Accumulation of 14C-naphthalene in the tissues of redhead ducks fed oil-contaminated crayfish
I. Barry Tarshis, Barnett A. Rattner
1982, Archives of Environmental Contamination and Toxicology (11) 155-159
Crayfish, artificially contaminated with14C-naphthalene-5% water-soluble fraction of No. 2 fuel oil, were force-fed to one-year-old redhead ducks to determine the accumulation of petroleum hydrocarbons. The relative distribution of carbon-14 activity in the gall bladder containing bile, and fat were similar, and significantly greater (P < 0.05) than the activity in...
Ingestion of petroleum by breeding mallard ducks: Some effects on neonatal progeny
J. Gorsline, W. N. Holmes
1982, Archives of Environmental Contamination and Toxicology (11) 147-153
Breeding female mallard ducks consuming petroleum-contaminated food show significant induced increases in the naphthalene-metabolizing properties of microsomes prepared from their livers. Food contaminated with South Louisiana crude oil was more potent than food contaminated with similar concentrations of Prudhoe Bay crude oil and in each instance food contaminated with 3%...
Cenozoic silicoflagellates from offshore Guatemala, Deep Sea Drilling Project Site 495
David Bukry
1982, Initial Reports of the D.S.D.P. (67) 425-445
Diverse lower Miocene to Pleistocene silicoflagellate assemblages occur at Deep Sea Drilling Project Site 495, but many samples are dominated by one or two taxa. Low-latitude zonation can be applied throughout. Cool-indicating Distephanus speculum s. ampl. is only abundant in the upper Miocene; however, relative paleotemperature values (Ts) suggest temperature...
A late Pleistocene glacial chronology for the southern Brooks Range: Stratigraphic record and regional significance
T. D. Hamilton
1982, GSA Bulletin (93) 700-716
Radiocarbon dates from 11 measured sections in the Koyukuk region provide a chronology of the last Pleistocene glaciation. Glaciers were advancing strongly by 24,000 yr ago; they built moraines near the south flank of the Brooks Range, retreated briefly about 22,000 to 20,000 yr B.P., then readvanced at least one...
Ancient plate boundaries in the Bering Sea region
M. S. Marlow, Alan K. Cooper, David W. Scholl, H. McLean
1982, Geological Society, London, Special Publications (10) 201-211
Plate tectonic models of the Bering Sea suggest that the abyssal Bering Sea Basin is underlain by oceanic crust, a supposition supported by refraction and magnetic data. The oceanic crust is thought to be a remnant of the Kula(?) plate that was isolated within what is now the Bering...
Changes in vegetation structure in seeded nesting cover in the prairie pothole region
K.F. Higgins, W.T. Barker
1982, Special Scientific Report - Wildlife 242
A sample of 365 stands of seeded nesting cover (mixtures of cool-season grasses and legumes) was studied in the glaciated prairie pothole region during 1977-79. Measurements of species composition, canopy cover, plant height, and visual obstruction values differed with stand age but only in a general way when results from...
Introduction: seismology and earthquake engineering in Mexico and Central and South America.
A. F. Espinosa
1982, Earthquake Information Bulletin (USGS) (14) 4-6
The results from seismological studies that are used by the engineering community are just one of the benefits obtained from research aimed at mitigating the earthquake hazard. In this issue of Earthquake Information Bulletin current programs in seismology and earthquake engineering, seismic networks, future plans and some of the cooperative...
Geometry of a mapping satellite.
J.P. Snyder
1982, Photogrammetric Engineering and Remote Sensing (48) 1593-1602
The proposed mapping satellite Mapsat is to consist of fixed fore, vertical, and aft linear detector arrays, any two of which may be used simultaneously to obtain digital images for one- dimensional stereo correlation. The satellite attitude may be varied according to Fourier series to enable a given detector on...
