Teleseismically recorded seismicity before and after the May 7, 1986, Andreanof Islands, Alaska, earthquake
E.R. Engdahl, S. Billington, C. Kisslinger
1989, Journal of Geophysical Research Solid Earth (94) 15481-15498
The May 7, 1986, Andreanof Islands earthquake (Mw 8.0) is the largest event to have occurred in that section of the Aleutian arc since the March 9, 1957, Aleutian Islands earthquake (Mw 8.6). Teleseismically well-recorded earthquakes in the region of the 1986 earthquake are relocated with a plate model and with careful...
New evidence for global tectonic zones on Venus
R.C. Kozak, G. G. Schaber
1989, Geophysical Research Letters (16) 175-178
Venera 15 and 16 spacecraft images show clear evidence of major crustal disruptions on Venus which have been interpreted to indicate crustal divergence. Complementary to the divergent zones are mountain belts that border the continent-like high terrains. The requisite transcurrent motions appear to be manifested as diffuse shear zones. The...
A semiquantitative X-ray diffraction method to determine mineral composition in stream sediments with similar mineralogy
Daniel M. Webster
1989, Environmental Technology Letters (10) 833-844
A semiquantitative X‐ray diffraction procedure has been developed that can be used to acquire reproducible mineralogic data from geographically unrelated stream‐sediment samples having similar mineralogy. Weight percentages for quartz, total‐feldspar, and total‐clay can be determined by direct comparison of intensities with standard‐mineral mixtures of known weight percent. Matrix effects and...
Artificial recharge to the Floridan aquifer system, Orlando Area, Central Florida
E. R. German, L. A. Bradner
1989, Conference Paper
Approximately 400 drainage wells exist in Orange County, central Florida. The rate of recharge through drainage wells is limited by the rate of surface flow to the wells; the hydraulic properties of weirs, overflow pipes, and well casings; or the water level above the top of the casing. The rate...
A high-resolution seismic reflection/refraction study of the Chugach-Peninsular terrane boundary, southern Alaska
T.M. Brocher, M. A. Fisher, E.L. Geist, N.I. Christensen
1989, Journal of Geophysical Research Solid Earth (94) 4441-4455
We present results from a high-resolution seismic refraction analysis of the shallow (approximately 2 km) crustal structure along the 107-km-long Trans-Alaska Crustal Transect Chugach reflection line in southern Alaska and a comparison with laboratory measurements of field samples. The refraction analysis includes the two-dimensional interpretation of several thousand first- and...
Back-arc with frontal-arc component origin of Triassic Karmutsen basalt, British Columbia, Canada
F. Barker, Brown A. Sutherland, J. R. Budahn, George Plafker
1989, Chemical Geology (75) 81-102
The largely basaltic, ???4.5-6.2-km-thick, Middle to Upper Triassic Karmutsen Formation is a prominent part of the Wrangellian sequence. Twelve analyses of major and minor elements of representative samples of pillowed and massive basalt flows and sills from Queen Charlotte and Vancouver Islands are ferrotholeiites that show a range of 10.2-3.8%...
Reinterpretation of lower Mesozoic rocks on the Chilkat Peninsula, Alaska, as a displaced fragment of Wrangellia
George Plafker, C.D. Blome, Norman J. Silberling
1989, Geology (17) 3-6
The southern Chilkat Peninsula is underlain by low-grade metamorphic rocks consisting of a thick unit of greenstone, in part of Carnian age, that is locally overlain by an attenuated section of calcareous sedimentary rocks and chart of latest Carnian to late Norian age...
Thermal infrared (2.5-13.5 μm) spectroscopic remote sensing of igneous rock types on particulate planetary surfaces
John W. Salisbury, Louis S. Walter
1989, Journal of Geophysical Research (94) 9192-9202
Fundamental molecular vibration bands are significantly diminished by scattering. Thus such bands in spectra of fine particulate regoliths (i.e., dominated by <5-μm particles), or regoliths displaying a similar scale of porosity, are difficult to use for mineralogical or rock type identification. Consequently, other spectral features have been sought that may...
