Fission-track ages of apatite in the Wasatch Mountains, Utah: An uplift study
C. W. Naeser, B. Bryant, M. D. Crittenden Jr., M. L. Sorensen
1983, Memoir of the Geological Society of America (157) 29-36
Apatite fission-track ages from basement rocks in the Wasatch Mountains between Ogden and Bountiful, Utah, range from 5 m.y. near the Wasatch fault along the west margin of the mountains to 94 m.y. on the crest of the range and show a correlation with altitude within individual fault blocks. Analysis...
Evidence for two pulses of glaciation during the late Proterozoic in northern Utah and southeastern Idaho
M. D. Crittenden Jr., N Christie-Blick, Paul K. Link
1983, Geological Society of America Bulletin (94) 437-450
A record of glaciation during late Proterozoic time is preserved in a number of localities extending from the Sheeprock Mountains, Utah, to Pocatello, Idaho, and from the Park City area 40 km east of Salt Lake City to the Deep Creek Range along the Utah-Nevada line. Over much of this...
Correlation of metamorphosed Paleozoic strata of the southeastern Mojave Desert region, California and Arizona
Paul Stone, Keith A. Howard, Warren Hamilton
1983, GSA Bulletin (94) 1135-1147
Isolated outcrops of deformed, regionally metamorphosed Paleozoic strata are scattered within the southeastern Mojave Desert region of California and western Arizona. These strata unconformably overlie a basement of Proterozoic crystalline rocks and are overlain in turn by metamorphosed Mesozoic sedimentary rocks. The strata can be correlated lithostratigraphically with the classic...
New data on the age of Lepidocyclina in California
E. E. Brabb, Kristen McDougall, R.Z. Poore
1983, Journal of Foraminiferal Research (13) 167-178
During the 1930's and early 1940's, controversy about the age of Lepidocyclina californica and faunas associated with it led to unreconcilable differences of opinion in the attempt to provide a standard stratigraphic framework for Cenozoic rocks of western North America. Two standards with significantly different series age assignments were provided,...
Conodonts of the western Paleozoic and Triassic belt, Klamath Mountains, California and Oregon
William P. Irwin, Bruce R. Wardlaw, T.A. Kaplan
1983, Journal of Paleontology (57) 1030-1039
Conodonts were extracted from 32 samples of limestone and 5 samples of chert obtained from the Western Paleozoic and Triassic belt of the Klamath Mountains province. Triassic conodonts were found in 17 samples, and late Paleozoic conodonts in 7 samples. Conodonts of the remaining 13 samples cannot be dated more...
The ophiolitic North Fork terrane in the Salmon River region, central Klamath Mountains, California
C.J. Ando, W. P. Irwin, D. L. Jones, J.B. Saleeby
1983, GSA Bulletin (94) 236-252
The North Fork terrane is an assemblage of ophiolitic and other oceanic volcanic and sedimentary rocks that has been internally imbricated and folded. The ophiolitic rocks form a north-trending belt through the central part of the region and consist of a disrupted sequence of homogeneous gabbro, diabase, massive to pillowed...
Introduction
D. M. Miller, Keith A. Howard
D. M. Miller (compiler), V. R. Todd, K. A. Howard, editor(s)
1983, GSA Memoirs 1-2
Tectonic and Stratigraphic Studies in the Eastern Great Basin is compiled as a tribute to Max D. Crittenden, Jr., whose geologic leadership and exemplary studies in the eastern Great Basin region have stimulated significant scientific advances. Many of the authors in this volume conducted their studies with assistance from Max,...
Airborne geophysical survey of the Ar Riyad quadrangle, sheet 24 I
U.S. Geological Survey Saudi Arabia Mission, Saudi Arabia. Deputy Ministry for Mineral Resources
1983, Report
Geological map of Ar Riyad, Saudi Arabia with geological legend and explanation....
Airborne geophysical survey of the Shaqra' quadrangle, sheet 25
U.S. Geological Survey Saudi Arabia Mission, Saudi Arabia. Deputy Ministry for Mineral Resources
1983, Report
Geological map of Shaqra', Saudi Arabia with geological legend and explanation....
An interpretation of gravity and aeromagnetic surveys of the Greater Jiddah area, Kingdom of Saudi Arabia
Mark E. Gettings, Gordon E. Andreasen
1983, Report
A gravity survey of the Jiddah area between lat 21°23' and 21°48' N., long 39°03' and 39°20' E., carried out in early 1977, covers an area of 744 km2 and includes 215 stations, at an average spacing of 1.9 km. The resulting simple Bouguer gravity anomaly map shows a series...
Plutonium speciation in water from Mono Lake, California
J.M. Cleveland, T.F. Rees, K.L. Nash
1983, Science (222) 1323-1325
The solubility of plutonium in Mono Lake water is enhanced by the presence of large concentrations of indigenous carbonate ions and moderate concentrations of fluoride ions. In spite of the complex chemical composition of this water, only a few ions govern the behavior of plutonium, as demonstrated by the fact...
Comment and reply on ‘Transgressive-regressive cycles and the occurrence of coal in some Upper Cretaceous strata of Utah’: Comment
James E. Fassett
1983, Geology (11) 736-737
No abstract available. ...
Strain‐rate profile across the Elsinore, San Jacinto, and San Andreas Faults near Palm Springs, California, 1973‐81
N.E. King, James C. Savage
1983, Geophysical Research Letters (10) 55-57
A profile of the strain accumulation rate along a line trending N50°E across the subparallel Elsinore, San Jacinto, and San Andreas faults near Palm Springs, California, has been constructed from trilateration surveys in the 1973‐81 interval. The strain accumulation is principally right‐lateral shear across a vertical plane parallel to fault...
