Dislocation pileup as a representation of strain accumulation on a strike-slip fault
J.C. Savage
2006, Journal of Geophysical Research B: Solid Earth (111)
The conventional model of strain accumulation on a vertical transform fault is a discrete screw dislocation in an elastic half-space with the Burgers vector of the dislocation increasing at the rate of relative plate motion. It would be more realistic to replace that discrete dislocation by a dislocation distribution, presumably...
Public expectations about access fees and road closures on public lands
K. Cline, B. L. Lamb, P.D. Ponds
2006, Journal of Environmental Planning and Management (49) 227-240
It is sometimes suggested that land managers could better communicate with the general public by relying on people who are active in community affairs to frame the message. By comparing responses from the 'attentive' and general public on the Colorado Plateau in the USA, this study investigated the expected effects...
Catastrophic sinkhole formation in Kansas: A case study
J.L. Lambrecht, R. D. Miller
2006, Leading Edge (Tulsa, OK) (25) 342-347
Sinkholes represent a hazard to property and human safety in a wide variety of geologic settings across the globe. In most cases, the subsidence rate of a sinkhole represents the most significant potential impact and risk to public safety. Since 1979, the Kansas Geological Survey has studied numerous sinkholes using...
Antarctic climate cooling and response of diatoms in glacial meltwater streams
R.M.M. Esposito, S.L. Horn, Diane M. McKnight, M.J. Cox, M.C. Grant, S. A. Spaulding, P.T. Doran, K.D. Cozzetto
2006, Geophysical Research Letters (33)
To understand biotic responses to an Antarctic cooling trend diatom samples from glacial meltwater streams in the McMurdo Dry Valleys, the largest ice-free area in Antarctica. Diatoms are abundant in these streams, and 24 of 40 species have only been found in the Antarctic. The percentage of these Antarctic diatom...
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...
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....
Disease emergence and resurgence—the wildlife-human connection
Milton Friend, James W. Hurley, Pauline Nol, Katherine E. Wesenberg
2006, Circular 1285
In 2000, the Global Outbreak Alert and Response Network (GOARN) was organized as a global disease watchdog group to coordinate disease outbreak information and health crisis response. The World Health Organization (WHO) is the headquarters for this network. Understandably, the primary focus for WHO is human health. However, diseases such...
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....
Alpine plant community trends on the elk summer range of Rocky Mountain National Park, Colorado: An analysis of existing data
Linda Zeigenfuss
2006, Open-File Report 2006-1122
The majority of the elk (Cervus elaphus) population of Rocky Mountain National Park in Colorado summer in the park’s high-elevation alpine and subalpine meadows and willow krummholz. The park’s population of white-tailed ptarmigan (Lagopus leucurus altipetens) depends on both dwarf and krummholz willows for food and cover. Concern about the...
Water quality of the Crescent River basin, Lake Clark National Park and Preserve, Alaska, 2003-2004
Timothy P. Brabets, Robert T. Ourso
2006, Scientific Investigations Report 2006-5151
The U.S. Geological Survey and the National Park Service conducted a water-quality investigation of the Crescent River Basin in Lake Clark National Park and Preserve from May 2003 through September 2004. The Crescent River Basin was studied because it has a productive sockeye salmon run that is important to the...
Tectonic models for Yucca Mountain, Nevada
Dennis W. O’Leary
2006, Memoir of the Geological Society of America (199) 105-153
Performance of a high-level nuclear waste repository at Yucca Mountain hinges partly on long-term structural stability of the mountain, its susceptibility to tectonic disruption that includes fault displacement, seismic ground motion, and igneous intrusion. Because of the uncertainty involved with long-term (10,000 yr minimum) prediction of tectonic events (e.g., earthquakes)...
Diurnal variation in rates of calcification and carbonate sediment dissolution in Florida Bay
K. K. Yates, R. B. Halley
2006, Estuaries and Coasts (29) 24-39
Water quality and criculation in Florida Bay (a shallow, subtropical estuary in south Florida) are highly dependent upon the development and evolution of carbonate mud banks distributed throughout the Bay. Predicting the effect of natural and anthropogenic perturbations on carbonate sedimentation requires an understanding of annual,...
Water-clover ferns, Marsilea, in the Southeastern United States
Colette C. Jacono, David M. Johnson
2006, Castanea (71) 1-14
A surge in the collection of exotic Marsilea, M. mutica, M. minuta and M. hirsuta in the southeastern United States has prompted the need for updated identification aids. This study provides an annotated key to all water-clover ferns occurring in the region. It describes and illustrates recently documented exotic species and a previously misidentified western introduction....
Modeling canopy turbulent flow over complex terrain
C. Yi, Russell K. Monson, Z. Zhai, D.E. Anderson, A.A. Turnipseed, Sean P. Burns, B. Lamb
2006, Conference Paper, 17th Symposium on Boundary Layers and Turbulence, 27th Conference on Agricultural and Forest Meteorology, 17th Conference on Biometeorology and Aerobiology
[No abstract available]...
Quaternary tectonic faulting in the Eastern United States
R. L. Wheeler
2006, Engineering Geology (82) 165-186
Paleoseismological study of geologic features thought to result from Quaternary tectonic faulting can characterize the frequencies and sizes of large prehistoric and historical earthquakes, thereby improving the accuracy and precision of seismic-hazard assessments. Greater accuracy and precision can reduce the likelihood of both underprotection and unnecessary design and construction costs....