Subsurface temperatures and geothermal gradients on the North Slope, Alaska
Timothy S. Collett, Kenneth J. Bird, Leslie B. Magoon
1989, Society of Petroleum Engineers of AIME, (Paper) SPE
Geothermal gradients as interpreted from a series of high-resolution stabilized well-bore-temperature surveys from 46 North Slope, Alaska, wells vary laterally and vertically throughout the near-surface sediment (0-2,000 m). The data from these surveys have been used in conjunction with depths of ice-bearing permafrost, as interpreted from 102 well logs, to...
A 107-year-old coral from Florida Bay: barometer of natural and man- induced catastrophes?
J.H. Hudson, G.V.N. Powell, M. B. Robblee, T. J. Smith III
1989, Bulletin of Marine Science (44) 283-291
The 107-yr growth history of a massive coral Solenastrea bournoni from Florida Bay was reconstructed with X-ray imagery from a single 4 in. diameter (10 cm) core that penetrated the exact epicenter of the 95.3 cm high colony. Growth increments totalled 952.9 mm, averaging 8.9 mm/yr over the life of...
Changes in saltwater intrusion in the Biscayne aquifer, Hialeah-Miami Springs area, Dade County, Florida
Howard Klein, Karl W. Ratzlaff
1989, Water-Resources Investigations Report 87-4249
A lobe of salty groundwater that had intruded the Hialeah-Miami Springs area municipal well field, adjacent to the Miami and Tamiami Canals in Dade County, Florida, was stabilized after flow-regulation structures were installed in the canals in 1946. However, in 1971, the saltwater began to readvance toward the center of...
Brain cholinesterase activity of nestling great egrets snowy egrets and black-crowned night-herons
T. W. Custer, H. M. Ohlendorf
1989, Journal of Wildlife Diseases (25) 359-363
Inhibition of brain cholinesterase (ChE) activity in birds is often used to diagnose exposure or death from organophosphorus or carbamate pesticides. Brain ChE activity in the young of altricial species increases with age; however, this relationship has only been demonstrated in the European starling (Sturnus vulgaris). Brain ChE activity of...
Upper Jurassic mafic magmatic rocks of the eastern Klamath Mountains, northern California: remnant of a volcanic arc built on young continental crust
M. Brouxel, H. Lapierre, J.-L. Zimmermann
1989, Geology (17) 273-276
Diabasic and gabbroic dikes intruding the lower Paleozoic Trinity Ophiolite in the Lovers Leap section, Klamath Mountains, California, display strong calc-alkalic petrological and geochemical features (occurrence of primary amphiboles, zoned plagioclase phenocrysts and biotite, low TiO2, high incompatible trace-element contents, and light rare...
Reversed-phase thin-layer chromatography of homologs of Antimycin-A and related derivatives
Sharon L. Abidi
1989, Journal of Chromatography (464) 453-458
Using a reversed-phase high-performance liquid chromatographic (HPLC) technique, a mixture of antimycins A was separated into eight hitherto unreported subcomponents, Ala, Alb, A2a, A2b, A3a, A3b, A4a, and A4b. Although a base-line resolution of the known four major antimycins Al, A2, A3, and A4 was readily achieved with mobile phases...
Seismic velocities and attenuation from borehole measurements near the Parkfield prediction zone, Central California
James F. Gibbs, Edward F. Roth
1989, Earthquake Spectra (5) 513-537
Shear (S)- and compressional (P)- wave velocities were measured to a depth of 195 m in a borehole near the San Andreas fault where a recurrence of a moderate Parkfield earthquake is predicted. S-wave velocities determined from orthogonal directions of the S-wave source show velocity differences of approximately 20 percent....
Seasonal reproductive development of Lampsilis cardium, Amblema plicata plicata, and Potamilus alatus
L. E. Holland Bartels, T. W. Kammer
1989, Journal of Freshwater Ecology (5) 87-92
Adult specimens of three species of freshwater mussels common to the upper Mississippi River were examined histologically to determine seasonal patterns of development in gametogenesis and release of glochidia. Full maturation of gonadal materials in Lampsilis cardium (formerly L. ovata ventricosa), a long-term breeder, occurred when ambient river temperatures...
