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Page 6201, results 155001 - 155025

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Map showing areas serviced by public water-supply agencies in 1973 greater Pittsburgh region, southwestern Pennsylvania
Robert M. Beall
1974, Miscellaneous Field Studies Map 607
Urban water planning, development, and management are many sectored, costly efforts, subject to a multitude of controls and demands including those imposed by nature. One primary concern in development is for providing a dependable and safe water supply. In spite of a bountiful natural availability, the process of satisfying consumer...
Antiferromagnetic inclusions in lunar glass
A. N. Thorpe, F. E. Senftle, Charles Briggs, Corrine Alexander
1974, Earth and Planetary Science Letters (22) 85-90
The magnetic susceptibility of 11 glass spherules from the Apollo 15, 16, and 17 fines and two specimens of a relatively large glass spherical shell were studied as a function of temperature from room temperature to liquid helium temperatures. All but one...
Seismic risk maps
David M. Perkins
Robert Mallis, editor(s)
1974, Earthquake Information Bulletin (USGS) (6) 10-15
What is the possibility that an earthquake will occur near you? Have you ever wondered what the chances were that an earthquake could affect you at home or at work? Perhaps you are planning to move to a part of the country subject to frequent earthquakes. How do you determine...
Myxosoma cerebralis: Comparative sensitivity of spore detection methods
M.E. Markiw, K. Wolf
1974, Journal of the Fisheries Research Board of Canada (31) 1597-1600
Physical and biophysical methods of detecting spores of Myxosoma cerebralis were used in sequence on 87 individual fingerling rainbow trout (Salmo gairdneri) from two populations with a low incidence of infection. Physical methods of releasing spores from the organs of equilibrium, gill arches, or the axial skeleton gave an estimated rate of...
Water quality effects of seepage from earthen dams
C. Yost Jr., J.W. Naney
1974, Journal of Hydrology (21) 15-26
Analyses of surface and seepage waters from selected floodwater retarding structures in west-central Oklahoma, U.S.A. show the salinity of seepage to be several times greater than that of the impounded waters. The increases in concentration of the several chemical components are not proportional....
Episodic Cenozoic volcanism and tectonism in the Andes of Peru
D. C. Noble, E.H. McKee, E. Farrar, U. Petersen
1974, Earth and Planetary Science Letters (21) 213-220
Radiometric and geologic information indicate a complex history of Cenozoic volcanism and tectonism in the central Andes. K-Ar ages on silicic pyroclastic rocks demonstrate major volcanic activity in central and southern Peru, northern Chile, and adjacent areas during the Early and Middle...
Osmium, ruthenium, iridium and uranium in silicates and chromite from the eastern Bushveld Complex, South Africa
R.h. Gijbels, Hugh T. Millard Jr., G. A. Desborough, A.J. Bartel
1974, Geochimica et Cosmochimica Acta (38) 319-337
Osmium, ruthenium, iridium and uranium contents were determined in eight ortho pyroxene, seven plagioclase, and three chromite mineral separates from the eastern Bushveld Complex. Neutron activation analysis was used to measure the platinum metals, and uranium was determined by a fission track technique....
Migration and redistribution of zinc and cadmium in marine estuarine system
Charles W. Holmes, Elizabeth A. Slade, C.J. McLerran
1974, Environmental Science & Technology (8) 255-259
A survey of trace-element levels in the estuarine sediments of Texas shows that Corpus Christi Bay has anomalously high concentrations of zinc and cadmium. Maps of elemental abundance within the bay indicate large concentration gradients, the highest values being near the harbor entrance. Seasonal determinations of metal levels in the...
Comparative studies on extraction of sediment interstitial waters: Discussion and comment on the current state of interstitial water studies
F.T. Manheim
1974, Clays and Clay Minerals (22) 337-343
The implication by Murthy and Ferrell (1972)that interstitial water studies are in a confused state is criticized on the basis that the authors have not drawn on a considerable body of data, especially Soviet studies since the 1950's, and results of the Deep Sea Drilling Project. Pressure filtration systems for...
Preliminary petrographic description and geologic implications of the Apollo 17 Station 7 boulder consortium samples
E. C. T. Chao, J.A. Minkin, C.L. Thompson
1974, Earth and Planetary Science Letters (23) 413-428
Preliminary petrographic description and mineral composition of four hand samples (77135, 77115, 77075 and 77215) are presented. 77135, 77115, and 77075 all crystallized from fragment-laden melts; they are similar in textures but differ in grain size. 77135 and 77115 are pigeonite feldspathic...
Martian planetwide crater distributions: Implications for geologic history and surface processes
L.A. Soderblom, C.D. Condit, R.A. West, B.M. Herman, T. J. Kreidler
1974, Icarus (22) 239-263
Population-density maps of craters in three size ranges (0.6 to 1.2 km, 4 to 10 km, and >20 km in diameter) were compiled for most of Mars from Mariner 9 imagery. These data provide: historical records of the eolian processes (0.6 to 1.2 km craters); stratigraphic, relative, and absolute timescales...
Geophysical evidence for the intersection of the St Paul, Cape Palmas and Grand Cess fracture zones with the continental margin of Liberia, West Africa
John C. Behrendt, J. Schlee, James M. Robb
1974, Nature (248) 324-326
PUBLISHED reconstructions of Gondwana continent1 (Fig. la) show a gap in fit near the junction of the Americas and Africa. To study this critical area, the Unitedgeo I made geophysical measurements and collected rock samples across the continental margin of Liberia (USGS-IDOE cruise leg 5) in November...
Reference samples for the earth sciences
F.J. Flanagan
1974, Geochimica et Cosmochimica Acta (38) 1731-1744
A revised list of reference samples of interest to geoscientists has been extended to include samples for the agronomist, the archaeologist and the environmentalist. In addition to the source from which standard samples may be obtained, references or pertinent notes for some samples are included.The number of rock reference samples...
Problems encountered in the use of neutron methods for elemental analysis on planetary surfaces
F. Senftle, P. Philbin, R. Moxham, G. Boynton, J. Trombka
1974, Nuclear Instruments and Methods (117) 435-443
From experimental studies of gamma rays from fast and thermal neutron reactions in hydrogeneous and non-hydrogeneous, semi-infinite samples and from Monte Carlo calculations on soil of a composition which might typically be encountered on planetary surfaces, it is found that gamma rays from...