Surface deformation associated with the March 1996 earthquake swarm at Akutan Island, Alaska, revealed by C-band ERS and L-band JERS radar interferometry
Z. Lu, C. Wicks Jr., O. Kwoun, J.A. Power, D. Dzurisin
2005, Canadian Journal of Remote Sensing (31) 7-20
In March 1996, an intense earthquake swarm beneath Akutan Island, Alaska, was accompanied by extensive ground cracking but no eruption of Akutan volcano. Radar interferograms produced from L-band JERS-1 and C-band ERS-1/2 images show uplift associated with the swarm by as much as 60 cm on the western...
Indoor radon risk potential of Hawaii
G.M. Reimer, S.L. Szarzi
2005, Journal of Radioanalytical and Nuclear Chemistry (264) 365-369
A comprehensive evaluation of radon risk potential in the State of Hawaii indicates that the potential for Hawaii is low. Using a combination of factors including geology, soils, source-rock type, soil-gas radon concentrations, and indoor measurements throughout the state, a general model was developed that permits prediction for various regions...
Effects of pressure on aqueous chemical equilibria at subzero temperatures with applications to Europa
G.M. Marion, J.S. Kargel, D.C. Catling, S.D. Jakubowski
2005, Geochimica et Cosmochimica Acta (69) 259-274
Pressure plays a critical role in controlling aqueous geochemical processes in deep oceans and deep ice. The putative ocean of Europa could have pressures of 1200 bars or higher on the seafloor, a pressure not dissimilar to the deepest ocean basin on Earth (the Mariana Trench at 1100 bars of...
A new reconstruction of the Paleozoic continental margin of southwestern North America: Implications for the nature and timing of continental truncation and the possible role of the Mojave-Sonora megashear
C.H. Stevens, P. Stone, J.S. Miller
2005, Special Paper of the Geological Society of America 597-618
Data bearing on interpretations of the Paleozoic and Mesozoic paleogeography of southwestern North America are important for testing the hypothesis that the Paleozoic miogeocline in this region has been tectonically truncated, and if so, for ascertaining the time of the event and the possible role of the Mojave-Sonora megashear. Here,...
A universal surface complexation framework for modeling proton binding onto bacterial surfaces in geologic settings
D. Borrok, B.F. Turner, J.B. Fein
2005, American Journal of Science (305) 826-853
Adsorption onto bacterial cell walls can significantly affect the speciation and mobility of aqueous metal cations in many geologic settings. However, a unified thermodynamic framework for describing bacterial adsorption reactions does not exist. This problem originates from the numerous approaches that have been chosen for modeling bacterial surface protonation reactions....
Woody debris along an upland chronosequence in boreal Manitoba and its impact on long-term carbon storage
K.L. Manies, J.W. Harden, B. P. Bond-Lamberty, K. P. O’Neill
2005, Canadian Journal of Forest Research (35) 472-482
This study investigated the role of fire-killed woody debris as a source of soil carbon in black spruce (Picea mariana (Mill.) BSP) stands in Manitoba, Canada. We measured the amount of standing dead and downed woody debris along an upland chronosequence, including wood partially and completely covered by moss growth....
Ecohydrological control of deep drainage in arid and semiarid regions
M.S. Seyfried, S. Schwinning, Michelle Ann Walvoord, W. T. Pockman, B.D. Newman, R.B. Jackson, F. M. Phillips
2005, Ecology (86) 277-287
The amount and spatial distribution of deep drainage (downward movement of water across the bottom of the root zone) and groundwater recharge affect the quantity and quality of increasingly limited groundwater in arid and semiarid regions. We synthesize research from the fields of ecology and hydrology to address the issue...
A physical model for strain accumulation in the San Francisco Bay Region
F. F. Pollitz, M. Nyst
2005, Geophysical Journal International (160) 302-317
Strain accumulation in tectonically active regions is generally a superposition of the effects of background tectonic loading, steady-state dislocation processes, such as creep, and transient deformation. In the San Francisco Bay region (SFBR), the most uncertain of these processes is transient deformation, which arises primarily in association with large earthquakes....