Breeding bird census: 1988 - Kentucky bluegrass prairie: mixed prairie I-V
Douglas H. Johnson
1989, Journal of Field Ornithology (60) 58-60
Abstract has not been submitted...
Breeding canvasbacks: a test of a habitat model
Douglas H. Johnson, M.C. Hammond, T. L. McDonald, C.L. Nustad
1989, Prairie Naturalist (21) 193-202
Schroeder (1984) proposed a habitat suitability model for breeding canvasbacks (Aythya valisineria) based on the size, water regime, and emergent vegetation of wetlands. We evaluated the model with data from surveys of canvasbacks on 2265 wetlands in North Dakota, South Dakota, and Minnesota. The model proved inadequate as a predictor...
Preliminary map of upper Eocene to Holocene volcanic and related rocks of the Cascade Range, Oregon
David R. Sherrod, James G. Smith
1989, Open-File Report 89-14
Since 1979 the Geothermal Research Program of the U.S. Geological Survey has carried out multidisciplinary research in the Cascade Range. The goal of this research is to understand the geology, tectonics, and hydrology of the Cascades in order to characterize and quantify geothermal resource potential. A major goal of the...
Synthesis, spectral, and redox properties of three triply bridged complexes of ruthenium
A. Llobet, M.E. Curry, H. T. Evans, T.J. Meyer
1989, Inorganic Chemistry (28) 3131-3137
No abstract available....
Eustatic and tectonic controls on deposition of hybrid siliciclastic/carbonate basinal cycles: Discussion with examples
James F. Dolan
1989, American Association of Petroleum Geologists Bulletin (73) 1233-1246
Changes in sea level represent one of the dominant controls on basinal sedimentation adjacent to mixed carbonate siliciclastic sediment-source areas. Sedimentary responses to sea level change of the siliciclastic and carbonate components of these hybrid systems commonly result in deposition of alternating siliciclastic and shelf-derived carbonate basinal deposits. Such deposition...
Acute toxicity of selected herbicides and surfactants to larvae of the midge Chironomus riparius
Kevin J. Buhl, Neil L. Faerber
1989, Archives of Environmental Contamination and Toxicology (18) 530-536
The acute toxicities of eight commercial herbicides and two surfactants to early fourth instar larvae of the midgeChironomus riparius were determined under static conditions. The formulated herbicides tested were Eradicane® (EPTC), Fargo® (triallate), Lasso® (alachlor), ME4 Brominal® (bromoxynil), Ramrod® (propachlor), Rodeo® (glyphosate), Sencor®(metribuzin), and Sutan (+)® (butylate); the...
Petrologic constraints on rift-zone processes - Results from episode 1 of the Puu Oo eruption of Kilauea volcano, Hawaii
M.O. Garcia, R.A. Ho, J.M. Rhodes, E.W. Wolfe
1989, Bulletin of Volcanology (52) 81-96
The Puu Oo eruption in the middle of Kilauea volcano's east rift zone provides an excellent opportunity to utilize petrologic constraints to interpret rift-zone processes. Emplacement of a dike began 24 hours before the start of the eruption on 3 January 1983. Seismic and geodetic evidence indicates that the dike...
A system for reconstituting special water qualities for use in chronic toxicity studies
Steven J. Hamilton, Neil L. Faerber, Kevin J. Buhl
1989, Water Research (23) 159-165
A water treatment system and procedure are described that are designed for preparing large quantities of reconstituted water with specific chemical and physical characteristics for use in chronic toxicity studies with fish and invertebrates. Water treatment units produce high-purity water in large quantities for storage in high-density cross-linked polyethylene tanks,...
Effect of climate change on watershed runoff
D.M. Wolock, M. A. Ayers, L.E. Hay, G. J. McCabe Jr.
1989, Conference Paper
This paper examines forecasts of changes in watershed runoff in the Delaware River basin that result from a range of predicted effects of increased atmospheric carbon dioxide (CO2) on future precipitation, temperature, and stomatal resistance of plants. A deterministic hydrologic model, TOPMODEL, was driven with stochastic inputs of temperature and...
