Canadian groundwater inventory: Regional hydrogeological characterization of the south-central part of the maritimes basin
C. Rivard, Y. Michaud, C. Deblonde, V. Boisvert, C. Carrier, R. H. Morin, T. Calvert, H. Vigneault, D. Conohan, S. Castonguay, R. Lefebvre, A. Rivera, M. Parent
2008, Bulletin of the Geological Survey of Canada 1-96
The Maritimes Groundwater Initiative (MGWI) is a large, integrated, regional hydrogeological study focusing on a representative area of the Maritimes Basin in eastern Canada. The study area covers a land surface of 10 500 km2, of which 9 400 km2 are underlain by sedimentary rocks. This sedimentary bedrock is composed...
Late Jurassic plutonism in the southwest U.S. Cordillera
A. P. Barth, J. L. Wooden, K. A. Howard, J.L. Richards
2008, Special Paper of the Geological Society of America 379-396
Although plate reconstructions suggest that subduction was an approximately steady-state process from the mid-Mesozoic through the early Tertiary, recent precise geochronologic studies suggest highly episodic emplacement of voluminous continental-margin batholiths in the U.S. Cordillera. In central and southern California and western Arizona, major episodes of batholithic magmatism are known to...
Fifteen woody species with potential for invasiveness in New England
C.T. Martine, S. Leicht-Young, P. Herron, A. Latimer
2008, Rhodora (110) 345-353
[No abstract available]...
Reply to comment by T. N. Narasimhan on “A method to estimate groundwater depletion from confining layers”
Christopher E. Neuzil, Leonard F. Konikow
2008, Water Resources Research (44)
We thank T. N. Narasimhan for his comment on our paper [Konikow and Neuzil, 2007] and for extending the discussion with a historical perspective, additional examples, and some considerations we did not discuss, including implications for water management. We support and agree with the thrust of his comments....
Precision of descriptors for percent marrow fat content for White-tailed Deer, Odocoileus viriginianus
L.D. Mech
2008, Canadian Field-Naturalist (122) 273-273
Based on 168 records of both verbal descriptors of White-tailed Deer (Odocoileus virginianus) femur-marrow fat and percentage of fat measured later, "gelatinous" served well to distinguish fat 56%....
Preliminary analysis of strong-motion recordings from the magnitude 8.0 Wenchuan, China, Earthquake of 12 May 2008
X. Li, Z. Zhou, M. Huang, R. Wen, H. Yu, D. Lu, Y. Zhou, J. Cui
2008, Seismological Research Letters (79) 844-854
[No abstract available]...
Eruptive history and tectonic setting of Medicine Lake Volcano, a large rear-arc volcano in the southern Cascades
Julie M. Donnelly-Nolan, Timothy L. Grove, M. A. Lanphere, Duane E. Champion, David W. Ramsey
2008, Journal of Volcanology and Geothermal Research (177) 313-328
Medicine Lake Volcano (MLV), located in the southern Cascades ∼ 55 km east-northeast of contemporaneous Mount Shasta, has been found by exploratory geothermal drilling to have a surprisingly silicic core mantled by mafic lavas. This unexpected result is very different from the long-held view derived from previous mapping of exposed geology that...
Evidence for ponding and catastrophic floods in central Valles Marineris, Mars
K.P. Harrison, M. G. Chapman
2008, Icarus (198) 351-364
The Valles Marineris canyon system of Mars is closely related to large flood channels, some of which emerge full born from chaotic terrain in canyon floors. Coprates Chasma, one of the largest Valles Marineris canyons, is connected at its west end to Melas Chasma and on its east end to...
Zero-inflated modeling of fish catch per unit area resulting from multiple gears: Application to channel catfish and shovelnose sturgeon in the Missouri River
A. Arab, M. L. Wildhaber, C. K. Wikle, C.N. Gentry
2008, North American Journal of Fisheries Management (28) 1044-1058
Fisheries studies often employ multiple gears that result in large percentages of zero values. We considered a zero-inflated Poisson (ZIP) model with random effects to address these excessive zeros. By employing a Bayesian ZIP model that simultaneously incorporates data from multiple gears to analyze data from the Missouri River, we...