Environmental implications of test-to-substrate attachment among some modern sublittoral foraminifera
C. Wylie Poag
1982, Geological Society of America Bulletin (93) 252-268
Topographic highs on the outer continental shelf of New Jersey are sites for the concentration of three species of attached calcareous benthic foraminifera. Elphidium subarcticum Cushman, normally considered a vagrant species, cements itself by an organic film to one or more quartz grains. Webbinella concave (Williamson) attaches to quartz grains...
The UThPb age of equilibrated L chondrites and a solution to the excess radiogenic Pb problem in chondrites
D.M. Unruh
1982, Earth and Planetary Science Letters (58) 75-94
U, Th, and Pb analyses of whole-rock and troilite separates from seven L chondrites suggest that the excess radiogenic Pb relative to U and the large variations in PbPb model ages commonly observed in chondritic meteorites are largely due to terrestrial Pb contamination induced prior to...
Biostratigraphy and structural setting of the Permian Coyote Butte Formation of central Oregon
B. R. Wardlaw, M.K. Nestell, J.T. Dutro Jr.
1982, Geology (10) 13-16
Larger isolated outcrops of the limestones of the Coyote Butte Formation consistently contain younger over older faunas that range through most of the Leonardian Series of the Early Permian. The outcrops of the Coyote Butte Formation are interpreted as right-side up blocks probably...
Leachability of uranium and other elements from freshly erupted volcanic ash
D. B. Smith, R. A. Zielinski, W.I. Rose Jr.
1982, Journal of Volcanology and Geothermal Research (13) 1-30
A study of leaching of freshly erupted basaltic and dacitic air-fall ash and bomb fragment samples, unaffected by rain, shows that glass dissolution is the dominant process by which uranium is initially mobilized from air-fall volcanic ash. Si, Li, and V are also preferentially mobilized by glass dissolution. Gaseous transfer...
Lead and strontium isotopes and related trace elements as genetic tracers in the Upper Cenozoic rhyolite-basalt association of the Yellowstone Plateau volcanic field
B. R. Doe, W.P. Leeman, R.L. Christiansen, C. E. Hedge
1982, Journal of Geophysical Research Solid Earth (87) 4785-4806
Supported by various field geologic and petrologic data, the contents of Pb, U, Th, Rb, and Sr and the isotopic compositions of Pb and Sr for upper Cenozoic volcanic rocks of the Yellowstone Plateau volcanic field are consistent with the hypothesis of derivation of the basaltic and rhyolitic magmas by...
Laboratory measurements of reservoir rock from the Geysers geothermal field, California
D.A. Lockner, R. Summers, D. Moore, J.D. Byerlee
1982, International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts (19) 65-80
Rock samples taken from two outcrops, as well as rare cores from three well bores at the Geysers geothermal field, California, were tested at temperatures and pressures similar to those found in the geothermal field. Both intact and 30?? sawcut cylinders were deformed at confining pressures of 200-1000 bars, pore...
Rapid intrusion of magma into wet rock: Groundwater flow due to pore pressure increases
P.T. Delaney
1982, Journal of Geophysical Research Solid Earth (87) 7739-7756
Analytical and numerical solutions are developed to simulate the pressurization, expansion, and flow of groundwater contained within saturated, intact host rocks subject to sudden heating from the planar surface of an igneous intrusion. For most rocks, water diffuses more rapidly than heat, assuring that groundwater is not heated along a...
A population model of the lizard Uta stansburiana, in southern Nevada
Frederick B. Turner, Phil A. Medica, K. W. Bridges, R. I. Jennrich
1982, Ecological Monographs (52) 243-259
Population densities, reproduction, and survival of the lizard Uta stansburiana were measured at the Nevada Test Site in southern Nevada, USA, between 1964 and 1974. These data were used to develop a model of the population dynamics of this species. Results of irrigation experiments in 0.4—ha enclosures near Mercury, Nevada,...
Formation and interpretation of dilatant echelon cracks
D. D. Pollard, P. Segall, P.T. Delaney
1982, Geological Society of America Bulletin (93) 1291-1303
The relative displacements of the walls of many veins, joints, and dikes demonstrate that these structures are dilatant cracks. We infer that dilatant cracks propagate in a principal stress plane, normal to the maximum tensile or least compressive stress. Arrays of echelon crack...
