Spectacular mobility of ash flows around Aniakchak and Fisher calderas, Alaska
T. P. Miller, R.L. Smith
1977, Geology (5) 173-176
Ash flows around Aniakchak and Fisher calderas in the Aleutian volcanic arc show evidence of having flowed over formidable topographic barriers at distances of tens of kilometres from their source. Ash flows swept down glaciated valleys on the south side of Aniakchak caldera, crossed a broad lowland with an altitude...
Structure mapping on enhanced landsat images of Southern Brazil: Tectonic control of mineralization and speculations on metallogeny
Terry W. Offield, E.A. Abbott, A. R Gillespie, S.O. Loguercio
1977, Geophysics (42) 482-500
Computer enhancement, particularly contrast-stretching, reveals a previously unnoticed east-west structural zone across a Landsat image of the southern Brazilian Precambrian shield. In this zone occur the only known economic or near-economic deposits of gold, tin, and copper. Such deposits are typically localized by small east-west structural elements. Non-economic copper occurrences...
Eocene and Oligocene planktonic Foraminifera from the upper Butano Sandstone and type San Lorenzo Formation, Santa Cruz Mountains, California
R.Z. Poore, E. E. Brabb
1977, Journal of Foraminiferal Research (7) 249-272
No abstract available....
Significance of Mesozoic radiolarians from the pre-Nevadan rocks of the southern Klamath Mountains, California
W. P. Irwin, D. L. Jones, E.A. Pessagno Jr.
1977, Geology (5) 557-562
Ribbon cherts and siliceous tuffs of the North Fork and Rattlesnake Creek terranes of the Klamath Mountains yield Mesozoic radiolarians. Rocks of the North Fork terrane were previously considered to be of Paleozoic age and those of the Rattlesnake Creek to be of Paleozoic and Triassic age, on the basis...
Review of Paleozoic rocks of the Klamath Mountains
W. P. Irwin
1977, Conference Paper, Paleozoic paleogeography of the western United States
No abstract available....
Technique for concentrating nannoplankton from the Tertiary rocks of the California Coast and Peninsular Ranges
S.W. Moore, E. E. Brabb, A. Warren
1977, Journal of Research of the U.S. Geological Survey (5) 207-208
No abstract available....
Deposition of the Tapeats Sandstone (Cambrian) in central Arizona
Richard Hereford
1977, GSA Bulletin (88) 199-211
Grain size, bedding thickness, dispersion of cross-stratification azimuths, and assemblages of sedimentary structures and trace fossils vary across central Arizona; they form the basis for recognizing six facies (A through F) in the Tapeats Sandstone. Five of these (A through E), present in western central Arizona, are marine deposits containing...
Submarine seepage of natural gas in Norton Sound, Alaska
J.D. Cline, M.L. Holmes
1977, Science (198) 1149-1153
Unusual concentrations of dissolved two- to four-carbon alkanes were observed in the waters in Norton Sound in a localized area approximately 40 kilometers south of Nome, Alaska, in 1976. The hydrocarbons were identified in the near-bottom waters downcurrent for more than 100 kilometers from a sea-floor point source. Preliminary dynamic...
Immunization of sockeye salmon (Oncorhynchus nerka) against vibriosis using the hyperosmotic infiltration technique
Thomas R. Croy, Donald F. Amend
1977, Aquaculture (12) 317-325
Various procedures of hyperosmotic infiltration (HI) and intraperitoneal injection were used to vaccinate sockeye salmon (Oncorhynchus nerka) with killed Vibrio anguillarum. Excellent protection was evident against experimentally induced vibriosis in the groups immunized by HI with 10 × Hanks' balanced salt solution (HBSS), 1 × HBSS with 8.0% NaCl and 5.3%...
Productivity, mortality, and population trends of wolves in northeastern Minnesota
L.D. Mech
1977, Journal of Mammalogy (58) 559-574
Population parameters, mortality causes, and mechanisms of a population decline were studied in wolves (Canis lupus lycaon) from 1968 to 1976 in the Superior National Forest. The main method was aerial radio-tracking of 129 wolves and their packmates. Due to a decline in white-tailed deer (Odocoileus virginianus), the wolf population...
