Investigation of internal friction in fused quartz, steel, Plexiglass, and Westerly granite from 0.01 to 1.00 Hertz at 10-8 to 10-7 strain amplitude
Hsi-Ping Liu, L. Peselnick
1983, Journal of Geophysical Research Solid Earth (88) 2367-2379
A detailed evaluation on the method of internal friction measurement by the stress-strain hysteresis loop method from 0.01 to 1 Hz at 10−8 to 10−7 strain amplitude and 23.9°C is presented. Significant systematic errors in relative phase measurement can result from convex end surfaces of the sample and stress sensor and from...
Large partition coefficients for trace elements in high-silica rhyolites
G. Mahood, W. Hildreth
1983, Geochimica et Cosmochimica Acta (47) 11-30
The partitioning of 25 trace elements between high-silica rhyolitic glass and unzoned phenocrysts of potassic and sodic sanidine, biotite, augite, ferrohedenbergite, hypersthene, fayalite, titanomagnetite, ilmenite, zircon, and allanite has been determined by INAA on suites of samples from the mildly peralkaline...
Characteristic analysis-1981: Final program and a possible discovery
R.B. McCammon, J.M. Botbol, R. Sinding-Larsen, R. W. Bowen
1983, Journal of the International Association for Mathematical Geology (15) 59-83
The latest ornewest version of thecharacteristicanalysis (NCHARAN)computer program offers the exploration geologist a wide variety of options for integrating regionalized multivariate data. The options include the selection of regional cells for characterizing deposit models, the selection of variables that constitute the models, and the choice of logical combinations of variables...
DETERMINATION OF MODE OF OCCURRENCE OF TRACE ELEMENTS IN THE UPPER FREEPORT COAL BED USING SIZE AND DENSITY SEPARATION PROCEDURES.
C.A. Palmer, R.H. Filby
1983, Conference Paper
A procedure has been developed using low temperature ashing, followed by size and sink-float separation of the ash, X-ray diffraction analysis, and instrumental neutron activation analysis to give both qualitative and quantitative information for major, minor and trace minerals and their associated trace elements in coal....
A teleseismic analysis of the New Brunswick earthquake of January 9, 1982
G. L. Choy, J. Boatwright, J. W. Dewey, S.A. Sipkin
1983, Journal of Geophysical Research Solid Earth (88) 2199-2212
The analysis of the New Brunswick earthquake of January 9, 1982, has important implications for the evaluation of seismic hazards in eastern North America. Although moderate in size (mb 5.7), it was well-recorded teleseismically. Source characteristics of this earthquake have been determined from analysis of data that were digitally recorded by...
Bedform distribution and inferred sand transport on Georges Bank, United States Atlantic continental shelf.
D.C. Twichell
1983, Sedimentology (30) 695-710
Four bedform provinces have been identified using sidescan-sonar and echo-sounding techniques: large sand waves superimposed on sand ridges, small sand waves, megaripples, and featureless seafloor. Sand-wave asymmetry and surface-sediment texture have been used to infer bedload transport paths and although the asymmetry of megaripples could not be determined, the occurrence...
The saltwater-freshwater interface in the Tertiary limestone aquifer, southeast Atlantic outer-continental shelf of the U.S.A.
R.H. Johnston
1983, Journal of Hydrology (61) 239-249
Hydrologic testing in an offshore oil well abandoned by Tenneco, Inc., determined the position of the saltwater-freshwater interface in Tertiary limestones underlying the Florida-Georgia continental shelf of the U.S.A. Previous drilling (JOIDES and U.S.G.S. AMCOR projects) established the existence of freshwater far offshore in this area. At the Tenneco well...
Sm-Nd age and isotopic systematics of the bimodal suite, ancient gneiss complex, Swaziland
R. W. Carlson, D.R. Hunter, F. Barker
1983, Nature (305) 701-704
Studies of the development and stabilization of the Archaean crust often focus on the relative temporal relationships between the metamorphosed basaltic to ultramafic volcanic units (greenstone belts) and the sialic gneiss terrains that make up the oldest sections of the terrestrial crust. At the heart of this interest are the...
NEW HORIZONS FOR THE NATIONAL HIGH-ALTITUDE PHOTOGRAPHY PROGRAM.
Peter F. Bermel
1983, Conference Paper
The National High-Altitude Photography Program (NHAP) is a multi-Federal agency activity to acquire uniform imagery for the establishment of a national high-altitude photographic data base. Since the inception of NHAP in 1980, black-and-white and color infrared stereoscopic imagery has been acquired for about 50% of the 3,000,000 square miles in...
SUBMICROSCOPIC ( less than 1 mu m) MINERAL CONTENTS OF VITRINITES IN SELECTED BITUMINOUS COAL BEDS.
J.A. Minkin, E. C. T. Chao, C.L. Thompson, M.-V. Wandless, F.T. Dulong, R.R. Larson, S.G. Neuzil
Gooley Ron, editor(s)
1983, Conference Paper, Proceedings, Annual Conference - Microbeam Analysis Society
An important aspect of the petrographic description of coal is the characterization of coal quality, including chemical attributes. For geologic investigations, data on the concentrations, distribution, and modes of occurrence of minor and trace elements provide a basis for reconstructing the probable geochemical environment of the swamp material that was...
Mammoth Lakes earthquakes and ground uplift: precursors to possible volcanic activity ( USA)?
R. A. Bailey
1983, Earthquake Information Bulletin (USGS) (15) 88-101
Recent seismicity and ground uplift in the area are described. A comparison with other areas in the Cascades is made and the possibility of the Long Valley Magma Chamber as a source for eruptions is discussed. -P.N.Chroston...
