Pliocene transpressional modification of depositional basins by convergent thrusting adjacent to the "Big Bend" of the San Andreas fault: An example from Lockwood Valley, southern California
K.S. Kellogg, S.A. Minor
2005, Tectonics (24) 1-12
The "Big Bend" of the San Andreas fault in the western Transverse Ranges of southern California is a left stepping flexure in the dextral fault system and has long been recognized as a zone of relatively high transpression compared to adjacent regions. The Lockwood Valley region, just south of the...
Biomass, production and woody detritus in an old coast redwood (Sequoia sempervirens) forest
R. T. Busing, T. Fujimori
2005, Plant Ecology (177) 177-188
We examined aboveground biomass dynamics, aboveground net primary production (ANPP), and woody detritus input in an old Sequoia sempervirens stand over a three-decade period. Our estimates of aboveground biomass ranged from 3300 to 5800 Mg ha-1. Stem biomass estimates ranged from 3000 to 5200 Mg ha-1. Stem biomass declined 7%...
Effects of biotic and abiotic factors on the distribution of trout and salmon along a longitudinal stream gradient
Hoz Franco De La Franco, E. A., P. Budy
2005, Environmental Biology of Fishes (72) 379-391
We examined the influence of biotic and abiotic factors on the distribution, abundance, and condition of salmonid fishes along a stream gradient. We observed a longitudinal change in fish distribution with native cutthroat trout, Oncorhynchus clarki utah, and introduced brown trout, Salmo trutta, demonstrating a distinct pattern of allopatry. Cutthroat...
Taxonomic relationships among Phenacomys voles as inferred by cytochrome b
M.R. Bellinger, S. M. Haig, E.D. Forsman, T.D. Mullins
2005, Journal of Mammalogy (86) 201-210
Taxonomic relationships among red tree voles (Phenacomys longicaudus longicaudus, P. l. silvicola), the Sonoma tree vole (P. pomo), the white-footed vole (P. albipes), and the heather vole (P. intermedius) were examined using 664 base pairs of the mitochondrial cytochrome b gene. Results indicate specific differences among red tree voles, Sonoma...
Physically modeling operative temperatures and evaporation rates in amphibians
P.E. Bartelt, C.R. Peterson
2005, Journal of Thermal Biology (30) 93-102
(1) We designed a physical model that simulates the thermal and evaporative properties of live Western toads (Bufo boreas). (2) In controlled tests, the model tracked the body temperature of live toads with an average error of 0.3±0.03 °C (test range=4–30 °C). (3) It estimated the evaporative water loss of live toads with...
Factors controlling tungsten concentrations in ground water, Carson Desert, Nevada
R. L. Seiler, K.G. Stollenwerk, J.R. Garbarino
2005, Applied Geochemistry (20) 423-441
n investigation of a childhood leukemia cluster by US Centers for Disease Control and Prevention revealed that residents of the Carson Desert, Nevada, are exposed to high levels of W and this prompted an investigation of W in aquifers used as drinking water sources. Tungsten concentrations in 100 ground water...
New constraints on mechanisms of remotely triggered seismicity at Long Valley Caldera
E. E. Brodsky, S. G. Prejean
2005, Journal of Geophysical Research B: Solid Earth (110) 1-14
Regional-scale triggering of local earthquakes in the crust by seismic waves from distant main shocks has now been robustly documented for over a decade. Some of the most thoroughly recorded examples of repeated triggering of a single site from multiple, large earthquakes are measured in geothermal fields of the western...
Morphology and aging precision of statoliths from larvae of Columbia river basin lampreys
M.H. Meeuwig, J.M. Bayer
2005, North American Journal of Fisheries Management (25) 38-48
The general morphology and precision associated with age determination of statoliths from larval Pacific lampreys Lampetra tridentata and western brook lampreys L. richardsoni found within the Columbia River basin were examined. Significant positive correlations were observed between the size of left and right statoliths from individuals. Principal components analysis indicated...
Constraints on fault slip rates of the southern California plate boundary from GPS velocity and stress inversions
T.W. Becker, J.L. Hardebeck, G. Anderson
2005, Geophysical Journal International (160) 634-650
We use Global Positioning System (GPS) velocities and stress orientations inferred from seismicity to invert for the distribution of slip on faults in the southern California plate-boundary region. Of particular interest is how long-term slip rates are partitioned between the Indio segment of the San Andreas fault (SAF), the San...
