Case study of the environmental signature of a recently abandoned, carbonate-hosted replacement deposit: The Clayton Mine, Idaho
J. M. Hammarstrom, R. G. Eppinger, B.S. Gosen, Paul H. Briggs, A. L. Meier
2002, Open-File Report 2002-10
No abstract available....
Geologic map of the Tetilla Peak Quadrangle, Santa Fe and Sandoval counties, New Mexico
D.A. Sawyer, R. R. Shroba, S.A. Minor, R. A. Thompson
2002, Miscellaneous Field Studies Map 2352
This digital geologic map summarizes all available geologic information for the Tetilla Peak quadrangle located immediately southwest of Santa Fe, New Mexico. The geologic map consists of new polygon (geologic map units) and line (contact, fault, fold axis, dike, flow contact, hachure) data, as well as point data (locations...
Correlation of late Cenozoic basaltic lava flows in the Carbondale and Eagle collapse centers in west-central Colorado based on geochemical, isotopic, age, and petrographic data
James R. Budahn, D. M. Unruh, Michael J. Kunk, Frank M. Byers Jr., R. M. Kirkham, R. K. Streufert
2002, GSA Special Papers (366) 167-196
Major-, minor-, and trace-element abundance data on 220, late Cenozoic, basaltic rocks in and around the Carbondale and Eagle collapse centers in west-central Colorado are combined with isotopic, age, and petrographic data to correlate lava flows and establish the timing and minimum areal extent of collapse events associated with removal...
Tertiary cooling and tectonic history of the White River uplift, Gore Range, and western Front Range, central Colorado: Evidence from fission-track and 39Ar/ 40Ar ages
C. W. Naeser, Bruce Bryant, Michael J. Kunk, Karl S. Kellogg, R.A. Donelick, W. J. Perry Jr.
2002, GSA Special Papers (366) 31-53
Apatite fission-track (AFT) data from Proterozoic and Paleozoic rocks in the mountains of north central Colorado (White River Uplift, Gore Range, and western Front Range) record significant cooling that began with uplift and erosion related to the Laramide Orogeny and continued through the Tertiary to Pliocene time. The mountains immediately...
40Ar/39Ar ages of late Cenozoic volcanic rocks within and around the Carbondale and Eagle collapse centers, Colorado: Constraints on the timing of evaporite-related collapse and incision of the Colorado River
Michael J. Kunk, James R. Budahn, D. M. Unruh, Josette O. Stanley, R. M. Kirkham, Bruce Bryant, R. B. Scott, David J. Lidke, R. K. Streufert
2002, GSA Special Papers (366) 213-234
40Ar/ 39Ar dating results of 133 samples from 84 late Cenozoic volcanic rocks provide emplacement ages that constrain the timing of evaporite collapse and the incision rates of the Colorado River. Our samples are from areas in west-central Colorado, both within and outside of the Carbondale and Eagle collapse centers....
Eagle collapse center: Interpretation of evidence for late Cenozoic evaporite-related deformation in the Eagle River basin, Colorado
David J. Lidke, Mark R. Hudson, R. B. Scott, Ralph R. Shroba, Michael J. Kunk, W. J. Perry Jr., R. M. Kirkham, James R. Budahn, R. K. Streufert, J.O. Stanley, B.L. Widmann
2002, GSA Special Papers (366) 101-120
Evaporite tectonism resulted in deformation and collapse over an area of ~2500 km2 that is referred to as the Eagle collapse center. The collapse center includes much of the Eagle and Colorado River drainage basins between Vail, Dotsero, and McCoy, Colorado. The volume loss of evaporitic rocks by dissolution in...
Palynology of Eocene strata in the Sagavanirktok and Canning Formations on the North Slope of Alaska
Norman O. Frederiksen, Lucy E. Edwards, Thomas A. Ager, Thomas P. Sheehan
2002, Palynology (26) 59-93
This paper describes, illustrates, and interprets Eocene palynomorph assemblages from the North Slope of Alaska, mainly from 31 outcrop samples from seven stratigraphic sections at Franklin Bluffs on the Sagavanirktok River. The top of the Sagwon Member of the Sagavanirktok Formation is shown to be a thin, coaly, apparently nonmarine...
Paleoenvironments of sedimentary interbeds in the Pliocene and Quaternary Big Lost Trough, eastern Snake River Plain, Idaho
Erick A. Bestland, Paul K. Link, Marvin A. Lanphere, Duane E. Champion
2002, Book chapter, Geology, hydrogeology, and environmental remediation: Idaho National Engineering and Environmental Laboratory, eastern Snake River plain, Idaho
No abstract available....