Huge landslide blocks in the growth of piton de la fournaise, La réunion, and Kilauea volcano, Hawaii
Wendell A. Duffield, Laurent Stieltjes, Jacques Varet
1982, Journal of Volcanology and Geothermal Research (12) 147-160
Piton de la Fournaise, on the island of La Réunion, and Kilauea volcano, on the island of Hawaii, are active, basaltic shield volcanoes growing on the flanks of much larger shield volcanoes in intraplate tectonic environments. Past studies have shown that the average rate of magma production and the chemistry...
Miocene volcanism and deformation in the western Cordillera and high plateaus of south-central Peru
E.H. McKee, D. C. Noble
1982, Geological Society of America Bulletin (93) 657-662
New radiometric ages on tuffs from south-central Peru support the postulated flare-up of volcanic activity during early Miocene time. In the region of Huancavelica, Julcani, and Lircay, lower Miocene rocks lie on folded strata of pre-Cenozoic age; the absence of units of Eocene...
Estimation of earthquake source parameters by the inversion of waveform data: synthetic waveforms
S.A. Sipkin
1982, Physics of the Earth and Planetary Interiors (30) 242-259
Two methods are presented for the recovery of a time-dependent moment-tensor source from waveform data. One procedure utilizes multichannel signal-enhancement theory; in the other a multichannel vector-deconvolution approach, developed by Oldenburg (1982) and based on Backus-Gilbert inverse theory, is used. These methods have the advantage of being extremely flexible; both...
Chemical and light-stable isotope characteristics of waters from the Raft River geothermal area and environs, Cassia County, Idaho; Box Elder County, Utah
M. Nathenson, N.L. Nehring, E. G. Crosthwaite, R.S. Harmon, C. Janik, J. Borthwick
1982, Geothermics (11) 215-237
Chemical and light-stable isotope data are presented for water samples from the Raft River geothermal area and environs. On the basis of chemical character, as defined by a trilinear plot of per cent milliequivalents, and light-stable isotope data, the waters in the geothermal area can be divided into waters that...
Nutrient exchange across the sediment-water interface in the Potomac River estuary
E. Callender, Douglas E. Hammond
1982, Estuarine, Coastal and Shelf Science (15) 395-413
The flux of ammonia, phosphate, silica and radon-222 from Potomac tidal river and estuary sediments is controlled by processes occurring at the sediment-water interface and within surficial sediment. Calculated diffusive fluxes range between 0·6 and 6·5 mmol m−2 day−1 for ammonia, 0·020 and 0·30 mmol m−2 day−1 for phosphate, and 1·3 and 3·8 mmol...
Computation with physical values from Landsat digital data
C.J. Robinove
1982, Photogrammetric Engineering and Remote Sensing (48) 781-784
Landsat digital images are commonly analyzed by using the digital numbers for each pixel recorded on a computer-compatible magnetic tape. Although this procedure may be satisfactory when only a single, internally consistent image is used, the procedure may produce incorrect results if more than one image is used for analysis...
Simulations of seabird damage and recovery from oilspills in the northern Gulf of Alaska.
W.B. Samuels, K.J. Lanfear
1982, Journal of Environmental Management (15) 169-182
If an oilspill contacts a colony of glaucous-winged gulls Larus hyperboreus, reducing the population by 50%, the population is expected to recover to its pre-spill level in c.20 yr. For common murres Uria aalge, this same situation yields a recovery time of c.70 yr. Assuming that oil is found in...
Applications of Landsat imagery to problems of petroleum exploration in Qaidam Basin, China
G. B. Bailey, P. D. Anderson
1982, American Association of Petroleum Geologists Bulletin (66) 1348-1354
Tertiary and Quaternary nonmarine, petroleum-bearing sedimentary rocks in the Qaidam basin of remote western China have been extensively deformed by compressive forces. These forces created many folds which are current targets of Chinese exploration programs. Manual techniques of image analysis and interpretation were applied to computer-enhanced Landsat images of the...