Precision of geodolite surveys: A reply to Jackson and Cheng
James C. Savage, W.H. Prescott
1983, Journal of Geophysical Research B: Solid Earth (88) 10478-10484
Jackson and Cheng have suggested that the changes in areal dilatation measured in Geodolite surveys by the U.S. Geological Survey may be simply an artifact of the measuring system. Although systematic error could conceivably account for the observed excursions in dilatation, we maintain that the specific criticisms by Jackson and...
Strain accumulation in western United States
James C. Savage
1983, Annual Review of Earth and Planetary Sciences (11) 11-43
This review is principally concerned with recent geodetic strain measurements in western United States undertaken by the US Geological Survey as part of the earthquake studies program and, as a consequence, is heavily biased toward the author's own publications. Most of the publications reporting crustal-strain measurements in western United States...
A dislocation model of strain accumulation and release at a subduction zone
James C. Savage
1983, Journal of Geophysical Research B: Solid Earth (88) 4984-4996
Strain accumulation and release at a subduction zone are attributed to stick slip on the main thrust zone and steady aseismic slip on the remainder of the plate interface. This process can be described as a superposition of steady state subduction and a repetitive cycle of slip on the main...
The significance of diurnal terrestrial emergency of green turtles (Chelonia mydas) in the Gal?pagos Archipelago
H.L. Snell, Thomas H. Fritts
1983, Biotropica (15) 285-291
The diurnal, nonreproductive emergence of green turtles Chelonia mydas in Galapagos apparently occurs throughout the year on several islands. Turtles on beaches have cloacal temperatures that exceed temperatures of adjacent coastal waters. Basking turtles are predominately females. We hypothesize that females bask to accelerate digestion and fat build-up, necessary antecedents...
K-Ar ages and the opening of the South Atlantic Ocean: Basaltic rock from the Brazilian margin
R.V. Fodor, E.H. McKee, H.E. Asmus
1983, Marine Geology (54) M1-M8
New K-Ar ages for 13 samples of basalt, gabbro, wehrlite, and trachyandesite drilled from the Brazilian continental shelf and coastline yield information about the timing of the opening of the South Atlantic and the nature of the crust seaward from the Brazil...
Rhodamine-WT dye losses in a mountain stream environment
Kenneth E. Bencala, Ronald E. Rathburn, Alan P. Jackman, Vance C. Kennedy, Gary W. Zellweger, Ronald J. Avanzino
1983, Journal of the American Water Resources Association (19) 943-950
A significant fraction of rhodamine WT dye was lost during a short term multitracer injection experiment in a mountain stream environment. The conservative anion chloride and the sorbing cation lithium were concurrently injected. In-stream rhodamine WT concentrations were as low as 45 percent of that expected, based on chloride data....
Effect of retorted-oil shale leachate on a blue-green alga (Anabaena flos-aquae)
Diane M. McKnight, Wilfred E. Pereira, Colleen E. Rostad, Eric A. Stiles
1983, Bulletin of Environmental Contamination and Toxicology (30) 6-16
In the event of the development of the large oil shale reserves of Colorado, Utah, and Wyoming, one of the main environmental concerns will be disposal of retorted-oil shale which will be generated in greater volume than the original volume oI the mined oil shale. Investigators have found that leachates...
Chlorine-36 dating of saline sediments: Preliminary results from Searles Lake, California
F. M. Phillips, G.I. Smith, H.W. Bentley, D. Elmore, H.E. Gove
1983, Science (222) 925-927
Measurements have been made of the ratios of chlorine-36 to chlorine in five halite samples from Searles Lake sediments, previously dated by carbon-14, thorium-230, and magnetostratigraphic techniques. The ages calculated from the chlorine ratios are generally concordant with those from the other methods, implying the constancy of the chlorine input...
Three Mars years: Viking Lander 1 imaging observations
R. E. Arvidson, E.A. Guinness, H. J. Moore, J. Tillman, S. D. Wall
1983, Science (222) 463-468
The Mutch Memorial Station (Viking Lander 1) on Mars acquired imaging and meteorological data over a period of 2245 martian days (3:3 martian years). This article discusses the deposition and erosion of thin deposits (ten to hundreds of micrometers) of bright red dust associated with global dust storms, and the...
Dietary requirements for essential branched-chain amino acids by lake trout
S. G. Hughes, G. L. Rumsey, M.C. Nesheim
1983, Transactions of the American Fisheries Society (112) 812-817
In a 12‐week growth study of the dietary requirements of young lake trout Salvelinus namaycush for essential branched‐chain amino acids, the leucine requirement was between 2.74 and 3.66%, and the isoleucine requirement between 1.54 and 2.06%, of dietary protein (as‐fed basis). These ranges are substantially lower than those published and...
The relationship of joints and stream drainage in flat-lying rocks of south-central New York and northern Pennsylvania
H. A. Pohn
1983, Zeitschrift fur Geomorphologie (27) 375-384
Examination of the relationship of joints to stream development shows that the oft-cited development of streams parallel to joint directions does not, in general, apply in south-central New York and adjacent northern Pennsylvania. Streams whose courses are oblique to the joint directions (joint-oblique valleys) tend to erode...
Measuring water surface and streambed elevation changes with the acoustic velocity metering system
Antonius Laenen
1983, Water Resources Research (19) 1317-1322
Acoustic velocity metering systems used to measure the water velocity along a diagonal path across a stream can also be used to measure stage and streambed changes. Underwater acoustic transmissions reflected from the water surface can accurately measure depth above transducers. Similarly, signals reflected from the streambed can indicate streambed...