Prey of sea lions in the Rogue River, Oregon
R.J. Jameson, K.W. Kenyon
1977, Journal of Mammalogy (58) 672-672
No abstract available. ...
Petrology of basalt from the East Pacific Rise near 21 degrees North latitude
James G. Moore, William R. Normark, Gordon R. Hess, Charles E. Meyer
1977, Journal of Research of the U.S. Geological Survey (5) 753-759
Four dredge hauls of fresh tholeiitic basalt lava were recovered from a 3.3-kilometer-wide zone at the axis of the East Pacific Rise. Petrologic and major-element chemical studies indicate that the basalt ranges from moderately fractionated varieties to one sample enriched in iron and titanium. The four samples show no symmetrical...
Tertiary and Quaternary deposits at The Palisades, central Alaska
Warren E. Yeend
1977, Journal of Research of the U.S. Geological Survey (5) 747-752
The Palisades of the Yukon River, located near the geographic center of Alaska, has long been an attraction to people traveling along the river. Numerous scientific field parties have viewed or visited the locality and published short accounts of their observations. The river bluffs are as much as 90 meters...
Lower Tertiary biostratigraphy of the northern Santa Lucia Range, California
Richard Z. Poore, William V. Sliter, M. H. Link
1977, Journal of Research of the U.S. Geological Survey (5) 735-745
Lower Tertiary strata in .the northern Santa Lucia Range of California are correlated by means of planktonic and benthonic foraminifers. Benthonic foraminiferal assemblages from eight stratigraphic sections range in age from Ynezian to possible basal Refugian. The Paleocene mudstone contains a Ynezian benthonic foraminiferal assemblage. The Ulatisian benthonic assemblage of...
Nevada test site craters used for astronaut training
H. J. Moore
1977, Journal of Research of the U.S. Geological Survey (5) 719-733
Craters produced by chemical and nuclear explosives at the Nevada Test Site were used to train astronauts before their lunar missions. The craters have characteristics suitable for reconnaissance-type field investigations. The Schooner test produced a crater about 300 m across and excavated more than 72 m of stratigraphic section deposited...
Middle Tertiary plutonism in the Santa Catalina and Tortolita mountains, Arizona
S.C. Creasey, Norman G. Banks, Roger P. Ashley, Ted G. Theodore
1977, Journal of Research of the U.S. Geological Survey (5) 705-717
Recent reconnaissance geologic mapping in the Santa Catalina and Tortolita Mountains of southeastern Arizona, supplemented by new and published potassium-argon and fission-track ages, suggests that a large composite batholith of middle Tertiary (about 25 million years) age crops out extensively in both mountains. More than two-thirds of the batholith and...
Potassium-argon geochronology of some metamorphic, igneous, and hydrothermal events in Puerto Rico and the Virgin Islands
Dennis P. Cox, Richard F. Marvin, John W. McGonigle, David H. McIntyre, Cleaves Lincoln Rogers
1977, Journal of Research of the U.S. Geological Survey (5) 689-703
Potassium-argon ages of hornblende, biotite, and whole rocks in Puerto Rico include the following: 126 m.y. for amphibolites in the southwest part of the island; 109 m.y. for the oldest known quartz diorite plutons; 88 to 65 m.y. for emplacement of various quartz diorite and granodiorite batholiths and stocks; 38...
Age and tectonic setting of lower Paleozoic alkalic and mafic rocks, carbonatites, and thorium veins in South-central Colorado
Jerry C. Olson, Richard F. Marvin, Raymond Laurence Parker, Harald H. Mehnert
1977, Journal of Research of the U.S. Geological Survey (5) 673-687
Alkalic igneous rocks were emplaced into heterogeneous terrane of Precambrian X and Precambrian Y rocks about 570 m.y. ago (Cambrian or upper Precambrian) in the Powderhorn area in Gunnison County and about 520 m.y. ago (Cambrian) in the McClure Mountain, Gem Park, and Democrat Creek areas in the northern Wet...
