Limnocythere bradburyi n.sp.: a modern ostracode from central Mexico and a possible Quaternary paleoclimatic indicator
R. M. Forester
1985, Journal of Paleontology (59) 8-20
Limnocythere bradburyi is a new species of nonmarine ostracode that is living in several lakes in the central Mexican Plateau. These lakes are shallow, turbid, and pan-shaped, having relatively unstable and fluid substrates. Water levels of these lakes are high in the summer and low or dry in the winter....
Map of Antelope Valley-East Kern Water Agency area, California, showing ground-water subunits and areas, location of wells, and lines of equal depth to water for spring 1983
W. R. Moyle Jr., Florence M. Glenn
1985, Open-File Report 84-726
No abstract available....
40Ar/39Ar and K-Ar data bearing on the metamorphic and tectonic history of western New England
J. F. Sutter, N. M. Ratcliffe, S.B. Mukasa
1985, Geological Society of America Bulletin (96) 123-136
40Ar/39Ar ages of coexisting biotite and hornblende from Proterozoic Y gneisses of the Berkshire and Green Mountain massifs, as well as 40Ar/39Ar and K-Ar mineral and whole-rock ages from Paleozoic metamorphic rocks, suggest that the thermal peak for the dominant metamorphic recrystallization in western New England occurred 465 ± 5 m.y....
Distribution of copper in heavy-mineral-concentrate samples from the Charlotte 1° x 2° quadrangle, North Carolina and South Carolina
W. R. Griffitts, J. W. Whitlow, K.A. Duttweiler, D. F. Siems, Theodore Botinelly
1985, Open-File Report 84-843-B
No abstract available....
Distribution and food habits of young-of-the-year fishes in a backwater lake of the upper Mississippi River
L. E. Holland, M.L. Huston
1985, Journal of Freshwater Ecology (3) 81-91
The distribution patterns and food habits of young-of-the-year (YOY) fishes in a lentic area adjacent to the main channel of Pool 7 of the upper Mississippi River were studied. Habitats sampled grouped distinctly based on percent composition and abundance of YOY fishes with those having submergent vegetation dominated...
Element mobility studies of two drill-cores from the Götemar Granite (Kråkemåla test site), southeast Sweden
John A.T. Smellie, John S. Stuckless
1985, Chemical Geology (51) 55-78
A pilot study was carried out on two relatively deep drill-cores (∼ 600 m) from the Götemar Granite massif in S.E. Sweden. This granite is typical of the 1400-Ma anorogenic granites of the northern hemisphere. Samples from representative, unfractured parts of the cores, together with four samples taken along...
Algorithm to reduce approximation error from the complex-variable boundary-element method applied to soil freezing.
T. V. Hromadka II, G. L. Guymon
1985, Numerical heat transfer (8) 115-130
An algorithm is presented for the numerical solution of the Laplace equation boundary-value problem, which is assumed to apply to soil freezing or thawing. The Laplace equation is numerically approximated by the complex-variable boundary-element method. The algorithm aids in reducing integrated relative error by providing a true measure of modeling...
Organochlorine concentrations in prefledging common terns Sterna hirundo at three Rhode Island USA colonies
T. W. Custer, C.M. Bunck, C.L. Stafford
1985, Colonial Waterbirds (8) 150-154
Concentrations of DDE, polychlorinated biphenyls (PCBs), and polychlorinated diphenyl ethers (PCDPEs) in carcasses of prefledging Common Terns (Sterna hirundo) at three Rhode Island colonies support the hypothesis that local contamination is responsible for among-colony differences observed in eggs in an earlier study. The highest concentrations of DDE and PCBs (mean=0.24...
Petrology and tectonic significance of augen gneiss from a belt of Mississippian granitoids in the Yukon-Tanana terrane, east- central Alaska
Cynthia Dusel-Bacon, John N. Aleinikoff
1985, Geological Society of America Bulletin (96) 411-425
An approximately E-W-trending belt of porphyritic peraluminous granitic rocks, metamorphosed and deformed to augen gneiss, is exposed for 400 km across the Yukon-Tanana terrain. Chemical, textural, and isotopic data from large augen-gneiss bodies indicate that these bodies originated as early Mississippian granitic rocks that assimilated, or were anatectically derived from,...