Accumulation and subsidence of the Pleistocene basaltic lava flows of the eastern Snake River Plain, Idaho
Duane E. Champion, Marvin A. Lanphere, Steven R. Anderson, Mel A. Kuntz
2002, Book chapter, Geology, hydrogeology, and environmental remediation: Idaho National Engineering and Environmental Laboratory, eastern Snake River plain, Idaho
No abstract available....
The 12 September 1999 Upper East Rift Zone dike intrusion at Kilauea Volcano, Hawaii
Peter Cervelli, P. Segall, F. Amelung, H. Garbeil, C. Meertens, S. Owen, Asta Mikijus, M. Lisowski
2002, Journal of Geophysical Research B: Solid Earth (107) ECV 3-1-ECV 3-13
Deformation associated with an earthquake swarm on 12 September 1999 in the Upper East Rift Zone of Kilauea Volcano was recorded by continuous GPS receivers and by borehole tiltmeters. Analyses of campaign GPS, leveling data, and interferometric synthetic aperture radar (InSAR) data from the ERS-2 satellite also reveal significant deformation...
The Sacatosa coalbed methane field: A first For Texas
Charles E. Barker, Peter D. Warwick, Robert J. Scott, J.M. Klein, R.W. Hook
2002, Conference Paper, AAPG Annual Meeting
In 2001, The Exploration Company (TXCO), San Antonio, announced the Sacatosa Coalbed Methane (CBM) Field in Maverick County. This field is the first CBM field in Texas (Fig. 1). The field is producing from bituminous coal in the Cretaceous Olmos Formation that outcrops to the west and dips easterly towards...
Forage quantity and quality
Janet C. Jorgenson, Mark S. Udevitz, Nancy A. Felix
David C. Douglas, Patricia E. Reynolds, E. B. Rhode, editor(s)
2002, Biological Science Report 2002-0001-5
The Porcupine caribou herd has traditionally used the coastal plain of the Arctic National Wildlife Refuge, Alaska, for calving. Availability of nutritious forage has been hypothesized as one of the reasons the Porcupine caribou herd migrates hundreds of kilometers to reach the coastal plain for calving (Kuropat and Bryant 1980,...
Influence of topography on density of grassland passerines in pastures
R.B. Renfrew, C. A. Ribic
2002, American Midland Naturalist (147) 315-325
Pastures provide substantial habitat for grassland birds of management concern in the Driftless Area of southwestern Wisconsin. The rolling topography in this region is characterized by lowland valleys surrounded by relatively steep and often wooded slopes which are set apart from more expansive treeless uplands. We hypothesized that there would...
Morphology, volcanism, and mass wasting in Crater Lake, Oregon
C. R. Bacon, J.V. Gardner, L. A. Mayer, M.W. Buktenica, P. Dartnell, D.W. Ramsey, J.E. Robinson
2002, Geological Society of America Bulletin (114) 675-692
Crater Lake was surveyed nearly to its shoreline by high-resolution multibeam echo sounding in order to define its geologic history and provide an accurate base map for research and monitoring surveys. The bathymetry and acoustic backscatter reveal the character of landforms and lead to a chronology for the concurrent filling...
Responses of dabbling ducks to wetland conditions in the Prairie Pothole Region
J. E. Austin
2002, Waterbirds (25) 465-473
The relationships between wetland water conditions and breeding numbers of Mallard (Anas platyrhynchos), Northern Pintail (A. acuta), Blue-winged Teal (A. discors), and Northern Shoveler (A. clypeata) during May of 1992-1995, were examined on twelve study areas in the eastern Prairie Pothole Region. Data were collected on...
Early to Middle Proterozoic construction of the Mojave province, southwestern United States
D.S. Coleman, A. P. Barth, J. L. Wooden
2002, Gondwana Research (5) 75-78
Zircon and monazite U-Pb geochronology of rocks in the western Mojave province of the southwest US reveals that the Proterozoic arc exposed there shares an intrusive and deformational history with rocks exposed further east in the Yavapai and Mazatzal belts after approximately 1780 Ma. Consequently, it seems likely that the...
SHRIMP U-Pb and 40Ar/39Ar age constraints for relating plutonism and mineralization in the Boulder batholith region, Montana
Karen Lund, John N. Aleinikoff, Michael J. Kunk, Daniel M. Unruh, G. D. Zeihen, W. C. Hodges, Edward A. du Bray, J. Michael O’Neill
2002, Economic Geology (97) 241-267
The composite Boulder batholith, Montana, hosts a variety of mineral deposit types, including important silver-rich polymetallic quartz vein districts in the northern part of the batholith and the giant Butte porphyry copper-molybdenum pre-Main Stage system and crosscutting copper-rich Main Stage vein system in the southern part of the batholith. Previous...
