G.C. Sanderson, editor(s)
1977, Book
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Page 5271, results 131751 - 131775
Publication Extents
Not all publications have extents, not all extents are completely accurateFred K. Miller, Douglas M. Morton
1977, Journal of Research of the U.S. Geological Survey (5) 643-649
Dating of some small plutons in the San Gabriel and Chocolate Mountains, southern California, yields Miocene K-Ar ages. A single granodiorite pluton that has been segmented by branches of the San Jacinto fault intrudes the Pelona Schist and yields ages of 14.0 to 18.6 million years. Several quartz monzonite plutons...
Norman J. Page, Henry C. Berg, Joseph Haffty
1977, Journal of Research of the U.S. Geological Survey (5) 629-636
The Gravina-Nutzotin belt of Middle (?) Jurassic to middle Cretaceous sedimentary and volcanic rocks in south and southeastern Alaska includes concentrically zoned ultramafic complexes known to contain platinum-group metals. Previous isotopic, petrologic, and geologic studies suggested a close relation in time and space between the volcanic rocks and the ultramafic...
Marvin C. Goldberg, Eugene R. Weiner
1977, Journal of Research of the U.S. Geological Survey (5) 561-563
An indepth evaluation of the available technology in the field of laser-Raman spectroscopy indicates that a TV-type detector, a single monochromator with a holographic grating, an entrance slit filter blocking the Rayleigh light, and a pulsed laser coupled to signal averaging electronics is the best combination of commercial equipment that...
Stanley A. Leake
1977, Journal of Research of the U.S. Geological Survey (5) 535-540
Construction of the Tennessee-Tombigbee Waterway in northeast Mississippi will involve dewatering as much as 46 m of an unconfined aquifer near the Tennessee Valley divide. Dewatering by trenching is one of the proposed methods. Methods of calculating effects of dewatering by trenching have been heretofore limited to situations where ideal...
J. Tillman
1977, Journal of Research of the U.S. Geological Survey (5) 583-587
A modified LEGO WR-12 carbon determinator is used in a combustimetric determination of total carbon in geologic materials. A thermal conductivity cell is used as the sensing device. International reference samples are analyzed and compared to results previously published. Three new standards from the Canadian Certified Reference Materials Project were...
Carol A. Gent
1977, Journal of Research of the U.S. Geological Survey (5) 595-596
Ordinary quartz sand grains can be coated with pyrite for use in laboratory experiments on the genetic geochemistry of roll-type uranium deposits. The sand is first added to a ferric chloride solution. The slow addition of sodium hydroxide to the mixture gives the sand grains an iron oxide coating. This...
Mortimer H. Staatz, Nancy M. Conklin, Isabelle K. Brownfield
1977, Journal of Research of the U.S. Geological Survey (5) 623-628
Sphene is an abundant accessory mineral in some abnormally radioactive plutonic rocks in west-central Alaska. Seven samples of sphene from four different areas in west-central Alaska contained from 20350 to 39180 parts per million total rare earths and 390 to 2000 ppm thorium. The lanthanide content in six of the...
F. G. Lesure, J. M. Motooka, P. L. Weis
1977, Journal of Research of the U.S. Geological Survey (5) 609-621
Semi-quantitative spectrographic analyses of mineralized and unmineralized sandstone, siltstone, and claystone from the Catskill Formation of Devonian age in Bradford, Columbia, and Lycoming Counties, Pa., suggest that copper, silver, and uranium are the principal metallic elements concentrated in the mineralized rock. Lead, mercury, and molybdenum may be concentrated slightly in...
R. M. Siebert, K.A. McGee, P. B. Hostetler
1977, Journal of Research of the U.S. Geological Survey (5) 597-602
A temperature-controlled water bath for the study of ion-pairing equilibria and mineral solubility in aqueous solutions below 100°C is described. The bath is similar to a previously described system (P. B. Hostetler and C. L. Christ, 1968, U.S. Geol. Survey Prof. Paper 600-D, p. D217-D221) but incorporates several significant improvements....
D.M. Hopkins
1977, Journal of Research of the U.S. Geological Survey (5) 589-593
An improved method based on an ion-selective electrode technique for the analysis of fluorine in rocks and soils is presented. Analyses are made by using a sodium carbonate-potassium carbonate fusion and a citric acid dissolution of the fuseate. Prior to determining the fluorine concentration by a standard-addition procedure, sodium citrate...
F.O. Simon, E.Y. Campbell, P. J. Aruscavage
1977, Journal of Research of the U.S. Geological Survey (5) 579-581
Thallium was determined in 16 USGS standard rocks by atomic absorption spectroscopy in which a heated graphite atomizer was used after extraction as thallium iodide into amyl acetate. Four subsamples from four bottles of each standard sample, except G-1 and W-1, were analyzed in random order, and the average thallium...