Some mineral stability relations in the system CaO MgO SiO2 H2O HCl
R.W. Luce, G.L. Cygan, J.J. Hemley, W. M. d’Angelo
1985, Geochimica et Cosmochimica Acta (49) 525-538
Mineral-aqueous solution equilibria for the assemblages talc-quartz, tremolite-talc-quartz, diopside-tremolite-quartz, wollastonite-diopside-quartz and wollastonite-quartz have been studied at 2 kb total pressure, 500° to 700°C and chloride concentrations from 0.03 to 6.0 molal. Most work was at 1 m chloride. Both buffered and unbuffered data were obtained and a recalibration of the...
Observations on twinning in the sea lamprey (Petromyzon marinus) in the laboratory
Lee H. Hanson
1985, Journal of Great Lakes Research (11) 549-551
Forty-five sets of separate, normal twins were produced from four portions of the eggs from one female sea lamprey (Petromyzon marinus) each fertilized by a different male. The percentage of twinning in the different groups of embryos ranged from 1.0 to...
Nonpoint-source discharges and water quality of the Elk Creek basin, west-central Wisconsin
S. J. Field
1985, Water-Resources Investigations Report 84-4094
The Elk Creek basin in west-central Wisconsin was studied during the 1980 water year to define the water quality in relation to streamflow. Agricultural nonpoint-source discharges were suspected of contributing significantly to degraded water quality. Two water quality and streamflow gaging stations were established--one on Elk Creek near Independence and...
Invertebrate colonization rates in the tailwater of a Kentucky flood-control reservoir
W.D. Swink, J.F. Novotny
1985, Journal of Freshwater Ecology (3) 27-34
Invertebrate colonization on newly introduced rock substrates was examined from July through October 1982 in the tailwater of Barren River Lake, Kentucky. Chironomidae, the dominant taxon of benthic insects, reached full colonization by day 14. Colonization by Oligochaeta, the other major invertebrate taxon, was not completed by the end...
Determination of carbonate carbon in geological materials by coulometric titration
E.E. Engleman, L. L. Jackson, D. R. Norton
1985, Chemical Geology (53) 125-128
A coulometric titration is used for the determination of carbonate carbon in geological materials. Carbon dioxide is evolved from the sample by the addition of 2 M perchloric acid, with heating, and is determined by automated coulometric titration. The coulometric titration showed improved speed and precision with comparable accuracy to...
Bottom current and sediment transport on San Pedro Shelf, California
David E. Drake, David A. Cacchione, Herman A. Karl
1985, Journal of Sedimentary Research (55) 15-28
GEOPROBE (Geological Processes Bottom Environmental) tripods were used to measure bottom currents, pressure, and light transmission and scattering and to obtain time-series photographs of the sea floor at depths of 23 m and 67 m on San Pedro shelf between 18 April and 6 June 1978. Winds were light (<...
Ferromanganese crusts from Necker Ridge, Horizon Guyot and S.P. Lee Guyot: Geological considerations
James R. Hein, Frank T. Manheim, William C. Schwab, Alice S. Davis
1985, Marine Geology (69) 25-54
Necker Ridge, Horizon Guyot and S.P. Lee Guyot in the Central Pacific were sampled, seismically surveyed, and photographed by bottom cameras in order to better understand the distribution, origin, and evolution of ferromanganese crusts. Necker Ridge is over 600 km long with a rugged crest, pods of sediment to 146...
ROLE OF X-RAY FLUORESCENCE IN A MODERN GEOCHEMICAL LABORATORY.
