Changing imperatives of architecture affecting dimension stone use in world commerce
W.H. Mcdonald, D.D. Darr
1996, Mining Engineering (48) 49-52
The use of stone in building construction predates written history. From the time that stone was first used, builders have constructed stone buildings predominately from local or regional materials. However, since World War II, the stone business has become increasingly global. For example, French limestone is now sold to builders...
Constraints on the thermal history of Taylorsville Basin, Virginia, U.S.A., from fluid-inclusion and fission-track analyses: Implications for subsurface geomicrobiology experiments
H.-Y. Tseng, T.C. Onstott, R.C. Burruss, D. S. Miller
1996, Chemical Geology (127) 297-311
Microbial populations have been found at the depth of 2621-2804 m in a borehole near the center of Triassic Taylorsville Basin, Virginia. To constrain possible scenarios for long-term survival in or introduction of these microbial populations to the deep subsurface, we attempted to refine models of thermal and burial history...
Pesticides in ground water: Do atrazine metabolites matter?
S. Liu, S.T. Yen, D.W. Kolpin
1996, Journal of the American Water Resources Association (32) 845-853
Atrazine and atrazine-residue (atrazine + two metabolites - deethylatrazine and deisopropylatrazine) concentrations were examined to determine if consideration of these atrazine metabolites substantially adds to our understanding of the distribution of this pesticide in groundwater of the midcontinental United States. The mean of atrazine.residue concentrations was 53 percent greater than...
Record of middle Pleistocene climate change from Buck Lake, Cascade Range, southern Oregon - Evidence from sediment magnetism, trace-element geochemistry, and pollen
J. G. Rosenbaum, R. L. Reynolds, D.P. Adam, J. Drexler, A.M. Sarna-Wojcicki, G.C. Whitney
1996, Geological Society of America Bulletin (108) 1328-1341
Comparison of systematic variations in sediment magnetic properties to changes in pollen assemblages in middle Pleistocene lake sediments from Buck Lake indicates that the magnetic properties are sensitive to changes in climate. Buck Lake is located in southern Oregon just east of the...
A two-stage model of fracture of rocks
V. Kuksenko, N. Tomilin, E. Damaskinskaya, D. Lockner
1996, Pure and Applied Geophysics (146)
In this paper we propose a two-stage model of rock fracture. In the first stage, cracks or local regions of failure are uncorrelated occur randomly throughout the rock in response to loading of pre-existing flaws. As damage accumulates in the rock, there is a gradual increase in the probability that...
The kansas geological survey and sigma gamma epsilon
L.H. Skelton
1996, The Compass: Earth Science Journal of Sigma Gamma Epsilon (72) 121-123
[No abstract available]...
Application of thermal analysis techniques in activated carbon production
G.L. Donnals, J.A. DeBarr, M. Rostam-Abadi, A.A. Lizzio, T.A. Brady
1996, ACS Division of Fuel Chemistry, Preprints (41) 8-10
Thermal analysis techniques have been used at the ISGS as an aid in the development and characterization of carbon adsorbents. Promising adsorbents from fly ash, tires, and Illinois coals have been produced for various applications. Process conditions determined in the preparation of gram quantities of carbons were used as guides...
Use of landslides for paleoseismic analysis
R.W. Jibson
1996, Engineering Geology (43) 291-323
In many environments, landslides preserved in the geologic record can be analyzed to determine the likelihood of seismic triggering. If evidence indicates that a seismic origin is likely for a landslide or group of landslides, and if the landslides can be dated, then a paleo-earthquake can be inferred, and some...
Rheology of water ices V and VI
W.B. Durham, L.A. Stern, S. H. Kirby
1996, Journal of Geophysical Research B: Solid Earth (101) 2989-3001
We have measured the mechanical strength (σ) of pure water ices V and VI under steady state deformation conditions. Constant displacement rate compressional tests were conducted in a gas apparatus at confining pressures from 400 < P < 800 MPa, temperatures from 209 < T < 270 K, and strain rates 7 × 10−7 < <img...