Geo-botanical evidence of Late Quaternary mass wasting in block field areas of Virginia
Cliff R. Hupp
1983, Earth Surface Processes and Landforms (8) 439-450
Studies of block fields at Massanutten Mountain, Virginia, document and provide information on the magnitude and frequency of mass movement on these coarse-grained slopes. Although Pleistocene periglacial climate may have facilitated original formation of block fields, some block fields now continue to spread downslope during intense runoff events. Present block-field...
Geotherm: the U.S. geological survey geothermal information system
J. D. Bliss, A. Rapport
1983, Computers & Geosciences (9) 35-39
GEOTHERM is a comprehensive system of public databases and software used to store, locate, and evaluate information on the geology, geochemistry, and hydrology of geothermal systems. Three main databases address the general characteristics of geothermal wells and fields, and the chemical properties of geothermal fluids; the last database is currently...
Groundwater contamination by organic bases derived from coal-tar wastes
W. E. Pereira, C.E. Rostad, J.R. Garbarino, M. F. Hult
1983, Environmental Toxicology and Chemistry (2) 283-294
A fluid sample from a shallow aquifer contaminated by coal-tar wastes was analyzed for organic bases. The sample consisted of a mixture of aqueous and oily-tar phases. The phases were separated by centrifugation and filtration. Organic bases were isolated from each phase by pH adjustment and solvent extraction. Organic bases...
The relationship of acquisition systems to automated stereo correlation.
A. P. Colvocoresses
1983, Photogrammetric Engineering and Remote Sensing (49) 539-544
Today a concerted effort is being made to expedite the mapping process through automated correlation of stereo data. Stereo correlation involves the comparison of radiance (brightness) signals or patterns recorded by sensors. Conventionally, two-dimensional area correlation is utilized but this is a rather slow and cumbersome procedure. Digital correlation can...
Crustal and upper mantle structure of the northern and central Sierra Nevada
B.B. Mavko, G. A. Thompson
1983, Journal of Geophysical Research Solid Earth (88) 5874-5892
Teleseismic data were recorded within the Sierra Nevada to look for lateral variations in the upper mantle. The data were collected at both temporary and permanent stations, and P wave residuals were computed. After correcting the P residual data for crustal and topographic effects, there is still a variation of as much as 0.5-0.6...
Crustal structure of the northern mississippi embayment and a comparison with other continental rift zones
Walter D. Mooney, M.C. Andrews, A. Ginzburg, D.A. Peters, R. M. Hamilton
1983, Tectonophysics (94) 327-348
Previous geological and geophysical investigations have suggested that the Mississippi Embayment is the site of a Late Precambrian continental rift that was reactivated in the Mesozoic. New information on the deep structure of the northern Mississippi Embayment, gained through an extensive seismic refraction survey, supports a rifting hypothesis. The data...
Research note: Isolation of a herpesvirus from a bald eagle nestling
D. E. Docherty, R.I. Romaine, R.L. Knight
1983, Avian Diseases (27) 1162-1165
Cloacal swabs collected from wild bald eagle nestlings (Haliaeetus leucocephalus) were tested for viruses. A virus isolated from one of these samples had a lipid coat and contained DNA. Electron microscopy confirmed that it was a herpesvirus. This appears to be the first report of a herpesvirus isolation from a...
An updated Bouguer anomaly map of south-central West Africa
David A. Hastings
1983, Geophysics (48) 1120-1128
A new Bouguer gravity anomaly map compiled for western Africa adds data for Ghana, Guinea, and Liberia.The new data add detail to a key part of the Eburnean shield and assist in the development of a model of rifting at the time of the Eburnean orogeny, 2000 million years ago....
Preliminary evaluation of Ivermectin for control of Psoroptes ovis in Desert Bighorn Sheep
H.G. Kinzer, W.P. Meleney, Robert E. Lange Jr., W.E. Houghton
1983, Journal of Wildlife Diseases (19) 52-54
No abstract available....
Temporal patterns of seed use and availability in a guild of desert ants
Patricia Mehlhop, Norman J. Scott Jr.
1983, Ecological Entomology (8) 69-85
1Temporal patterns of seed use were studied from late winter to autumn in three species of seed-harvesting ants in the Sonoran Desert. Measures of effective foraging activity, dietary niche breadth and dietary niche overlaps were obtained each month and were tested for correlation with estimates of the...
Using single board computers for control applications
J. T. Fuss
1983, Fisheries (8) 8-13
No abstract available....
Environmental factors that influence prescribed burning in the Northern Plains
A.D. Kruse, K.F. Higgins, J.L. Piehl
1983, Book chapter, Management of public lands in the Northern Great Plains
Several environmental conditions were recorded and analyzed for 192 prescribed burns in the Northern Great Plains. The purpose of these burns was to improve wildlife habitat and manipulate native prairie vegetation. All of the fires occurred in grassland and shrubsteppe vegetation types. Fuels were predominantly grasses and forbs intermixed with...
New evidence for the age of the Gubik Formation Alaskan North Slope
C.A. Repenning
1983, Quaternary Research (19) 356-372
At several Alaskan North Slope localities south of the shore of the Arctic Ocean the Gubik Formation, herein regarded as latest Pliocene and Pleistocene in age, contains a marine unit at its base. Near Ocean Point and near Teshekpuk Lake this basal unit, or the lowest exposed marine unit, of...
Capture myopathy in a free-flying greater sandhill crane (Grus canadensis tabida) from Wisconsin
R. M. Windingstad, S.S. Hurley, L. Sileo
1983, Journal of Wildlife Diseases (19) 289-290
No abstract available....