Concentrations of cadmium, lead, and zinc in fish from mining-influenced waters of northeastern Oklahoma: Sampling of blood, carcass, and liver for aquatic biomonitoring
W. G. Brumbaugh, C. J. Schmitt, T.W. May
2005, Archives of Environmental Contamination and Toxicology (49) 76-88
The Tri-States Mining District (TSMD) of Missouri (MO), Kansas (KS), and Oklahoma (OK), USA, was mined for lead (Pb) and zinc (Zn) for more than a century. Mining ceased more than 30 years ago, but wastes remain widely distributed in the region, and there is evidence of surface- and groundwater...
Geology and tsunamigenic potential of submarine landslides in Santa Barbara Channel, Southern California
M. A. Fisher, W. R. Normark, H. Gary Greene, H.J. Lee, R. W. Sliter
2005, Marine Geology (224) 1-22
A large submarine landslide complex and four small landslides developed under the Santa Barbara Channel, suggesting a potential hazard from landslide-generated tsunamis. We integrate offshore stratigraphy and geologic structure, multibeam bathymetric information, and several kinds of seismic-reflection data to understand how and when the submarine landslides formed. Seismic-reflection data show...
Recent research on the Chesapeake Bay impact structure, USA - Impact debris and reworked ejecta
J. Wright Horton Jr., John N. Aleinikoff, Michael J. Kunk, Gregory S. Gohn, Lucy E. Edwards, Jean M. Self-Trail, David S. Powars, Glen A. Izett
2005, Book chapter
Four new coreholes in the western annular trough of the buried, late Eocene Chesapeake Bay impact structure provide samples of shocked minerals, cataclastic rocks, possible impact melt, mixed sediments, and damaged microfossils. Parautochthonous Cretaceous sediments show an upward increase in collapse, sand fluidization, and mixed sediment injections. These impact-modified sediments...
Integrating seismic reflection and geological data and interpretations across an internal basement massif: The southern Appalachian Pine Mountain window, USA
J.H. McBride, R. D. Hatcher Jr., W. J. Stephenson, R.J. Hooper
2005, Geological Society of America Bulletin (117) 669-686
The southern Appalachian Pine Mountain window exposes 1.1 Ga Grenvillian basement and its metasedimentary Paleozoic(?) cover through the allochthonous Inner Piedmont. The issue of whether the crustal block inside the window was either transported above the master Appalachian (late Alleghanian) de??collement or is an autochthonous block that was overridden by...
Modeling effects of bank friction and woody bank vegetation on channel flow and boundary shear stress in the Rio Puerco, New Mexico
E.R. Griffin, J. W. Kean, K.R. Vincent, J.D. Smith, Jonathan M. Friedman
2005, Journal of Geophysical Research F: Earth Surface (110)
[1] We have applied a physically based model for steady, horizontally uniform flow to calculate reach-averaged velocity and boundary shear-stress distributions in a natural stream with woody vegetation on the channel banks. The model calculates explicitly the form drag on woody plant stems and includes the effects of vegetation on...
Environment of ore deposition in the Creede mining district, San Juan Mountains, Colorado: Part VI. Maximum duration for mineralization of the OH vein
W. R. Campbell, P.B. Barton
2005, Economic Geology (100) 1313-1324
The rate at which ore deposits form is one of the least well established parameters in all of economic geology. However, increased detail in sampling, improved technology of dating, and sophistication in modeling are reducing the uncertainties and establishing that ore formation, at least for the porphyry copper-skarn-epithermal base and...
Long-term analysis of survival, fertility, and population growth rate of black bears in North Carolina
L.L. Brongo, M.S. Mitchell, J.B. Grand
2005, Journal of Mammalogy (86) 1029-1035
We estimated survival, fertility, and realized and asymptotic population growth rates from 1981 to 2002 for a protected population of black bears (Ursus americanus) in the southern Appalachian Mountains. We used Akaike's information criterion to assess the time interval for averaging observations that was best for estimating vital rates for...
Reserve growth in oil fields of the North Sea
T. R. Klett, D. L. Gautier
2005, Petroleum Geoscience (11) 179-190
The assessment of petroleum resources of the North Sea, as well as other areas of the world, requires a viable means to forecast the amount of growth of reserve estimates (reserve growth) for discovered fields and to predict the potential fully developed sizes of undiscovered fields. This study investigates the...
Inhibition of calcite precipitation by natural organic material: Kinetics, mechanism, and thermodynamics
Y.-P. Lin, P.C. Singer, G. R. Aiken
2005, Environmental Science & Technology (39) 6420-6428
The inhibition of calcite precipitation by natural organic material (NOM) in solutions seeded with calcite was investigated using a pH-stat system. Experiments were carried out using three NOMs with different physical/chemical properties. For each of the materials, inhibition was found to be more effective at lower carbonate/calcium ratios and lower...