Secondary sulfate minerals associated with acid drainage in the eastern US: Recycling of metals and acidity in surficial environments
J. M. Hammarstrom, R.R. Seal II, A. L. Meier, J.M. Kornfeld
2005, Chemical Geology (215) 407-431
Weathering of metal-sulfide minerals produces suites of variably soluble efflorescent sulfate salts at a number of localities in the eastern United States. The salts, which are present on mine wastes, tailings piles, and outcrops, include minerals that incorporate heavy metals in solid solution, primarily the highly soluble members of the...
"Sour gas" hydrothermal jarosite: Ancient to modern acid-sulfate mineralization in the southern Rio Grande Rift
V.W. Lueth, R. O. Rye, L. Peters
2005, Chemical Geology (215) 339-360
As many as 29 mining districts along the Rio Grande Rift in southern New Mexico contain Rio Grande Rift-type (RGR) deposits consisting of fluorite-barite??sulfide-jarosite, and additional RGR deposits occur to the south in the Basin and Range province near Chihuahua, Mexico. Jarosite occurs in many of these deposits as a...
Paleoproterozoic metamorphism in the northern Wyoming province: Implications for the assembly of Laurentia
P.A. Mueller, H.R. Burger, J. L. Wooden, J.B. Brady, J.T. Cheney, T.A. Hamrs, A.L. Heatherington, D.W. Mogk
2005, Journal of Geology (113) 169-179
U-Pb ages measured on zircons from the Tobacco Root Mountains and monazite from the Highland Mountains indicate that the northwestern Wyoming province experienced an episode of high-grade metamorphism at ???1.77 Ga. Leucosome emplaced in Archean gneisses from the Tobacco Root Mountains contains a distinctive population of zircons with an age...
Assessing contaminant sensitivity of endangered and threatened aquatic species: Part I. Acute toxicity of five chemicals
F.J. Dwyer, F.L. Mayer, L.C. Sappington, D.R. Buckler, C.M. Bridges, I.E. Greer, D.K. Hardesty, C.E. Henke, C.G. Ingersoll, J.L. Kunz, D.W. Whites, T. Augspurger, D.R. Mount, K. Hattala, G.N. Neuderfer
2005, Archives of Environmental Contamination and Toxicology (48) 143-154
Assessment of contaminant impacts to federally identified endangered, threatened and candidate, and state-identified endangered species (collectively referred to as "listed" species) requires understanding of a species' sensitivities to particular chemicals. The most direct approach would be to determine the sensitivity of a listed species to a particular contaminant or perturbation....
Structural evolution of fault zones in sandstone by multiple deformation mechanisms: Moab fault, southeast Utah
N.C. Davatzes, P. Eichhubl, A. Aydin
2005, Geological Society of America Bulletin (117) 135-148
Faults in sandstone are frequently composed of two classes of structures: (1) deformation bands and (2) joints and sheared joints. Whereas the former structures are associated with cataclastic deformation, the latter ones represent brittle fracturing, fragmentation, and brecciation. We investigated the distribution of these structures, their formation, and the underlying...
Strange bedfellows - A deep-water hermatypic coral reef superimposed on a drowned barrier island; Southern Pulley Ridge, SW Florida platform margin
B. D. Jarrett, A. C. Hine, R. B. Halley, D. F. Naar, S. D. Locker, A.C. Neumann, D. Twichell, C. Hu, B.T. Donahue, W.C. Jaap, D. Palandro, K. Ciembronowicz
2005, Marine Geology (214) 295-307
The southeastern component of a subtle ridge feature extending over 200 km along the western ramped margin of the south Florida platform, known as Pulley Ridge, is composed largely of a non-reefal, coastal marine deposit. Modern biostromal reef growth caps southern Pulley Ridge (SPR), making it the deepest hermatypic reef...
Landscape characteristics of Rhizophora mangle forests and propagule deposition in coastal environments of Florida (USA)
R. Sengupta, B. Middleton, C. Yan, M. Zuro, H. Hartman
2005, Landscape Ecology (20) 63-72
Field dispersal studies are seldom conducted at regional scales even though reliable information on mid-range dispersal distance is essential for models of colonization. The purpose of this study was to examine the potential distance of dispersal of Rhizophora mangle propagules by comparing deposition density with landscape characteristics of mangrove forests....
Parallel Fortran-MPI software for numerical inversion of the Laplace transform and its application to oscillatory water levels in groundwater environments
X. Zhan
2005, Environmental Modelling and Software (20) 279-284
A parallel Fortran-MPI (Message Passing Interface) software for numerical inversion of the Laplace transform based on a Fourier series method is developed to meet the need of solving intensive computational problems involving oscillatory water level's response to hydraulic tests in a groundwater environment. The software is a parallel version of...
