Correlation of Miocene flows of the Columbia River Basalt Group from the central Columbia River Plateau to the coast of Oregon and Washington
Ray E. Wells, R.W. Simpson, R. D. Bentley, Melvin H. Beeson, Margaret T. Mangan, Thomas L. Wright
1989, Book chapter, Volcanism and Tectonism in the Columbia River Flood-Basalt Province, Geological Society of America Special Paper 239
Nearly twenty flows of the Columbia River Basalt Group (CRBG) can be paleomagnetically and chemically correlated westward as far as 500 km from the Columbia Plateau in Washington, through the Columbia Gorge, to the Coast Range of Oregon and Washington. In the Coast Range near Cathlamet, Washington, the CRBG flow...
Use of a new high-speed digital data acquisition system in airborne ice-sounding
David L. Wright, Jerry A. Bradley, Steven M. Hodge
1989, IEEE Transactions on Geoscience and Remote Sensing (27) 561-567
A high-speed digital data acquisition and signal averaging system for borehole, surface, and airborne radio-frequency geophysical measurements was designed and built by the US Geological Survey. The system permits signal averaging at rates high enough to achieve significant signal-to-noise enhancement in profiling, even in airborne applications. The first field use...
Analytical results and sample locality map of stream-sediment and panned-concentrate samples from the El Dorado and Ireteba Peaks Wilderness Study Areas, Clark County, Nevada
John B. McHugh, J. H. Bullock, T. A. Roemer, G.A. Nowlan
1989, Open-File Report 89-22
No abstract available....
Comparative facies formation in selected coal beds of the Powder River Basin
R.W. Stanton, Timothy A. Moore, Peter D. Warwick, S.S. Crowley, Romeo M. Flores
Romeo M. Flores, Peter D. Warwick, Timothy A. Moore, Gary Glass, Archie Smith, Douglas J. Nichols, Jack A. Wolfe, Ronald W. Stanton, Jean Weaver, editor(s)
1989, Conference Paper, Tertiary and Cretaceous coals in the Rocky Mountains region: Casper, Wyoming to Salt Lake City, Utah June 29-July 8, 1989
Petrologic studies of thick coal beds [Warwick, 1985; Moore, 1986; Moore and others, 1986; Moore and others, 1987; Warwick and Stanton, in press], which build on sedimentological interpretations [Flores, this volume] of associated units, provide data to interpret and contrast the varieties of peat formation in the Powder River Basin....
Hydrologic data of the Nashua and Souhegan River basins, Massachusetts
B. P. Hansen, R. A. Brackley, V. A. de Lima
1989, Open-File Report 87-221
No abstract available....
Mechanisms of Cenozoic tectonic rotation, Pacific Northwest Convergent Margin, U.S.A.
Ray E. Wells
1989, Book chapter, Paleomagnetic rotations and continental deformation. NATO ASI Series (C: Mathematical and Physical Sciences)
Large clockwise rotations (15–80°) are characteristic of Cenozoic volcanic and sedimentary rocks along the convergent margin of the northwestern United States. Abundant paleomagnetic data from 62–12 m.y. old rocks in forearc, arc, and backarc regions show that rotation increases with age and with proximity to the coast. Paleomagnetic and structural...
NEIC; the National Earthquake Information Center
R.P. Masse, R.E. Needham
1989, Earthquakes & Volcanoes (USGS) (21) 4-45
Mexico was hit by one of the most devastating earthquakes in its history on September 19, 1985 at 7:18 a.m. MDT time. this earthquake, which was centered about 380 kilometers west-southwest of Mexico City, had a surface-wave magnitude of 8.1. In less than a minute, seismic waves from this earthquake...
Paleomagnetism and tectonic rotation of the lower Miocene Peach Springs Tuff: Colorado Plateau, Arizona, to Barstow, California
Ray E. Wells, John W. Hillhouse
1989, GSA Bulletin (101) 846-863
We have determined remanent magnetization directions of the lower Miocene Peach Springs Tuff at 41 localities in western Arizona and southeastern California. An unusual northeast and shallow magnetization direction confirms the proposed geologic correlation of isolated outcrops of the tuff from the Colorado Plateau to Barstow, California, a distance of...