Ancient and modern subduction zone contributions to the mantle sources of lavas from the Lassen region of California inferred from Lu-Hf isotopic systematics
L. E. Borg, Janne Blichert-Toft, Michael A. Clynne
2002, Journal of Petrology (43) 705-723
Hafnium isotopic compositions have been determined on a suite of calc-alkaline and high-alumina-olivine tholeiitic lavas from the Lassen region of California and are used, in conjunction with previously published mineralogical, geochemical, and isotopic data, to constrain their petrogenesis. Positive correlation between εHf values and geochemical indices of the modern subduction component...
Influence of fracture anisotropy on ground water ages and chemistry, Valley and Ridge province, Pennsylvania
W.C. Burton, Niel Plummer, E. Busenberg, B.D. Lindsey, W.J. Gburek
2002, Ground Water (40) 242-257
Model ground water ages based on chlorofluorocarbons (CFCs) and tritium/helium-3 (3H/3He) data were obtained from two arrays of nested piezometers located on the north limb of an anticline in fractured sedimentary rocks in the Valley and Ridge geologic province of Pennsylvania. The fracture geometry of the gently east plunging fold...
Subsurface geometry and evolution of the Seattle fault zone and the Seattle Basin, Washington
Uri S. ten Brink, P.C. Molzer, M. A. Fisher, R.J. Blakely, R.C. Bucknam, T. Parsons, R. S. Crosson, K. C. Creager
2002, Bulletin of the Seismological Society of America (92) 1737-1753
The Seattle fault, a large, seismically active, east-west-striking fault zone under Seattle, is the best-studied fault within the tectonically active Puget Lowland in western Washington, yet its subsurface geometry and evolution are not well constrained. We combine several analysis and modeling approaches to study the fault geometry and evolution, including...
Effects of colony relocation on diet and productivity of Caspian terns
Daniel D. Roby, Ken Collis, Donald E. Lyons, D. P. Craig, Jessica Y. Adkins, Anne Mary Myers, Robert M. Suryan
2002, Journal of Wildlife Management (66) 662-673
We investigated the efficacy of management to reduce the impact of Caspian tern (Sterna caspia) predation on survival of juvenile salmonids (Oncorhynchus spp.) in the Columbia River estuary. Resource managers sought to relocate approximately 9,000 pairs of terns nesting on Rice Island (river km 34) to East Sand Island (river...
Arenig volcanic and sedimentary strata, central New Brunswick and eastern Maine
W. H. Poole, Robert B. Neuman
2002, Atlantic Geology (38) 109-134
Arenig strata in the Napadogan area of the Miramichi Highlands of west-central New Brunswick are similar to those of the Lunksoos anti-clinorial area of eastern Maine. Strata from both areas were deposited in a volcanic back-arc setting upon Cambrian-Tremadoc, deep-water, turbiditic quartzose strata on the northwest-facing Gander margin of Gondwana....
Assessing mine drainage pH from the color and spectral reflectance of chemical precipitates
D.J. Williams, J.M. Bigham, C.A. Cravotta III, S.J. Traina, J.E. Anderson, J.G. Lyon
2002, Applied Geochemistry (17) 1273-1286
The pH of mine impacted waters was estimated from the spectral reflectance of resident sediments composed mostly of chemical precipitates. Mine drainage sediments were collected from sites in the Anthracite Region of eastern Pennsylvania, representing acid to near neutral pH. Sediments occurring in acidic waters contained primarily schwertmannite and goethite...
Sensitive high resolution ion microprobe (SHRIMP) detrital zircon geochronology provides new evidence for a hidden neoproterozoic foreland basin to the Grenville Orogen in the eastern Midwest, U.S.A
J.O.S. Santos, L.A. Hartmann, N.J. McNaughton, R. M. Easton, R.G. Rea, P.E. Potter
2002, Canadian Journal of Earth Sciences (39) 1505-1515
A sensitive high resolution ion microprobe (SHRIMP) was used in combination with backscattered electron (BSE) and cathodoluminescence (CL) images to determine the age of detrital zircons from sandstones in the Neoproterozoic Middle Run Formation of the eastern Midwest, United States. Eleven samples from seven drill cores of the upper part...
A strategy for estimating the rates of recent United States land-cover changes
Thomas R. Loveland, Terry L. Sohl, S.V. Stehman, Alisa L. Gallant, K. L. Sayler, D.E. Napton
2002, Photogrammetric Engineering and Remote Sensing (68) 1091-1099
Information on the rates of land-use and land-cover change is important in addressing issues ranging from the health of aquatic resources to climate change. Unfortunately, there is a paucity of information on land-use and land-cover change except at very local levels. We describe a strategy for estimating land-cover change across...