Pleistocene apparent ages by U-Pb isotope and U-series methods for uranium ore in Dakota Sandstone near Gallup, New Mexico
K. A. Ludwig, Barney J. Szabo, Harry C. Granger
1977, Journal of Research of the U.S. Geological Survey (5) 669-672
Radiometric dates of a high-grade uranium ore from the Hogback No. 4 mine in Dakota Sandstone near Gallup, N. Mex., indicate a late Pleistocene age of mineralization. The 206Pb/238U and 207Pb/235U apparent ages of about 70 000 yr and 100000 yr, respectively, are discordant, but are in broad agreement with...
Effect of initial radioactive-daughter disequilibrium on U-Pb isotope apparent ages of young minerals
Kenneth R. Ludwig
1977, Journal of Research of the U.S. Geological Survey (5) 663-667
Most calculations of U-Pb isotope apparent ages are made by use of equations that assume initial secular equilibrium of the uranium decay-chains. The possible error in calculated Pb/U isotope ratios arising from this assumption (especially for ores of sandstone uranium deposits) can be over 10 percent at 1 million years...
Quality of storm-water runoff from a residential area, Broward County, Florida
H. C. Mattraw Jr., C. B. Sherwood
1977, Journal of Research of the U.S. Geological Survey (5) 823-834
Rainfall, runoff, and water-quality information were collected in a 19.2-hectare single-family residential area in Broward County, Fla., between April 1974 and September 1975. During this period, 231 rainfall periods were recorded; 106 were large enough to produce runoff, and 30 were sampled for chemical analyses. The fraction of rainfall that...
Solution of water-table and anisotropic flow problems by using the strongly implicit procedure
S. P. Larson, Peter C. Trescott
1977, Journal of Research of the U.S. Geological Survey (5) 815-821
The use of the strongly implicit procedure (SIP) with an additional iteration parameter, β, to scale the residual vector is advantageous to the solution of some ground-waterflow problems. For steady-state water-table problems plagued by excessive elimination of grid blocks during the iteration process, selection of β<1 can be effective in...
Accuracy of channel measurements and the implications in estimating streamflow characteristics
Kenneth L. Wahl
1977, Journal of Research of the U.S. Geological Survey (5) 811-814
Regional relations between flow characteristics and stream-channel size offer a promising alternative to available methods of estimating flow characteristics for ungauged sites, particularly in semiarid regions. The reliability of such relations and of flow estimates made from them is partly dependent on the user's ability to recognize a suitable reach...
Measuring total antimony in geothermal waters by flame atomic absorption spectrometry
R. E. Stauffer
1977, Journal of Research of the U.S. Geological Survey (5) 807-809
A flame atomic absorption procedure utilizing an electrodeless discharge lamp is described for determining total solute antimony in silica-rich geothermal waters. Following NaNO2 oxidation of Sb+3, SbCl5 is extracted from 6 N HCl solution by using MIBK (methyl isobutyl ketone) ; silica in the organic layer is removed by centrifugation....
Heat capacities of gibbsite, Al(OH)3, between 13 and 480 K and magnesite, MgCO3, between 13 and 380 K and their standard entropies at 289.15 K, and the heat capacities of Calorimetry Conference benzoic acid between 12 and 316 K
Bruce S. Hemingway, Richard A. Robie, James R. Fisher, William H. Wilson
1977, Journal of Research of the U.S. Geological Survey (5) 797-806
The heat capacities of gibbsite and magnesite were measured between 13 and 380 K by means of an adiabatic calorimeter. The heat capacity of gibbsite was measured continuously between 340 and 480 K by means of a differential scanning calorimeter. Tables of the thermodynamic functions C°P, (H°T–H°O)/T,–(G°T–H°O)/T, and S°T–S°O are...