A multi-model framework for simulating wildlife population response to land-use and climate change
B.H. McRae, N.H. Schumaker, R.B. McKane, R. T. Busing, A.M. Solomon, C.A. Burdick
2008, Ecological Modelling (219) 77-91
Reliable assessments of how human activities will affect wildlife populations are essential for making scientifically defensible resource management decisions. A principle challenge of predicting effects of proposed management, development, or conservation actions is the need to incorporate multiple biotic and abiotic factors, including land-use and climate change, that interact to...
Multistage late Cenozoic evolution of the Amargosa River drainage, southwestern Nevada and eastern California Society of America. All rights reserved
C.M. Menges
2008, Conference Paper, Special Paper of the Geological Society of America
Stratigraphic and geomorphic analyses reveal that the regional drainage basin of the modern Amargosa River formed via multistage linkage of formerly isolated basins in a diachronous series of integration events between late Miocene and latest Pleistocene-Holocene time. The 275-km-long Amargosa River system drains generally southward across a large (15,540 km<sup>...
Overcompensatory response of a smallmouth bass (Micropterus dolomieu) population to harvest: Release from competition?
E.F. Zipkin, P.J. Sullivan, E.G. Cooch, C.E. Kraft, B.J. Shuter, B.C. Weidel
2008, Canadian Journal of Fisheries and Aquatic Sciences (65) 2279-2292
An intensive seven-year removal of adult, juvenile, and young-of-the-year smallmouth bass (Micropterus dolomieu) from a north temperate lake (Little Moose Lake, New York, USA) resulted in an increase in overall population abundance, primarily due to increased abundance of immature individuals. We developed a density-dependent, stage-structured model to examine conditions under...
Complex seasonal patterns of primary producers at the land-sea interface
J. E. Cloern, A.D. Jassby
2008, Ecology Letters (11) 1294-1303
Seasonal fluctuations of plant biomass and photosynthesis are key features of the Earth system because they drive variability of atmospheric CO2, water and nutrient cycling, and food supply to consumers. There is no inventory of phytoplankton seasonal cycles in nearshore coastal ecosystems where forcings from ocean,...
Laboratory and field evaluation of a flushable oxic limestone drain for treatment of net-acidic drainage from a flooded anthracite mine, Pennsylvania, USA
C.A. Cravotta III
2008, Applied Geochemistry (23) 3404-3422
This paper demonstrates the use of dissolution-rate data obtained in the laboratory to indicate the potential quality of effluent from a field-scale oxic limestone drain (OLD) treatment system for neutralization of dilute acidic mine drainage (AMD). Effluent from the Reevesdale Mine South Dip Tunnel, a large source of AMD and...
Range-wide patterns of greater sage-grouse persistence
Cameron L. Aldridge, Scott E. Nielsen, Hawthorne L. Beyer, Mark S. Boyce, John W. Connelly, Steven T. Knick, Michael A. Schroeder
2008, Diversity and Distributions (14) 983-994
Aim: Greater sage-grouse (Centrocercus urophasianus), a shrub-steppe obligate species of western North America, currently occupies only half its historical range. Here we examine how broad-scale, long-term trends in landscape condition have affected range contraction. Location: Sagebrush biome of the western USA. Methods: Logistic regression was used to assess persistence and...
Gold deposits and occurrences of the Greater Caucasus, Georgia Republic: Their genesis and prospecting criteria
S.A. Kekelia, M.A. Kekelia, S.I. Kuloshvili, N.G. Sadradze, N.E. Gagnidze, V.Z. Yaroshevich, G.G. Asatiani, J. L. Doebrich, R.J. Goldfarb, E.E. Marsh
2008, Ore Geology Reviews (34) 369-386
The south-central part of the Greater Caucasus region, Georgia Republic, represents an extremely prospective region for significant orogenic gold deposits. Gold-bearing quartz veins are concentrated in two extensive WNW-trending belts, the Mestia-Racha and Svaneti districts, within the northern margin of the Southern Slope Zone of the Great Caucasus orogen. This...
Predicting recolonization patterns and interactions between potamodromous and anadromous salmonids in response to dam removal in the Elwha River, Washington State, USA
S.J. Brenkman, G.R. Pess, C.E. Torgersen, K.K. Kloehn, J.J. Duda, S.C. Corbett
2008, Northwest Science (82) 91-106
The restoration of salmonids in the Elwha River following dam removal will cause interactions between anadromous and potamodromous forms as recolonization occurs in upstream and downstream directions. Anadromous salmonids are expected to recolonize historic habitats, and rainbow trout (Oncorhynchus mykiss) and bull trout (Salvelinus confluentus) isolated above the dams for...