R.L. Wershaw, D.J. Pinckney
1977, Journal of Research of the U.S. Geological Survey (5) 571-577
Humic acid fractions form molecular aggregates in solution. In previous studies we have shown by small angle X-ray scattering that the size of these aggregates is a function of pH. In this study we have found that the size of the aggregates of two humic acid fractions in water and...
R.L. Wershaw, D.J. Pinckney, S.E. Booker
1977, Journal of Research of the U.S. Geological Survey (5) 565-569
A new model is proposed for the structure of humic acids. In this model humic acid is pictured as being made up of a hierarchy of structural elements. At the lowest level in this hierarchy are simple phenolic, quinoid, and benzene carboxylic acid groups. These groups are bonded covalently into...
Linda J. Britton
1977, Journal of Research of the U.S. Geological Survey (5) 547-559
Periphyton and phytoplankton samples were collected monthly at five sites in the Sacramento River between May 1972 and April 1973. Periphyton were analyzed for species identification and biomass, and phytoplankton were analyzed for species identification and concentrations. The results were used to assess biological water-quality conditions in the river and...
H. R. Hejl Jr.
1977, Journal of Research of the U.S. Geological Survey (5) 541-545
A method is presented for adjusting values of Manning's roughness coefficient for flooded urban areas on the basis of the density of buildings on a flood plain and verified roughness coefficients for natural conditions. An urban roughness coefficient can be calculated to emulate the water-surface profiles to within 0.06 meter...
Robert W. Potter II
1977, Journal of Research of the U.S. Geological Survey (5) 603-607
A series of pressure correction diagrams for 1-, 5-, 10-, 15-, 20-, and 25-percent NaCl solutions has been generated from the volumetric data for NaCl by R. W. Potter II and D. L. Brown in 1975. The diagrams cover the temperature range from 20° to 400° C at pressures up...
R.B. Park, W. W. Hays
1977, Journal of Research of the U.S. Geological Survey (5) 651-661
A hybrid computer is an important tool in the seismological research conducted by the U.S. Geological Survey in support of the Energy Research and Development Administration nuclear explosion testing program at the Nevada Test Site and the U.S. Geological Survey Earthquake Hazard Reduction Program. The hybrid computer system, which employs...
K. J. Murata
1977, Journal of Research of the U.S. Geological Survey (5) 637-642
Bloedite, epsomite, and related minerals occur in small amounts throughout the arid eastern foothills of the Diablo and Temblor Ranges, as efflorescences on siliceous shale and as deposits around small springs and a brine pond. These minerals ultimately are products of weathering of underlying organic shale, and they are reminders...
Water Resources Division, U.S. Geological Survey
1977, Report
The Geological Survey in cooperation with the National Science Foundation prepares and publishes topographic maps of selected areas of Antarctica needed to support the U.S. Antarctic Research Program (USARP) efforts. These maps are prepared from aerial photography flown by U.S. Navy Air Development Squadron Six (VXE-6) in accordance with USGS...
R.W. Casteel, D.P. Adam, J.D. Sims
1977, Quaternary Research (7) 133-143
The remains of scales of Hysterocarpus traski Gibbons (Tule perch) were found throughout a 27.44-m core from Clear Lake. Most scales occurred between the mud surface and deposits approximately 11,000 years old. Changes in growth rates of the animals were examined by measuring scale annuli and applying an empirically established regression of...
J.E. King, W.H. Allen Jr.
1977, Quaternary Research (8) 307-323
Pollen preserved in a peat deposit from a large swamp, the Old Field in the Mississippi River Valley near Advance, Missouri, records radiocarbon-dated vegetation changes between 9000 and about 3000 years ago. The principal feature of both the percentage and influx pollen diagrams is the replacement of arboreal pollen, primarily Quercus,...
T. L. Pewe, A. Journaux, R. Stuckenrath
1977, Quaternary Research (8) 51-63
A fine exposure of perennially frozen ice-rich silt and associated flora and vertebrate fauna of late-Quaternary age exists at Mamontova Gora along the Aldan River in central Yakutia, Siberia, U.S.S.R. The silt deposit caps a 50-m-high terrace and consists of three units. An upper layer 1–2 m thick overlies a...
R.M. Thorson, T. D. Hamilton
1977, Quaternary Research (7) 149-176
The Dry Creek archeologic site contains a stratified record of late Pleistocene human occupation in central Alaska. Four archeologic components occur within a sequence of multiple loess and sand layers which together form a 2-m cap above weathered glacial outwash. The two oldest components appear to be of late Pleistocene...
P. D. Rabinowitz, A. Cooper
1977, Marine Geology (24) 309-320
Eleven seismic reflection profiles across Shirshov Ridge and the adjacent deep-water sedimentary basins (Komandorsky and Aleutian Basins) are presented to illustrate the sediment distribution in the western Bering Sea. A prominent seismic reflecting horizon, Reflector P (Middle—Late Miocene in age), is observed throughout both the Aleutian and Komandorsky Basins at...