Late Pennsylvanian climate changes and palynomorph extinctions
R.M. Kosanke, C. B. Cecil
1996, Review of Palaeobotany and Palynology (90) 113-140
A major floral change occurs in the Upper Pennsylvanian strata in the Midcontinent, Illinois basin, and in the northern Appalachian basin of eastern United States. Lycospora spp. (derived from arborescent lycopsids) became extinct along with some other palynomorph taxa. This investigation is concerned with the importance of this major floral...
Infiltration and solute transport experiments in unsaturated sand and gravel, Cape Cod, Massachusetts: Experimental design and overview of results
David L. Rudolph, R. Gary Kachanoski, Michael A. Celia, Denis R. LeBlanc, Jonathon H. Stevens
1996, Water Resources Research (32) 519-532
A series of infiltration and tracer experiments was conducted in unsaturated sand and gravel deposits on Cape Cod, Massachusetts. A network of 112 porous cup lysimeters and 168 time domain reflectometry (TDR) probes was deployed at depths from 0.25 to 2.0 m below ground surface along the centerline of a...
Trace fossils and sedimentary facies from a Late Cambrian‐Early Ordovician tide‐dominated shelf (Santa Rosita Formation, northwest Argentina): Implications for ichnofacies models of shallow marine successions
M. Gabriela Mángano, Luis A. Buatois, Guillermo F. Acenolaza
1996, Ichnos: An International Journal for Plant and Animal Traces (5) 53-88
The Santa Rosita Formation is one the most widely distributed lower Paleozoic units of northwest Argentina. At the Quebrada del Salto Alto section, east of Purmamarca, Jujuy Province, it is represented by four sedimentary facies: thick‐bedded planar cross‐stratified quartzose sandstones (A), thin‐bedded planar cross‐stratified quartzose sandstones and mudstones (B), wave‐rippled...
Cadmium in the California Current system: Tracer of past and present upwelling
A. VanGeen, D.M. Husby
1996, Journal of Geophysical Research C: Oceans (101) 3489-3507
Over 100 samples were collected off the west coast of North America during 1991–1993 to determine the relation between wind‐driven upwelling and nearshore concentrations of dissolved silicate (Si), phosphate (P), and cadmium (Cd). Highly enriched in deep water offshore, these constituents are sensitive indicators of upwelling. Coastal...
Climatic and hydrologic oscillations in the Owens Lake basin and adjacent Sierra Nevada, California
L. V. Benson, J.W. Burdett, Michaele Kashgarian, S.P. Lund, F. M. Phillips, R. O. Rye
1996, Science (274) 746-749
Oxygen isotope and total inorganic carbon values of cored sediments from the Owens Lake basin, California, indicate that Owens Lake overflowed most of the time between 52,500 and 12,509 carbon-14 (14C) years before present (B.P.). Owens Lake desiccated during or after Heinrich event H1 and was hydrologically closed during Heinrich...
Anthropogenic sediment resuspension mechanisms in a shallow microtidal estuary
D. H. Schoellhamer
1996, Estuarine, Coastal and Shelf Science (43) 533-548
The mechanisms that resuspend bottom sediments in Hillsborough Bay, a shallow, microtidal, subtropical estuary in West-central Florida, were determined by analysing hydrodynamic and suspended-solids concentration data collected during several instrument deployments made in 1990 and 1991. Large vessels in a dredged ship channel can generate forced solitary long waves that...
Raton basin coalbed methane production picking up in Colorado
H. Thomas Hemborg
1996, Oil & Gas Journal (94) 101-102
Coalbed methane production in the Raton basin of south-central Colorado and northeast New Mexico has gone over pilot testing and entered the development stage which is expected to last several years. The development work is restricted to roughly a 25 mile by 15 mile wide `fairway' centered about 20 miles...
An introduction to the Woodworth Study Area
Douglas H. Johnson, Kenneth F. Higgins, Robert O. Woodward
1996, Conference Paper, Proceedings of the North Dakota Academy of Science
The Woodworth Study Area (WSA) was purchased by the U.S. Fish and Wildlife Service (FWS) during the early 1960's as a waterfowl production area. Unlike most such areas, its primary purpose was not to provide waterfowl breeding habitat directly, but instead it was dedicated for use as a research area...
