 predictors, moderate collinearity among predictors, homogeneous and hetero-geneous errors, small to moderate samples (n = 20–300), and central to upper quantiles (0.50–0.99)....
"HIP" new software: The Hydroecological Integrity Assessment Process
Jim Henriksen, Juliette T. Wilson
2006, Fact Sheet 2006-3088
Managing rivers and streams to maintain healthy aquatic ecosystems is a challenge for resource managers across the country. Demand for competing uses of water resources grows with escalating development, increasing recreational use, and the vagaries of climate and weather. For many species of concern, instream flow and associated water quality...