Seismically induced rock slope failures resulting from topographic amplification of strong ground motions: The case of Pacoima Canyon, California
S.A. Sepulveda, W. Murphy, R.W. Jibson, D.N. Petley
2005, Engineering Geology (80) 336-348
The 1994 Northridge earthquake (Mw = 6.7) triggered extensive rock slope failures in Pacoima Canyon, immediately north of Los Angeles, California. Pacoima Canyon is a narrow and steep canyon incised in gneissic and granitic rocks. Peak accelerations of nearly 1.6 g were recorded at a ridge that forms the left...
Numerical modeling of an estuary: A comprehensive skill assessment
J.C. Warner, W.R. Geyer, J.A. Lerczak
2005, Journal of Geophysical Research C: Oceans (110) 1-13
Numerical simulations of the Hudson River estuary using a terrain-following, three-dimensional model (Regional Ocean Modeling System (ROMS)) are compared with an extensive set of time series and spatially resolved measurements over a 43 day period with large variations in tidal forcing and river discharge. The model is particularly effective at...
Can superior natural amenities create high-quality employment opportunities? The case of nonconsumptive river recreation in central Idaho
J.R. McKean, D.M. Johnson, Richard L. Johnson, R.G. Taylor
2005, Society and Natural Resources (18) 749-758
Central Idaho has superior environmental amenities, as evidenced by exceptionally high-value tourism, such as guided whitewater rafting. The focus of our study concerns the attainment of high-quality jobs in a high-quality natural environment. We estimate cumulative wage rate effects unique to nonconsumptive river recreation in central Idaho for comparison with...
DEM, tide and velocity over sulzberger ice shelf, West Antarctica
S. Baek, C. K. Shum, H. Lee, Y. Yi, Oh-Ig Kwoun, Z. Lu, Andreas Braun
2005, Conference Paper, International Geoscience and Remote Sensing Symposium (IGARSS) proceedings
Arctic and Antarctic ice sheets preserve more than 77% of the global fresh water and could raise global sea level by several meters if completely melted. Ocean tides near and under ice shelves shifts the grounding line position significantly and are one of current limitations to study glacier dynamics and...
Habitat restoration as a means of controlling non-native fish in a Mojave desert Oasis
G.G. Scoppettone, P.H. Rissler, C. Gourley, C. Martinez
2005, Restoration Ecology (13) 247-256
Non-native fish generally cause native fish decline, and once non-natives are established, control or elimination is usually problematic. Because non-native fish colonization has been greatest in anthropogenically altered habitats, restoring habitat similar to predisturbance conditions may offer a viable means of non-native fish control. In this investigation we identified habitats...
1-D/3-D geologic model of the Western Canada Sedimentary Basin
D.K. Higley, M. Henry, L. N. R. Roberts, D.W. Steinshouer
2005, Mountain Geologist (42) 53-66
The 3-D geologic model of the Western Canada Sedimentary Basin comprises 18 stacked intervals from the base of the Devonian Woodbend Group and age equivalent formations to ground surface; it includes an estimated thickness of eroded sediments based on 1-D burial history reconstructions for 33 wells across the study area....
Numerical simulation of saltwater intrusion in response to sea-level rise
C.D. Langevin, A.M. Dausman
2005, Conference Paper, World Water Congress 2005: Impacts of Global Climate Change - Proceedings of the 2005 World Water and Environmental Resources Congress
A two dimensional numerical model of variable-density groundwater flow and dispersive solute transport was used to predict the extent, rate, and lag time of saltwater intrusion in response to various sea-level rise scenarios. Three simulations were performed with varying rates of sea-level rise. For the first simulation, sea-level rise was...
An updated global earthquake catalogue for stable continental regions: Reassessing the correlation with ancient rifts
S.M. Schulte, Walter D. Mooney
2005, Geophysical Journal International (161) 707-721
We present an updated global earthquake catalogue for stable continental regions (SCRs; i.e. intraplate earthquakes) that is available on the Internet. Our database contains information on location, magnitude, seismic moment and focal mechanisms for over 1300 M (moment magnitude) ≥ 4.5 historic and instrumentally recorded crustal events. Using this updated earthquake database...