Effects of grazing and burning on densities and habitats of breeding ducks in North Dakota
Arnold D. Kruse, Bonnie S. Bowen
1996, Journal of Wildlife Management (60) 233-246
Native grassland communities controlled by public agencies become increasingly important to the maintenance of many wildlife species as privately owned grasslands are destroyed or degraded for farming, mining, and development. In turn, wildlife on publicly owned grasslands are affected by the management techniques practiced by local managers. We studied the...
Seed dispersal by specialist versus generalist foragers: The plant's perspective
D.L. Larson
1996, Oikos (76) 113-120
I examined the seed dispersal ecology of the stem parasitic plant, desert mistletoe (Phoradendron californicum, Viscaceae), with the objectives of (1) determining the relative effectiveness of specialist and generalist foragers for seed dispersal, (2) determining the extent to which desert mistletoe fruiting characteristics correspond to those predicted for plants attracting...
Persistence of oiling in mussel beds three and four years after the Exxon Valdez oil spill
M.M. Babcock, G.V. Irvine, P.M. Harris, J.A. Cusick, S.D. Rice
S.D. Rice, R.B. Spies, D.A. Wolfe, B.A. Wright, editor(s)
1996, Conference Paper, American Fisheries Society Symposium 18: Proceedings of the "Exxon Valdez Oil Spill Symposium"
Dense beds of the mussel Mytilus trossulus affected by Exxon Valdez crude oil in Prince William Sound and along the Kenai and Alaska peninsulas were intentionally left untreated during shoreline cleanup activities in 1989-1991. In 1992 and 1993, mussels and sediments from 70 mussel beds in Prince William Sound and...
U-Pb and K-Ar geochronology in Paleozoic and Mesozoic intrusive rocks of the Coastal Cordillera, Valparaiso, Chile
Paulina Gana, Richard M. Tosdal
1996, Revista Geologica de Chile (23) 151-164
The U-Pb and K-Ar geochronology applied to intrusive rocks from the Coastal Batholith of Central Chile, demonstrates the existence of a basement block of the Mirasol Unit, with a crystallization age of 299??10 Ma, exposed in the northern block of the Melipilla Fault. The age of 214??1 Ma obtained in...
Survival of radiomarked canvasback ducklings in northwestern Minnesota
Carl E. Korschgen, Kevin P. Kenow, William L. Green, Douglas H. Johnson
1996, Journal of Wildlife Management (60) 120-132
Duckling survival, an important factor affecting annual recruitment, has not been determined adequately for canvasbacks (Aythya valisineria). We investigated the magnitude, timing, and causes of mortality of canvasback ducklings from hatch to fledging at the Agassiz National Wildlife Refuge (NWR) in northwestern Minnesota during 1987-90. During the 4 years, 217...
Mud cracks and dedolomitization in the Wittenoom Dolomite, Hamersley Group, Western Australia
J.S. Kargel, J.F. Schreiber Jr., C.P. Sonett
1996, Global and Planetary Change (14) 73-96
Several impure dolomitic limestone beds in an outcrop of the latest Archean Wittenoom Dolomite (Hamersley Group, Western Australia) are polygonally cracked. The cracks appear to be sub-aerial desiccation features, suggesting that the known area of shallow water and locally emergent conditions extended from the far eastern part of the basin...
Late Quaternary sedimentation on the Leidy Creek fan, Nevada–California: Geomorphic responses to climate change
Marith C. Reheis, Janet L. Slate, Constance K. Throckmorton, John P. McGeehin, Andre M. Sarna-Wojcicki, L. Dengler
1996, Basin Research (8) 279-299
Well-dated surface and subsurface deposits in semiarid Fish Lake Valley, Nevada and California, demonstrate that alluvial-fan deposition is strongly associated with the warm dry climate of the last two interglacial intervals, and that fans were stable and (or) incised during the last glaciation. Fan deposition was probably triggered by a...
Distribution of nitrate and orthophosphate in selected streams in Central Nebraska
R.A. Boyd
1996, Water Resources Bulletin (32) 1247-1257
The Central Nebraska Basins is one of 60 study units in the National Water-Quality Assessment Program of the U.S. Geological Survey. The study unit includes the Platte River and two major tributaries, the Loup and Elkhorn Rivers. Agriculture is the predominant land use in the study unit, with only eight...
