J. G. Taylor, B. L. Lamb, N. Burkardt, S. Flick
1996, Hydro Review (15) 66-71
No abstract available....
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Publication Extents
Not all publications have extents, not all extents are completely accurateM. A. McGregor, J.T. Garner, Z.H. Bowen
1996, Book
No abstract available....
W. D. Stanley, S. Y. Johnson, A.I. Qamar, C.S. Weaver, J. M. Williams
1996, Bulletin of the Seismological Society of America (86) 1-18
Geophysical, geological, and seismicity data are combined to develop a transpressional strain model for the southern Washington Cascades region. We use this model to explain oblique fold and fault systems, transverse faults, and a linear seismic zone just west of Mt. Rainier known...
E.D. Landing, S. R. Westrop, L.A. Knox
1996, Journal of Paleontology (70) 656-680
Tremadocian onlap is recorded by the Tribes Hill Formation. The formation is a lower Lower Ordovician (upper conodont Fauna B Interval(?)-Rossodus manitouensis Zone) depositional sequence that unconformably overlies the Upper Cambrian Little Falls Formation.Depositional environments and stratigraphy indicate that the Tribes Hill was deposited on a wave-,...
F. Murphy, W.N. Herkelrath
1996, Ground Water Monitoring and Remediation (16) 86-90
Loss of fluids and samples during retrieval of cores of saturated, noncohesive sediments results in incorrect measures of fluid distributions and an inaccurate measure of the stratigraphic position of the sample. To reduce these errors, we developed a hollow drive shoe that freezes in place the...
J. Cai, G. A. McMechan, M. A. Fisher
1996, Bulletin of the Seismological Society of America (86) 1459-1470
In many geologic environments, ground-penetrating radar (GPR) provides high-resolution images of near-surface Earth structure. GPR data collection is nondestructive and very economical. The scale of features detected by GPR lies between those imaged by high-resolution seismic reflection surveys and those exposed in trenches...
S. Hartzell, A. Leeds, A. Frankel, J. Michael
1996, Bulletin of the Seismological Society of America (86) S168-S192
Ground-motion records from aftershocks of the 1994 Northridge earthquake are used to estimate site response in the urban Los Angeles area. Over 1300 shear-wave records from 61 sources and 90 sites are used in a linear inversion for source and site-response spectra. The...
W.D. Sharp, B. D. Turrin, P.R. Renne, M. A. Lanphere
1996, Journal of Geophysical Research B: Solid Earth (101) 11607-11616
Mauna Kea lava flows cored in the Hilo hole range in age from <200 ka to about 400 ka based on 40Ar/39Ar incremental heating and K‐Ar analyses of 16 groundmass samples and one coexisting plagioclase. The lavas, all subaerially deposited, include a lower section consisting only of tholeiitic...
J.K. Crowley, S.J. Hook
1996, Journal of Geophysical Research B: Solid Earth (101) 643-660
Efflorescent salt crusts and associated sediments in Death Valley, California, were studied with remote-sensing data acquired by the NASA thermal infrared multispectral scanner (TIMS). Nine spectral classes that represent a variety of surface materials were distinguished, including several classes that reflect important aspects of the playa groundwater chemistry and hydrology....
M.A.J. Taylor, G. Zheng, J.R. Rice, W.D. Stuart, R. Dmowska
1996, Journal of Geophysical Research B: Solid Earth (101) 8363-8381
We use the finite element method to analyze stress variations in and near a strongly coupled subduction zone during an earthquake cycle. Deformation is assumed to be uniform along strike (plane strain on a cross section normal to the trench axis), and periodic earthquake slip is imposed consistent with the...
S. S. Harlan
1996, Economic Geology (91) 1159-1162
No abstract available....
Andrew Simon, Colin R. Thorne
1996, Earth Surface Processes and Landforms (21) 155-180
Channel adjustments in the North Fork Toutle River and the Toutle River main stem were initiated by deposition of a 2.5km3 debris avalanche and associated lahars that accompanied the catastrophic eruption of Mount St. Helens, Washington on 18 May 1980. Channel widening was the dominant process. In combination, adjustments caused...
R. Minor, W.C. Grant
1996, American Antiquity (61) 772-781
Fire hearths associated with prehistoric Native American occupation lie within the youngest buried lowland soil of the estuaries along the Salmon and Nehalem rivers on the northern Oregon coast. This buried soil is the result of sudden subsidence induced by a great earthquake about 300 years ago along the Cascadia...
