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Page 4237, results 105901 - 105925

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Chlamydial-caused infectious keratoconjunctivitis in bighorn sheep of Yellowstone National Park
Mary Meagher, William J. Quinn, Larry Stackhouse
1992, Journal of Wildlife Diseases (28) 171-176
An epizootic of infectious keratoconjuctivitis occurred in bighorn sheep (Ovis canadensis) in Yellowstone National Park during the winter of 1981-82. The causative organism was identified as Chlamydia sp. Mortality related to the epizootic was approximately 60% of an estimated 500 bighorn sheep in the northern range population....
Seismicity and geometry of a 110‐km‐long blind thrust fault 1. The 1985 Kettleman Hills, California, earthquake
E. Ekstrand, Ross Stein, J. P. Eaton, D. Eberhart-Phillips
1992, Journal of Geophysical Research B: Solid Earth (97) 4843-4864
The August 4, 1985, Kettleman Hills earthquake was the third in a sequence of moderate shocks to occur beneath the northern half of a 110‐km‐long fold chain bounding the eastern California Coast Ranges. The 1982 MW =5.4 New Idria, 1983 MW=6.5 Coalinga, and 1985 MW=6.1 Kettleman Hills events define a southward...
Upper-mantle seismic discontinuities and the thermal structure of subduction zones
J.E. Vidale, H.M. Benz
1992, Nature (356) 678-683
The precise depths at which seismic velocities change abruptly in the upper mantle are revealed by the analysis of data from hundreds of seismometers across the western United States. The boundary near 410km depth is locally elevated, that near 660 km depressed. The depths of these boundaries, which mark phase...
Identification of viral hemorrhagic septicemia virus isolated from Pacific cod Gadus macrocephalus in Prince William Sound Alaska, USA
T.R. Meyers, J. Sullivan, E. Emmenegger, J. Follett, S. Short, W.N. Batts, J. R. Winton
1992, Diseases of Aquatic Organisms (12) 167-175
Ulcerative slun tissues from 2 Pacific cod Gadus rnacrocephalus caught in Prince William Sound, Alaska, USA, were examined for virus by Fish Pathology staff within the F.R.E.D. Division of the Alaska Department of Fish and Game. Six days after inoculation of Epitheliorna papulosum cyprini (EPC) cells at 14"C, diffuse rounding...
Revised budget for the oceanic uptake of anthropogenic carbon dioxide
J.L. Sarmiento, E.T. Sundquist
1992, Nature (356) 589-593
Tracer-calibrated models of the total uptake of anthropogenic CO2 by the world's oceans give estimates of about 2 gigatonnes carbon per year1, significantly larger than a recent estimate2 of 0.3-0.8 Gt C yr-1 for the synoptic air-to-sea CO2 influx. Although both estimates require that the global CO2 budget must be balanced by a large unknown...
A model for the generation of two-dimensional surf beat
Jeffrey H. List
1992, Journal of Geophysical Research C: Oceans (97) 5623-5635
A finite difference model predicting group-forced long waves in the nearshore is constructed with two interacting parts: an incident wave model providing time-varying radiation stress gradients across the nearshore, and a long-wave model which solves the equations of motion for the forcing imposed by the incident waves. Both shallow water...
A mid-Permian chert event: Widespread deposition of biogenic siliceous sediments in coastal, island arc and oceanic basins
B.L. Murchey, D. L. Jones
1992, Palaeogeography, Palaeoclimatology, Palaeoecology (96) 161-174
Radiolarian and conodont of Permian siliceous rocks from twenty-three areas in teh the circum-Pacific and Mediterranean regions reveal a widespread Permian Chert Event during the middle Leonardian to Wordian. Radiolarian- and (or) sponge spicule-rich siliceous sediments accumulated beneath high productivity zones in coastal, island arc and oceanic basins. Most of...
Application of continuum models to deformation of the Aleutian Island Arc
Eric L. Geist, David W. Scholl
1992, Journal of Geophysical Research Solid Earth (97) 4953-4967
Continuum models were constructed to describe large‐scale deformation of the Aleutian Island Arc over the past 5 m.y. These models consider the island arc as a continuum in the horizontal plane with the velocity boundary condition at the Pacific edge stated as a fraction of Pacific plate convergence transferred to...
Limitations of quantitative analysis of deep crustal seismic reflection data: Examples from GLIMPCE
Myung W. Lee, Deborah R. Hutchinson
1992, Journal of Geophysical Research B: Solid Earth (97) 4705-4719
Amplitude preservation in seismic reflection data can be obtained by a relative true amplitude (RTA) processing technique in which the relative strength of reflection amplitudes is preserved vertically as well as horizontally, after compensating for amplitude distortion by near-surface effects and propagation effects. Quantitative analysis of relative true amplitudes of...
The relationship between pH and community structure of invertebrates in streams of the Shenandoah National Park, Virginia
Richard S. Feldman, Edward F. Connor
1992, Freshwater Biology (27) 261-276
1. A replicated natural experiment was used to assess the influence of pH and low alkalinity on abundance and richness of invertebrate families in streams draining catchments that receive acid deposition. Individual streams were used as the unit of replication, allowing conclusions to refer to a class of streams rather...
A basalt trigger for the 1991 eruptions of Pinatubo volcano?
J.S. Pallister, R. Hoblitt, A.G. Reyes
1992, Nature (356) 426-428
The eruptive products of calc-alkaline volcanos often show evidence for the mixing of basaltic and acid magmas before eruption (see, for example, refs 1, 2). These observations have led to the suggestion3 that the injection of basaltic magma into the base of a magma chamber (or the catastrophic overturn of...
Legal mechanisms for protecting riparian resource values
Berton L. Lamb, Eric Lord
1992, Water Resources Research (28) 965-977
Riparian resources include the borders of rivers, lakes, ponds, and potholes. These border areas are very important for a number of reasons, including stream channel maintenance, flood control, aesthetics, erosion control, fish and wildlife habitat, recreation, and water quality maintenance. These diverse functions are not well protected by law or...
A new radiometric age estimate for the Rotoehu Ash from Mayor Island volcano, New Zealand
C. J. N. Wilson, B. F. Houghton, Marvin A. Lanphere, S.D. Weaver
1992, New Zealand Journal of Geology and Geophysics (35) 371-374
The age of the Rotoehu Ash is estimated as 64 ± 4 ka from whole‐rock K‐Ar age determinations on older and younger lava flows on Mayor Island volcano. This age is compatible with an existing U/Th disequilibrium age of 71 ± 6 ka and both are significantly older than the...
On the characteristics of local geology and their influence on ground motions generated by the Loma Prieta earthquake in the San Francisco Bay region, California
Roger D. Borcherdt, Gary Glassmoyer
1992, Bulletin of the Seismological Society of America (82) 603-641
Strong ground motions recorded at 34 sites in the San Francisco Bay region from the Loma Prieta earthquake show marked variations in characteristics dependent on crustal structure and local geological conditions. Peak horizontal acceleration and velocity inferred for sites underlain by “rock” generally occur on the transverse component of motion....
Sources of nonresponse to the Federal Waterfowl Hunter Questionnaire Survey
Richard J. Barker, Paul H. Geissler, Brett A. Hoover
1992, Journal of Wildlife Management (56) 337-343
Response rates to the Federal Waterfowl Hunter Questionnaire Survey (WHQS) have declined since the 1950's, suggesting that harvest estimates may be biased. Consequently, we investigated reasons for WHQS nonresponse using surveys of waterfowl hunters in Arkansas, California, Louisiana, Minnesota, New Jersey, and Texas. Sampling frames were constructed using lists of...