Detection of crystalline hematite mineralization on Mars by the Thermal Emission Spectrometer: evidence for near-surface water
P. R. Christensen, J. L. Bandfield, R. N. Clark, K.S. Edgett, V.E. Hamilton, T. Hoefen, H. H. Kieffer, R.O. Kuzmin, M. D. Lane, M. C. Malin, R.V. Morris, J.C. Pearl, R. Pearson, T. L. Roush, S. W. Ruff, M. D. Smith
2000, Journal of Geophysical Research E: Planets (105) 9623-9642
The Thermal Emission Spectrometer (TES) instrument on the Mars Global Surveyor (MGS) mission has discovered a remarkable accumulation of crystalline hematite (α-Fe2O3) that covers an area with very sharp boundaries approximately 350 by 350–750 km in size centered near 2°S latitude between 0° and 5°W longitude (Sinus Meridiani). Crystalline hematite...
The state and future of Mars polar science and exploration
S.M. Clifford, D. Crisp, D.A. Fisher, Kenneth E. Herkenhoff, S.E. Smrekar, P. C. Thomas, D. D. Wynn-Williams, R.W. Zurek, J.R. Barnes, B.G. Bills, E.W. Blake, W. M. Calvin, J.M. Cameron, M. H. Carr, P. R. Christensen, B. C. Clark, G.D. Clow, J.A. Cutts, D. Dahl-Jensen, W. B. Durham, F. P. Fanale, J.D. Farmer, F. Forget, K. Gotto-Azuma, R. Grard, R.M. Haberle, W. Harrison, R. Harvey, A.D. Howard, A.P. Ingersoll, P.B. James, J.S. Kargel, H. H. Kieffer, J. Larsen, K. Lepper, M. C. Malin, D. J. McCleese, B. Murray, J.F. Nye, D. A. Paige, S.R. Platt, J.J. Plaut, N. Reeh, J.W. Rice, D.E. Smith, C. R. Stoker, K. L. Tanaka, E. Mosley-Thompson, T. Thorsteinsson, S.E. Wood, A. Zent, M.T. Zuber, H.J. Zwally
2000, Icarus (144) 210-242
As the planet's principal cold traps, the martian polar regions have accumulated extensive mantles of ice and dust that cover individual areas of ∼106 km2 and total as much as 3–4 km thick. From the scarcity of superposed craters on their surface, these layered deposits are thought to be comparatively young—preserving a...
Numerical modeling of an enhanced very early time electromagnetic (VETEM) prototype system
T.J. Cui, W.C. Chew, A.A. Aydiner, D.L. Wright, D.V. Smith, J.D. Abraham
2000, IEEE Antennas and Propagation Magazine (42) 17-27
In this paper, two numerical models are presented to simulate an enhanced very early time electromagnetic (VETEM) prototype system, which is used for buried-object detection and environmental problems. Usually, the VETEM system contains a transmitting loop antenna and a receiving loop antenna, which run on a lossy ground to detect...
Hemlock stands contribute significantly to aquatic biodiversity Delaware Water Gap National Recreation Area
C.D. Snyder, J.A. Young, D. Lemarie, D. R. Smith, R. Ross, R. Bennett
2000, ESP Newsletter; The News Bulletin of the Entomological Society of Pennsylvania (35) i-ii
Plant Checklist for Point Reyes National Seashore (Revised)
Gary M. Fellers, Virginia Norris, Wilma Follette, Doreen Smith
2000, Book
No abstract available at this time...
Addendum to `numerical modeling of an enhanced very early time electromagnetic (VETEM) prototype system'
T.J. Cui, W.C. Chew, A.A. Aydiner, D.L. Wright, D.V. Smith, J.D. Abraham
2000, IEEE Antennas and Propagation Magazine (42) 54-57
Two numerical models to simulate an enhanced very early time electromagnetic (VETEM) prototype system that is used for buried-object detection and environmental problems are presented. In the first model, the transmitting and receiving loop antennas accurately analyzed using the method of moments (MoM), and then conjugate gradient (CG) methods with...