Transport of microspheres and indigenous bacteria through a sandy aquifer: Results of natural- and forced-gradient tracer experiments
R.W. Harvey, L.H. George, R. L. Smith, D.R. LeBlanc
1989, Environmental Science & Technology (23) 51-56
Transport of indigenous bacteria through sandy aquifer sediments was investigated in forced- and natural-gradient tracer teste. A diverse population of bacteria was collected and concentrated from groundwater at the site, stained with a DNA-specific fluorochrome, and injected back into the aquifer. Included with the injectate were a conservative tracer (Br-...
Active faulting and deformation of the Coalinga anticline as interpreted from three-dimensional velocity structure and seismicity
D. Eberhart-Phillips
1989, Journal of Geophysical Research Solid Earth (94) 15565-15586
This work gives a clear picture of the geometry of aftershock seismicity in a large thrust earthquake. Interpretation of hypocenters and fault plane solutions, from the 1983 Coalinga, Coast Range California, earthquake sequence, in combination with the three-dimensional velocity structure shows that the active faulting beneath the fold primarily consists...
Remarkable isotopic and trace element trends in potassic through sodic Cretaceous plutons of the Yukon-Koyukuk Basin, Alaska, and the nature of the lithosphere beneath the Koyukuk terrane
Joseph G. Arth, Robert E. Criss, Clara C. Zmuda, Nora K. Foley, W. W. Patton Jr., T. P. Miller
1989, Journal of Geophysical Research B: Solid Earth (94) 15957-15968
During the period from 110 to 80 m.y. ago, a 450-km-long magmatic belt was active along the northern margin of Yukon-Koyukuk basin and on eastern Seward Peninsula. The plutons intruded Upper Jurassic(?) and Lower Cretaceous volcanic arc rocks and Cretaceous sedimentary rocks in Yukon-Koyukuk basin and Proterozoic and lower Paleozoic...
Optimal-adaptive filters for modelling spectral shape, site amplification, and source scaling
Erdal Safak
1989, Soil Dynamics and Earthquake Engineering (8) 75-95
Optimal filtering techniques have been used successfully in various areas in science and engineering. They are based on statistical properties of the signal and the noise, and stochastic approximation theory. In addition to filtering, optimal filters can also be used for smoothing, prediction, and system identification. This paper introduces some...
Winter raptor use of the Platte and North Platte River Valleys in south central Nebraska
G.R. Lingle
1989, Prairie Naturalist (21) 1-16
Winter distribution and abundance of raptors were monitored within the Platte and North Platte river valleys. Data were collected along 265 km of census routes along the Platte and North Platte rivers during the winters of 1978-1979 and 1979-1980. Observations recorded during the second winter involved less observation time and...
High velocity anomaly beneath the Deccan volcanic province: Evidence from seismic tomography
H. M. Iyer, V.K. Gaur, S.S. Rai, D.S. Ramesh, C.V.R. Rao, D. Srinagesh, K. Suryaprakasam
1989, Proceedings of the Indian Academy of Sciences - Earth and Planetary Sciences (98) 31-60
Analysis of teleseismic P-wave residuals observed at 15 seismograph stations operated in the Deccan volcanic province (DVP) in west central India points to the existence of a large, deep anomalous region in the upper mantle where the velocity is a few per cent higher than in the surrounding region. The...
Pre-earthquake displacement and triggered displacement on the Imperial fault associated with the Superstition Hills earthquake of 24 November 1987
R. V. Sharp
1989, Bulletin of the Seismological Society of America (79) 466-479
Two right-lateral slip events, about 3 weeks apart in November 1987, broke the surface discontinuously along probably similar, nearly 20 km lengths of the northern Imperial fault. The first displacement, at about the beginning of November, was accompanied by a surface tilt representing deep vertical motion or distributed strain. This...
The geology, botany and chemistry of selected peat-forming environments from temperate and tropical latitudes
C. C. Cameron, J.S. Esterle, C.A. Palmer
1989, International Journal of Coal Geology (12) 105-156
Peat has been studied in several geologic settings: (1) glaciated terrain in cold temperate Maine and Minnesota, U.S.A.; (2) an island in the Atlantic Ocean off the coast of Maine, where sea level is rising; (3) the warm temperate U.S. Atlantic...
Characterization of coal-derived hydrocarbons and source-rock potential of coal beds, San Juan Basin, New Mexico and Colorado, U.S.A.
