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Page 5441, results 136001 - 136025

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Not all publications have extents, not all extents are completely accurate
Carbon, hydrogen, and oxygen isotope studies of the regional metamorphic complex at Naxos, Greece
R. O. Rye, R.D. Schuiling, D.M. Rye, J.B.H. Jansen
1976, Geochimica et Cosmochimica Acta (40) 1031-1049
At Naxos, Greece, a migmatite dome is surrounded by schists and marbles of decreasing metamorphic grade. Sillimanite, kyanite, biotite, chlorite, and glaucophane zones are recognized at successively greater distances from the migmatite dome. Quartz-muscovite and quartz-biotite oxygen isotope and mineralogie temperatures range from 350 to 700°C.The metamorphic complex can be...
Capturing and marking howler monkeys for field behavioral studies
N.J. Scott Jr., A.F. Scott, L.A. Malmgren
1976, Primates (17) 527-533
Methods for capturing and marking howler monkeys for ecological studies are discussed. Systems for capturing and handling animals are compared. A dart with liquid Sernylan for capture and Sernylan or Ketamine as a holding drug was preferred to darts using powdered succinylcholine chloride (SCC) and ether. The effectiveness of both...
Atomic absorption spectrometric determination of copper, zinc, and lead in geological materials
R. F. Sanzolone, T. T. Chao
1976, Analytica Chimica Acta (86) 163-168
An atomic absorption spectrometric method is described for the determination of copper, zinc, and lead in geological materials. The sample is digested with HF—HCl—H2O2; the final solution for analysis is in 10 % (v/v) HCl. Copper and zinc are determined directly by aspirating the solution into an air—acetylene flame. A...
Determination of lead in rocks by radiometric isotope dilution and substoichiometric extraction
Philip Aruscavage
1976, Analytica Chimica Acta (82) 343-348
A rapid procedure is described for the determination of lead in rocks by an isotope-dilution substoichiometric method. After the sample has been digested with acid in the presence of 210Pb tracer, the lead is separated by dithizone extractions. After the lead has been back-extracted into aqueous solution, it is reacted with...
The national coal-resources data system of the U.S. geological survey
M.D. Carter
1976, Computers & Geosciences (2) 331-340
The National Coal Resources Data System (NCRDS) was designed by the U.S. Geological Survey (USGS) to meet the increasing demands for rapid retrieval of information on coal location, quantity, quality, and accessibility. An interactive conversational query system devised by the USGS retrieves information from the data bank through a standard...
Progress in remote sensing (1972-1976)
W. A. Fischer, W. R. Hemphill, Allan Kover
1976, Photogrammetria (32) 33-72
This report concerns the progress in remote sensing during the period 1972–1976. Remote sensing has been variously defined but is basically the art or science of telling something about an object without touching it. During the past four years, the major research thrusts have been in three areas: (1) computer-assisted enhancement and...
Disharmony of the spheres: Recent trends in planetary surface nomenclature
R.J. Pike
1976, Icarus (27) 577-583
Inadvisable departures from tradition in naming newly mapped features on Mars, Mercury, and the Moon have been implemented and proposed since 1970. Functional need for place names also has become confused with cartographic convenience. Much of the resulting new nomenclature is neither unique, efficient, nor imaginative. The longstanding classical orientation...
The area of influence of an exploratory hole
D.A. Singer, L. J. Drew
1976, Economic Geology (71) 642-647
A method is presented for calculating the area of influence of exploratory drill holes by using the size and shape of resource targets. The solution presented is for elliptical and circular targets, but the method is applicable to any shaped target. The degree to which points have been explored depends...
A study of alternative schemes for extrapolation of secular variation at observatories
L.R. Alldredge
1976, Physics of the Earth and Planetary Interiors (11)
The geomagnetic secular variation is not well known. This limits the useful life of geomagnetic models. The secular variation is usually assumed to be linear with time. It is found that attenative schemes that employ quasiperiodic variations from internal and external sources can improve the extrapolation of secular variation at...
Mineralogy of ash of some American coals: Variations with temperature and source
R.S. Mitchell, H.J. Gluskoter
1976, Fuel (55) 90-96
Ten samples of mineral-matter residue were obtained by the radio-frequency low-temperature ashing of subbituminous and bituminous coals. The low-temperature ash samples were then heated progressively from 400 °C to 1400 °C at 100 °C intervals. Mineral phases present at each temperature interval were determined by X-ray diffraction analyses. The minerals...
Upland sandpiper nesting and management in North Dakota
L.M. Kirsch, K.F. Higgins
1976, Wildlife Society Bulletin (4) 16-20
Nests of 195 upland sandpipers (Bartramia longicauda) on the Missouri Coteau of North Dakota generally were well concealed by grassy vegetation which ranged from 15.4-30.8 cm in height. Nest densities ranged from 0.3 per 40.5 ha on annually tilled croplands to 6.8 per 40.5 ha on native grasslands during the...
Submarine geothermal resources
D.L. Williams
1976, Journal of Volcanology and Geothermal Research (1) 85-100
Approximately 20% of the earth's heat loss (or 2 ?? 1012 cal/s) is released through 1% of the earth's surface area and takes the form of hydrothermal discharge from young (Pleistocene or younger) rocks adjacent to active seafloor-spreading centers and submarine volcanic areas. This amount is roughly equivalent to man's...
Annual report to the Pecos River Commission on investigations being made in New Mexico and Texas by the United States Geological Survey in cooperation with the Pecos River Commission: calendar year 1976
Water Resources Division, U.S. Geological Survey
1976, Report
This report describes investigations in New Mexico and Texas made by the Water Resources Division of the U.S. Geological Survey in cooperation with the Pecos River Commission during the 1976 calendar year and provides a summary of costs for the fiscal year ending June 30, 1976....
Radiocarbon dates indicate rates of graben downfaulting, San Jacinto Valley, California
B. E. Lofgren, Meyer Rubin
1975, Journal of Research of the U.S. Geological Survey (3) 45-46
Recent radiocarbon dates for wood samples collected from three depths in San Jacinto Valley graben indicate active tectonic downfaulting during the past 42,000 yr. The flood plain of graded San Jacinto River, entering the valley from the southeast and leaving toward the west, serves as a reference datum across the...
Developing a state water plan: Ground-water conditions in Utah, spring of 1975
James H. Eychaner, W.N. Jibson, E.L. Bolke, R. W. Mower, L. R. Herbert, R.M. Cordova, V.L. Jensen, M. D. ReMillard, G. W. Sandberg, C.T. Sumison, L.J. Bjorklund
1975, Report
This report is the twelfth in a series of annual reports that describe ground-water conditions in Utah. Reports in this series, prepared cooperatively by the U.S. Geological Survey and the Utah Division of Water Resources, provide data to enable interested parties such as legislators, administrators, and planners to keep abreast...