Bias survival estimates from tag-recovery models where catch-and-release is common, with an example from Atlantic striped bass (Morone saxatilis)
D. R. Smith, K.P. Burnham, D.M. Kahn, X. He, C.J. Goshorn, K.A. Hattala, A.W. Kahnle
2000, Canadian Journal of Fisheries and Aquatic Sciences (57) 886-897
Geologic setting of the Fortymile River area - Polyphase deformational history within part of the eastern Yukon-Tanana uplands of Alaska: A section in Geologic studies in Alaska by the U.S. Geological Survey, 1998
Warren C. Day, Bruce M. Gamble, Mitchell W. Henning, Bruce D. Smith
2000, Professional Paper 1615
The Fortymile River area lies within the Yukon-Tanana lithotectonic terrane of east-central Alaska. This terrane is a mosaic of several lithotectonic assemblages, each with a coherent lithologic, metamorphic, and deformational history. Previous workers have shown that the Fortymile River area is underlain by rocks of the Seventymile, Taylor Mountain, and...
Wolf-bison interactions in Yellowstone National Park
Douglas W. Smith, L. David Mech, Mary Meagher, Wendy E. Clark, Rosemary Jaffe, Michael K. Phillips, John A. Mack
2000, Journal of Mammalogy (81) 1128-1135
We studied interactions of reintroduced wolves (Canis lupus) with bison (Bison bison) in Yellowstone National Park. Only 2 of 41 wolves in this study had been exposed to bison before their translocation. Wolves were more successful killing elk (Cervus elaphus) than bison, and elk were more abundant than bison, so...
Evaluation of tag types and adhesives for marking freshwater mussels (Mollusca: Unionidae)
D. P. Lemarie, D. R. Smith, R.F. Villella, D.A. Weller
2000, Journal of Shellfish Research (19) 247-250
Analytical results and conceptual model of mine drainage at the Holden Mine, Chelan County, Washington
J. E. Kilburn, D. B. Smith, S. J. Sutley
1999, Open-File Report 99-348
Influence of temperature and substrate on infection rate, triactinomyxon production, and release duration from eastern tubifex worms infected with Myxobolus cerebralis
Thomas Waldrop, Vicki Blazer, David Smith, Bane Schill, Christine Densmore
B. Schill, T. Waldrop, V. Blazer, editor(s)
1999, Book, 5th Annual Whirling Disease Symposium: Research and Management Perspectives
Salmonid whirling disease is caused by Myxobolus cerebralis, a metazoan parasite with a two host life cycle involving salmonid fish a an aquatic oligochaete, Tubifex tubifex (Wolf, Markiw and Hiltunen, 1986). Whirling disease has been reported in 22 U.S. states with the greatest losses occurring in the salmonid fisheries...
Preliminary effects of water hardness on triactinomyxon production and development from eastern tubifex worms infected with Myxobolus cerebralis
Thomas B. Waldrop, Christine Densmore, Vicki Blazer, Dave Smith, Bane Schill
B. Schill, T. Waldrop, V. Blazer, editor(s)
1999, Book, 5th Annual Whirling Disease Symposium: Research and Management Perspectives
Whirling disease is caused by Myxobolus cerebralis and requires an intermediate oligochaete host identified as Tubifex tubifex (Wolf, Markiw, and Hiltunen, 1986). M. cerebralis spores ingested by the tubifex worms develop into triactinomyxons (tams) that are eventually released into the water column to infect salmonid fish. There may...