D. D. Rice, J.L. Clayton, M. J. Pawlewicz
1989, International Journal of Coal Geology (13) 597-626
Coal beds are considered to be a major source of nonassociated gas in the Rocky Mountain basins of the United States. In the San Juan basin of northwestern New Mexico and southwestern Colorado, significant quantities of natural gas are being produced...
Triumph of the Voyager mission
R. A. Kerr
1989, Earthquakes & Volcanoes (USGS) (21) 147-149
It had been a long, productive trip. Launched in 1977, the two Voyager spacecraft had visited three giant planets, a dozen major Moons, three ring systems with thousands of rings composed of a myriad of tiny Moonlets. The spacecraft had returned 5 trillion bits of data and over 100,000 photographs....
Flow and hydraulic characteristics of the Knik-Matanuska River estuary, Cook Inlet, southcentral Alaska
S. W. Lipscomb
1989, Water-Resources Investigations Report 89-4064
A study of the riverine-estuarine reach of the Knik and Matanuska Rivers provided flow and hydraulic data for use in the design of additional bridges over the rivers. Hydraulic analysis is complicated because: (1) the lower reaches of the rivers merge in a complex system of interconnected channels; and (2)...
Gas phase axial dispersion in a packed column oxygen absorber
Barnaby J. Watten, Claude E. Boyd
1989, Aquacultural Engineering (8) 421-434
Gas phase axial dispersion was characterized within an enclosed packed column receiving oxygen and water under counter-current flow conditions. Steady-state gas phase profiles (longitudinal) were measured during a series of 90 column runs in which, at each of three bed depths (0·362, 0·699, and 1·041 m), all combinations of the...
Recruitment failure in American avocets and black-necked stilts nesting at Kesterson Reservoir, California, 1984-1985
M.L. Williams, R. L. Hothem, H. M. Ohlendorf
1989, Condor (91) 797-802
We evaluated recruitment by American Avocets (Recurvirostra americana) and Black-necked Stilts (Himantopus mexicanus) in 1984 and 1985 at the selenium-contaminated Kesterson Reservoir and at a nearby reference site, the Volta Wildlife Area, both in western Merced County, California. Nests were monitored to determine their outcomes, including hatching success, and...
Winter survival of female American black ducks on the Atlantic coast
Michael J. Conroy, Gary R. Costanzo, Daniel B. Stotts
1989, Journal of Wildlife Management (53) 99-109
We used radio telemetry to monitor the winter survival and cause-specific mortality of 227 female American black ducks (Anas rubripes) captured in New Jersey and Virginia, 1983-85. Mean survival rate for 19 December-15 February was 0.65. Survival from hunting and nonhunting risk was 0.84 and 0.78, respectively. Causes of nonhunting...
Survival analysis in telemetry studies: The staggered entry design
Kenneth H. Pollock, Scott R. Winterstein, Christine M. Bunck, Paul D. Curtis
1989, Journal of Wildlife Management (53) 7-15
The estimation of survival distributions for radio-tagged animals is important to wildlife ecologists. Allowance must be made for animals being lost (or censored) due to radio failure, radio loss, or emigration of the animal from the study area. The Kaplan-Meier procedure (Kaplan and Meier 1958), widely used in medical studies...
Early Cretaceous vein-related garnet granulite in Fiordland, southwest New Zealand: a case for infiltration of mantle-derived CO2-rich fluids
J.Y. Bradshaw
1989, Journal of Geology (97) 697-717
Regionally extensive two-pyroxene granulite facies orthogneisses of Early Cretaceous age in Fiordland, southwest New Zealand, are criss-crossed by garnet-bearing feldspathic veins (and dikes) having associated marginal reaction zones of garnet granulite. The two-pyroxene granulites resulted from fluid-absent meta-morphism of a suite of...
Undiscovered lode tin resources of the Seward Peninsula, Alaska
B.L. Reed, W. D. Menzie, M. McDermott, D. H. Root, W. Scott, L.J. Drew
1989, Economic Geology (84) 1936-1947
The United States is a net importer of many important minerals, including tin. Consumption of primary tin in the United States is about 36,000 metric tons per year. Identified U.S. tin resources consist of about 40,000 metric tons. Although such figures provide insight about vulnerability to supply disruptions in the...