M. Guffanti, M.A. Clynne, L.J.P. Muffler
1996, Journal of Geophysical Research B: Solid Earth (101) 3003-3013
We have analyzed the heat and mass demands of a petrologic model of basalt-driven magmatic evolution in which variously fractionated mafic magmas mix with silicic partial melts of the lower crust. We have formulated steady state heat budgets for two volcanically distinct areas in the Lassen region: the large, late...
W.A. Battaglin, L.E. Hay
1996, Environmental Science & Technology (30) 889-896
The effects of 10 sampling strategies on estimates of annual mean concentrations of the herbicides atrazine, alachlor, and cyanazine in selected midwestern rivers were tested. The accuracy of the strategies was computed by comparing time-weighted annual mean herbicide concentrations calculated from water samples collected from 17 locations on midwestern rivers,...
Craig D. Allen, R. Touchan, Thomas W. Swetnam
Fraser Goff, Barry S. Kues, Margaret Anne Rogers, Les D. McFadden, Jamie N. Gardner, editor(s)
1996, Conference Paper, New Mexico Geological Society Fall Field Conference Guidebook - 47: Jemez Mountains Region
No abstract available....
Alan Kolok, James N. Huckins, Jimmie D. Petty, James T. Oris
1996, Environmental Toxicology and Chemistry (15) 1752-1759
The objective of this study was to determine whether sediment ingestion or water ventilation was the primary route of uptake for benzo[a]pyrene (BaP) in the gizzard shad (Dorosoma cepedianum), a detritivorous fish. Two experiments were conducted in which fish were exposed to sediments spiked with 1 μg/g BaP. In the...
Paul A. Hsieh
1996, Ground Water (34) 1082-1089
Ground-water withdrawal from a confined or semiconfined aquifer causes three-dimensional deformation in the pumped aquifer and in adjacent layers (overlying and underlying aquifers and aquitards). In response to the deformation, hydraulic head in the adjacent layers could rise or fall almost immediately after the start of pumping. This deformation-induced effect...
S. E. Hough, E. H. Field
1996, Bulletin of the Seismological Society of America (86) 1724-1732
We present an analysis of the coherence of seismic ground motion recorded on alluvial sediments in the San Fernando Valley, California. Using aftershocks of the 17 January 1994 Mw6.7 earthquake recorded at a quasi-dense array of portable stations, we analyze the coherence of three...
L. E. Schemel, S.W. Hager, D. Childers
J.T. Hollibaugh, editor(s)
1996, Book chapter, San Francisco Bay - the ecosystem
No abstract available....
Scott A Wissinger, G. B. Sparks, G. L. Rouse, W. S. Brown, Heidi Steltzer
1996, Ecology (77) 2421-2430
Comparative data from subalpine wetlands in Colorado indicate that larvae of the limnephilid caddisflies, Asynarchus nigriculus and Limnephilus externus, are reciprocally abundant among habitats–Limnephilus larvae dominate in permanent waters, whereas Asynarchus larvae dominate in temporary basins. The purpose of this paper is to report on field and laboratory experiments that...
Jorge F. Genise, Thomas M. Bown
1996, Ichnos: An International Journal for Plant and Animal Traces (4) 199-217
The systematics of the fossil bee nest ichnogenus Uruguay from the Uruguayan Cretaceous or lower Tertiary is reviewed and two new ichnospecies of a new ichnogenus, Rosellichnus, are proposed for fossil bee nests from the Miocene of the United Arab Emirates and Patagonian Argentina. Uruguay contains U. auroranormae(the ich‐notype) and U. rivasi, which differs from the type ichnospecies in...
W.M. Andrews, J.C. Hower, J.C. Ferm, S.D. Evans, N.S. Sirek, M. Warrell, C.F. Eble
1996, International Journal of Coal Geology (31) 151-167
This study investigated the Taylor coal bed in Johnson and Martin counties, eastern Kentucky, using field and petrographic techniques to develop a depositional model of the coal bed. Petrography and chemistry of the coal bed were examined. Multiple benches of the...
K. E. Juracek, C. V. Hansen, C.M. Logan
1996, Open-File Report 96-613
C.M. Zdanowicz, F.A. Michel, W.W. Shilts
1996, Annals of Glaciology (22) 107-113
Glaciers on southwestern Bylot Island in the Canadian Arctic flow from an alpine setting in high-grade crystalline Archean terrane, on to coastal lowlands underlain by clastic sedimentary strata of Cretaceous to Tertiary age. We have used the contrasting mineralogy of the substrate as a tool to study subglacial entrainment and...