Distribution of boreal toad populations in relation to estimated UV-B dose in Glacier National Park, Montana, USA
B. R. Hossack, S. A. Diamond, P.S. Corn
2006, Canadian Journal of Zoology (84) 98-107
A recent increase in ultraviolet B radiation is one hypothesis advanced to explain suspected or documented declines of the boreal toad (Bufo boreas Baird and Girard, 1852) across much of the western USA, where some experiments have shown ambient UV-B can reduce embryo survival. We examined B. boreas occupancy relative...
Methanogenic calcite, 13C-depleted bivalve shells, and gas hydrate from a mud volcano offshore southern California
J.R. Hein, W. R. Normark, B.R. McIntyre, T.D. Lorenson, C.L. Powell II
2006, Geology (34) 109-112
Methane and hydrogen sulfide vent from a cold seep above a shallowly buried methane hydrate in a mud volcano located 24 km offshore southern California in?? 800 m of water. Bivalves, authigenic calcite, and methane hydrate were recovered in a 2.1 m piston core. Aragonite shells of two bivalve species...
Habitat-based adaptive management at Mount Haggin Wildlife Management Area
R.B. Keigley, C.W. Fager
2006, Alces (42) 49-54
The 22,743-hectare Mount Haggin Wildlife Management Area was purchased in 1976, in part for moose (Alces alces) winter range. Observed moose populations climbed from a low of 7 in 1976 to a high of 56 in 2000. A 4-step management program was initiated in 2000 consisting of definition of management...
Measurements of the diurnal cycle of temperature, humidity, wind, and carbon dioxide in a subalpine forest during the carbon in the mountains experiment (CME04)
Sean P. Burns, Jielun Sun, S.P. Oncley, A.C. Delany, B.B. Stephens, D.E. Anderson, D. S. Schimel, D.H. Lenschow, Russell K. Monson
2006, Conference Paper, 17th Symposium on Boundary Layers and Turbulence, 27th Conference on Agricultural and Forest Meteorology, 17th Conference on Biometeorology and Aerobiology
[No abstract available]...
Growth history of Kilauea inferred from volatile concentrations in submarine-collected basalts
Michelle L. Coombs, Thomas W. Sisson, Peter W. Lipman
2006, Journal of Volcanology and Geothermal Research (151) 19-49
Major-element and volatile (H2O, CO2, S) compositions of glasses from the submarine flanks of Kilauea Volcano record its growth from pre-shield into tholeiite shield-stage. Pillow lavas of mildly alkalic basalt at 2600–1900 mbsl on the upper slope of the south flank are an intermediate link...
In situ study of mass transfer in aqueous solutions under high pressures via Raman spectroscopy: A new method for the determination of diffusion coefficients of methane in water near hydrate formation conditions
W.J. Lu, I.-M. Chou, R.C. Burruss, M.Z. Yang
2006, Applied Spectroscopy (60) 122-129
A new method was developed for in situ study of the diffusive transfer of methane in aqueous solution under high pressures near hydrate formation conditions within an optical capillary cell. Time-dependent Raman spectra of the solution at several different spots along the one-dimensional diffusion path were collected and thus the...
Timing of magmatism following initial convergence at a passive margin, southwestern U.S. Cordillera, and ages of lower crustal magma sources
A. P. Barth, J. L. Wooden
2006, Journal of Geology (114) 231-245
Initiation of the Cordilleran magmatic arc in the southwestern United States is marked by intrusion of granitic plutons, predominantly composed of alkali-calcic Fe- and Sr-enriched quartz monzodiorite and monzonite, that intruded Paleoproterozoic basement and its Paleozoic cratonal-miogeoclinal cover. Three intrusive suites, recognized on the basis of differences in high field...
Ostracods and facies of the Early and Middle Frasnian at Devils Gate in Nevada: Relationship to the Alamo Event
J.-G. Casier, I. Berra, Ewa Olempska, Charles Sandberg, A. Preat
2006, Acta Palaeontologica Polonica (51) 813-828
In order to document the Alamo Event and to investigate its influence on shallow-marine environments, we undertook a study of ostracods, conodonts, and analysis of the sedimentology of the lower member of the type Devils Gate Limestone, Six major carbonate microfacies (MF1-MF6) ranging from open-marine environments below storm wave base...
Influence of landscape-scale factors in limiting brook trout populations in Pennsylvania streams
P.M. Kocovsky, R.F. Carline
2006, Transactions of the American Fisheries Society (135) 76-88
Landscapes influence the capacity of streams to produce trout through their effect on water chemistry and other factors at the reach scale. Trout abundance also fluctuates over time; thus, to thoroughly understand how spatial factors at landscape scales affect trout populations, one must assess the changes in populations over time...
A non-invasive technique to bleed incubating birds without trapping: A blood-sucking bug in a hollow egg
P.H. Becker, C.C. Voigt, J.M. Arnold, R. Nagel
2006, Journal of Ornithology (147) 115-118
We describe a non-invasive technique to obtain blood samples from incubating birds without trapping and handling. A larval instar of the blood-sucking bug Dipetalogaster maximus (Heteroptera) was put in a hollowed artificial egg which was placed in a common tern Sterna hirundo) nest. A gauze-covered hole in the egg allowed...