Response of Late Cretaceous migrating deltaic facies systems to sea level, tectonics, and sediment supply changes, New Jersey Coastal Plain, U.S.A.
A.A. Kulpecz, K.G. Miller, P. J. Sugarman, J.V. Browning
2008, Journal of Sedimentary Research (78) 112-129
Paleogeographic, isopach, and deltaic lithofacies mapping of thirteen depositional sequences establish a 35 myr high resolution (> 1 Myr) record of Late Cretaceous wave- and tide-influenced deltaic sedimentation. We integrate sequences defined on the basis of lithologic, biostratigraphic, and Sr-isotope stratigraphy from cores with geophysical log data from 28 wells...
Thematic section: Introduction
S. W. Starratt
2008, Conference Paper, Journal of Coastal Research
[No abstract available]...
Using semi-permeable membrane devices and stable nitrogen isotopes to detect anthropogenic influences on the Truckee River, USA
L. Saito, Michael R. Rosen, S. Chandra, C.H. Fritsen, J.A. Arufe, C. Redd
2008, Environmental Engineering Science (25) 585-600
Stable nitrogen isotopes (??15N) and semipermeable membrane devices (SPMDs) were used together to provide evidence of potential anthropogenic connections to aquatic organisms in the Truckee River, which flows through the Reno/Sparks metropolitan area in Nevada. Crayfish, snail, and periphyton ??15N values, and SPMD toxicity data collected during high and low...
Stochastic and compensatory effects limit persistence of variation in body mass of young caribou
Bruce W. Dale, Layne G. Adams, William B. Collins, Kyle Joly, Patrick Valkenburg, Robert Tobey
2008, Journal of Mammalogy (89) 1130-1135
Nutritional restriction during growth can have short- and long-term effects on fitness; however, animals inhabiting uncertain environments may exhibit adaptations to cope with variation in food availability. We examined changes in body mass in free-ranging female caribou (Rangifer tarandus) by measuring mass at birth and at 4, 11, and 16...
Diffuse flow hydrothermal manganese mineralization along the active Mariana and southern Izu-Bonin arc system, western Pacific
J.R. Hein, M. S. Schulz, R.E. Dunham, R. J. Stern, S.H. Bloomer
2008, Journal of Geophysical Research B: Solid Earth (113)
Abundant ferromanganese oxides were collected along 1200 km of the active Izu-Bonin-Mariana arc system. Chemical compositions and mineralogy show that samples were collected from two deposit types: Fe-Mn crusts of mixed hydrogenetic/hydrothermal origin and hydrothermal Mn oxide deposits; this paper addresses only the second type. Mn oxides cement volcaniclastic and...
ALLTEM UXO detection and discrimination
T.H. Asch, D.L. Wright, C.W. Moulton, T.P. Irons, M.N. Nabighian
2008, Conference Paper, SEG Technical Program Expanded Abstracts
ALLTEM is a multi-axis electromagnetic induction system designed for unexploded ordnance (UXO) applications. It uses a continuous triangle-wave excitation and provides good late-time signal-to-noise ratio (SNR) especially for ferrous targets. Multi-axis transmitter (Tx) and receiver (Rx) systems such as ALLTEM provide a richer data set from which to invert for...
Brazilian analog for ancient marine environments on Mars
N.T. Bridges, S.J. Hook, B.J. Thomson, J.K. Crowley, Filho C.R. de Souza, J.B. Macambira, Pereira Silva de Lima Silva, G.
2008, Eos, Transactions, American Geophysical Union (89) 329-330
[No abstract available]...
Peri-equatorial paleolatitudes for Jurassic radiolarian cherts of Greece
I.W. Aiello, J.T. Hagstrum, G. Principi
2008, Tectonophysics (448) 33-48
Radiolarian-rich sediments dominated pelagic deposition over large portions of the Tethys Ocean during middle to late Jurassic time as shown by extensive bedded chert sequences found in both continental margin and ophiolite units of the Mediterranean region. Which paleoceanographic mechanisms and paleotectonic setting favored radiolarian deposition during the Jurassic, and...