Potential effects of pathogen-induced hemlock forest decline on aquatic biodiversity in Delaware Water Gap National Recreation Area
C.D. Snyder, J.A. Young, D. Lemarie, D. R. Smith, R. Ross, R. Bennett
1999, Keystone Surveyor 6-7
Petrology and geochemistry of late-stage intrusions of the A-type, mid-Proterozoic Pikes Peak batholith (Central Colorado, USA): Implications for petrogenetic models
D. R. Smith, J. Noblett, R. A. Wobus, D. Unruh, J. Douglass, R. Beane, C. Davis, S. Goldman, G. Kay, B. Gustavson, B. Saltoun, J. Stewart
1999, Precambrian Research (98) 271-305
The ~1.08 Ga anorogenic, A-type Pikes Peak batholith (Front Range, central Colorado) is dominated by coarse-grained, biotite ?? amphibole syenogranites and minor monzogranites, collectively referred to as Pikes Peak granite (PPG). The batholith is also host to numerous small, late-stage plutons that have been subdivided into two groups (e.g. Wobus,...
The effects of crude oil and remediation burning on three clones of smooth cordgrass (Spartina alterniflora loisel.)
D.L. Smith, C.E. Proffitt
1999, Estuaries (22) 616-623
Burning has been employed as an oil spill remediation technique in coastal marshes, even though the combined and interactive effects of oil and burning on vegetation are poorly understood. Variation among clones of perennial marsh grasses in response to these perturbations is not known. We performed a greenhouse experiment designed...
Influence of eastern hemlock on aquatic biodiversity in Delaware Water Gap National Recreation Area
C. Snyder, J. Young, D. Smith, D. Lemarie, R. Ross, R. Bennett
1999, Report
No abstract available at this time...
Water resources data, North Carolina, water year 1998. Volume 1. Surface-water records
B.C. Ragland, D.G. Smith, R.G. Barker, J. B. Robinson
1999, Water Data Report NC-98-1
No abstract available....
Geomorphology, flood-plain tailings, and metal transport in the upper Clark Fork Valley, Montana
J. Dungan Smith, J. H. Lambing, D. A. Nimick, Charles Parrett, Michael Ramey, William Schafer
1998, Water-Resources Investigations Report 98-4170
No abstract available....
Geochemical baseline studies and relations between water quality and streamflow in the Upper Blackfoot River Watershed, Montana; progress report for July 1997 - March 1998
S.A. Nagorski, J.A. Shifflett, J.N. Moore, D. B. Smith
1998, Open-File Report 98-499
Bedrock geologic map of the Joplin 1° x 2° quadrangle, Kansas and Missouri
J. R. McCauley, D. C. Smith
1998, IMAP 2426-B
No abstract available....
Geochemical baselines for surface waters and stream sediments and processes controlling element mobility, Rough and Ready Creek and Oregon Caves National Monument and vicinity, southwestern Oregon
W. R. Miller, D. B. Smith, A. L. Meier, Paul H. Briggs, P. M. Theodorakos, R.F. Sanzolone, R. B. Vaughn
1998, Open-File Report 98-201
Electrogeochemical sampling with NEOCHIM - results of tests over buried gold deposits
R. W. Leinz, D. B. Hoover, D. L. Fey, D. B. Smith, T. Patterson
1998, Journal of Geochemical Exploration (61) 57-86
Electrogeochemical extraction methods are based on the migration of ions in an electric field. Ions present in soil moisture are transported by an applied current into fluids contained in special electrodes placed on the soil. The fluids are then collected and analyzed. Extractions are governed by Faraday's and Ohm's laws...
Limits of retrospective power analysis
P.D. Gerard, D. R. Smith, G. Weerakkody
1998, Journal of Wildlife Management (20) 801-807
Results from the Mars global surveyor thermal emission spectrometer
P. R. Christensen, D.L. Anderson, S.C. Chase, R.T. Clancy, R. N. Clark, B.J. Conrath, H. H. Kieffer, R.O. Kuzmin, M. C. Malin, J.C. Pearl, T. L. Roush, M. D. Smith
1998, Science (279) 1692-1696
The Thermal Emission Spectrometer spectra of low albedo surface materials suggests that a four to one mixture of pyroxene to plagioclase, together with about a 35 percent dust component provides the best fit to the spectrum. Qualitative upper limits can be placed on the concentration of carbonates (<10 percent), olivine...