Magmatic effects of the Cobb hot spot on the Juan de Fuca Ridge
John Chadwick, M. Perfit, I. Ridley, I. Jonasson, G. Kamenov, W. Chadwick, R. Embley, Roux P. le, M. Smith
2005, Journal of Geophysical Research B: Solid Earth (110) 1-16
The interaction of the Juan de Fuca Ridge with the Cobb hot spot has had a considerable influence on the magmatism of the Axial Segment of the ridge, the second-order segment that overlies the hot spot. In addition to the construction of the large volcanic edifice of Axial Seamount, the...
Wave spectral energy variability in the northeast Pacific
P.D. Bromirski, D.R. Cayan, R.E. Flick
2005, Journal of Geophysical Research C: Oceans (110) 1-15
The dominant characteristics of wave energy variability in the eastern North Pacific are described from NOAA National Data Buoy Center (NDBC) buoy data collected from 1981 to 2003. Ten buoys at distributed locations were selected for comparison based on record duration and data continuity. Long‐period (LP) [T > 12] s, intermediate‐period...
Broad-scale predictors of canada lynx occurrence in eastern North America
C.L. Hoving, D.J. Harrison, W.B. Krohn, R.A. Joseph, M. O'Brien
2005, Journal of Wildlife Management (69) 739-751
The Canada lynx (Lynx canadensis) is listed as a threatened species throughout the southern extent of its geographic range in the United States. Most research on lynx has been conducted in the western United States and Canada; little is known about the ecology of lynx in eastern North America. To...
Distribution patterns of mercury in Lakes and Rivers of northeastern North America
Ian F. Dennis, Thomas A. Clair, Charles T. Driscoll, Neil Kamman, Ann T. Chalmers, Jamie Shanley, Stephen A. Norton, Steve Kahl
2005, Ecotoxicology (14) 113-123
We assembled 831 data points for total mercury (Hgt) and 277 overlapping points for methyl mercury (CH3Hg+) in surface waters from Massachussetts, USA to the Island of Newfoundland, Canada from State, Provincial, and Federal government databases. These geographically indexed values were used to determine: (a) if large-scale spatial distribution patterns...
Basal tissue structure in the earliest euconodonts: Testing hypotheses of developmental plasticity in euconodont phylogeny
X.-P. Dong, P.C.J. Donoghue, J.E. Repetski
2005, Palaeontology (48) 411-421
The hypothesis that conodonts are vertebrates rests solely on evidence of soft tissue anatomy. This has been corroborated by microstructural, topological and developmental evidence of homology between conodont and vertebrate hard tissues. However, these conclusions have been reached on the basis of evidence from highly derived euconodont taxa and the...
Origin of secondary sulfate minerals on active andesitic stratovolcanoes
D. R. Zimbelman, R. O. Rye, G. N. Breit
2005, Chemical Geology (215) 37-60
Sulfate minerals in altered rocks on the upper flanks and summits of active andesitic stratovolcanoes result from multiple processes. The origin of these sulfates at five active volcanoes, Citlalte??petl (Mexico), and Mount Adams, Hood, Rainier, and Shasta (Cascade Range, USA), was investigated using field observations, petrography, mineralogy, chemical modeling, and...
A new synziphosurine (Chelicerata: Xiphosura) from the Late Llandovery (Silurian) Waukesha Lagerstatte, Wisconsin, USA
R. A. Moore, D. E. G. Briggs, S. J. Braddy, L. I. Anderson, Donald G. Mikulic, Joanne Kluessendorf
2005, Journal of Paleontology (79) 242-250
A new synziphosurine (Chelicerata:Xiphosura) is described from the Late Llandovery (Silurian) Konservat-Lagerstätte of Waukesha, Wisconsin, USA. Venustulus waukeshaensis n.gen. and sp. is characterized by a semicircular carapace with a slightly procurved posterior margin lacking genal spines and an opisthosoma composed of 10 freely articulating segments, divided into a preabdomen of seven...
Watershed-based survey designs
N.E. Detenbeck, D. Cincotta, J. M. Denver, S.K. Greenlee, A.R. Olsen, A.M. Pitchford
2005, Environmental Monitoring and Assessment (103) 59-81
Watershed-based sampling design and assessment tools help serve the multiple goals for water quality monitoring required under the Clean Water Act, including assessment of regional conditions to meet Section 305(b), identification of impaired water bodies or watersheds to meet Section 303(d), and development of empirical relationships between causes or sources...