Joseph E. Taggart
1985, Conference Paper, Advances in X-Ray Analysis
Because modern geochemical laboratories can seldom have all new analytical equipment, it is clear that priorities must be assigned and choices made when selecting each new instrument. X-ray fluorescence (XRF) spectroscopy has come to play a vital role in this environment largely because it is a dependable, multielement, rapid method...
TEMPERATURE VARIATION WITH TIME IN A PERENNIALLY BOILING WELL IN THE LONG VALLEY CALDERA, MONO COUNTY, CALIFORNIA; OBSERVATIONS IN CHANCE NO. 1 (1976-1983).
W.H. Diment, T. C. Urban, Manuel Nathenson
1985, Conference Paper, Transactions - Geothermal Resources Council
Chance No. 1 was drilled to a depth of 245. 4 m and cased to a depth of 72. 2 m in 1961. Temperature logs were obtained in 1976, 1982, and 1983, with the casing open to the atmosphere. Water was boiling at the surface of the fluid column on...
AQUATIC PHOTOLYSIS OF OXY-ORGANIC COMPOUNDS ADSORBED ON GOETHITE.
Marvin C. Goldberg
1985, Conference Paper, National Meeting - American Chemical Society, Division of Environmental Chemistry
Organic materials that will not absorb light at wavelengths longer than 295 nanometers (the solar wavelength cutoff) may nevertheless, undergo electron transfer reactions initiated by light. These reactions occur when the organic materials are adsorbed as ligand complexes to the surface of iron oxy-hydroxide (goethite). The adsorbed materials can be...
Mineral, chemical and textural relationships in rhythmic-bedded, hydrocarbon-productive chalk of the Niobrara Formation, Denver Basin, Colorado ( USA).
R. M. Pollastro, C.J. Martinez
1985, Mountain Geologist (22) 55-63
The types of hydrocarbons produced from these chalks are determined by the level of thermal maturity associated with present-day burial or paleoburial conditions. Detailed analyses of deeply-buried chalk from core of the Smoky Hill Chalk Member of the Niobrara Formation in the Champlin Petroleum 2 Boxelder Farms well combined with...
NORTH AMERICAN DATUM 1983 IMPLEMENTATION IMPACTS ON THE USGS NATIONAL MAPPING PROGRAM.
William J. Jones, Paul E. Needham
1985, Conference Paper, Technical Papers of the American Congress of Surveying and Mapping
The U. S. Geological Survey has previously experienced the impacts on the National Mapping Program that are associated with implementing a readjustment of the horizontal datum. The impacts of these past readjustments were minimal compared to those of the current readjustment. The Geological Survey currently has produced and published over...
STREAMFLOW LOSSES IN THE SANTA CRUZ RIVER, ARIZONA.
B. N. Aldridge
1985, Conference Paper
The discharge and volume of flow in a peak decrease as the peak moves through an 89-mile (143 km) reach of the Santa Cruz River. An average of three peaks per year flow the length of the reach. Of 17,500 acre-ft (21,600 dam**3) that entered the upstream end of the...
Natural hazards activities of the National Geophysical Data Center
P. A. Lockridge
1985, Earthquake Information Bulletin (USGS) (17) 60-69
The National Geophysical Data Center (NGDC), a part of the National Oceanic and Atmospheric Administration, has been given the task of collecting, managing, and disseminating the great mass of inofmation produced by scientific observations of the geophysical environment. This article describes NGDC data bases that speifically relate to natural hazards. ...
Reports from the U.S. Geological Survey’s Cascades Volcano Observatory at Vancouver, Washington
S. Brantley, J. Power, L. Topinka
1985, Earthquake Information Bulletin (USGS) (17) 20-32
Reducing losses from earthquakes through personal preparedness
W. J. Kockelman
1985, Earthquake Information Bulletin (USGS) (17) 50-59
Actions to reduce earthquake hazards can be divided into five phases:two occur before the event, one during the event, and two after the event. The phases are: (1) Mitigation techniques taken anywhere from 1 to 20 years before the event, (2) preparedness measures taken 1 to 20 weeks before the...
