Geodetic measurement of horizontal deformation across the Rio Grande rift near Socorro, New Mexico
J.C. Savage, M. Lisowski, W.H. Prescott, A.R. Sanford
1980, Journal of Geophysical Research Solid Earth (85) 7215-7220
Trilateration surveys of a geodetic network across the Rio Grande rift near Socorro, New Mexico, in 1972, 1973, 1976, and 1979 have failed to detect any significant strain accumulation. The surveys place an upper bound (95% confidence limit) of 1 mm/a (a = years) on east-west spreading cross the rift...
Speculations on processes responsible for mesoscale current lineations on the continental shelf, southern California
Herman A. Karl
1980, Marine Geology (34) M9-M18
A side-scan sonar survey of San Pedro shelf, California, reveals areas of mesoscale current lineations oriented approximately north-northeast in water depths of 20-25 m. Widths of sand ribbons range from 40 to 120 m and intervening erosional furrows, from 15 to 50 m. A conceptual model shows that the scale...
Distribution of Quaternary rhyolite domes of the Coso Range, California: implications for extent of the geothermal anomaly.
C. R. Bacon, W. A. Duffield
1980, Journal of Geophysical Research (85) 2425-2433
38 separate domes and flows of phenocryst-poor, high-silica rhyolite of similar major element chemical composition were erupted over the past 1My from vents arranged in a crudely S-shaped array atop a granitic horst in the Coso Range, California. Most of the extrusions are probably less than about 0.3My old. The...
Comment on 'A reinterpretation of the linear heat flow and heat production relationship for the exponential model of the heat production in the crust' by R.N. Singh & J.G. Negi.
A.H. Lachenbruch
1980, Geophysical Journal of the Royal Astronomical Society (63) 791-795
In their recent paper, Singh & Negi, (This journal, 57, 741-744) contend that if thd slope of the empirical linear relation between heat flow and heat production is interpreted as the decay-length of an exponential depth-distribution of sources, a discrepancy rises, whereas if it is interpreted as the depth of...
Distribution of modern benthic foraminifers on the New Jersey Outer Continental Shelf
C. Wylie Poag, H.J. Knebel, R. Todd
1980, Marine Micropaleontology (5) 43-69
We used samples from 21 stations within a 600 km2 area of the New Jersey Outer Continental Shelf to assess the effects of a hydrodynamic environment on the distribution and redistribution of benthic foraminifers. These samples show that, although the predominant genera (Elphidium, Cibicides, and Saccammina) are the same as...
Geochemical exploration for uranium in playas
D. L. Leach, K.P. Puchlik, R.K. Glanzman
1980, Journal of Geochemical Exploration (13) 251-283
Playas and closed-basin lakes represent unique geochemical environments for the entrapment and concentration of mobile chemical elements. For this reason, playas may be considered as potentially favorable areas for the accumulation of uranium. We investigated playa sediments to determine their value as possible sample media for determining the presence...
Flood risks and the willingness to purchase flood insurance
M.R. Karlinger, E. D. Attanasi
1980, Water Resources Research (16) 617-622
Computer simulation experiments were conducted to determine the effects of alternative sources of uncertainty on the willingness to pay for flood insurance. Two alternative insurance protection schemes were investigated: coinsurance and fixed coverage. The question investigated here is to what extent does the insurance scheme influence how purchasers respond to...
Geochemistry, strontium isotope data, and potassium-argon ages of the andesite-rhyolite association in the Padang area, West Sumatra
G. W. Leo, C. E. Hedge, R. F. Marvin
1980, Journal of Volcanology and Geothermal Research (7) 139-156
Quaternary volcanoes in the Padang area on the west coast of Sumatra have produced two-pyroxene, calc-alkaline andesite and volumetrically subordinate rhyolitic and andesitic ash-flow tuffs. A sequence of andesite (pre-caldera), rhyolitic tuff and andesitic tuff, in decreasing order of age, is related to Maninjau caldera. Andesite compositions range from 55.0...
Quantile estimation with more or less floodlike distributions
J. Maciunas Landwehr, N.C. Matalas, J.R. Wallis
1980, Water Resources Research (16) 547-555
The desirable properties of an estimator relative to a hypothetical population may be irrelevant in practice unless the population at issue more or less resembles the hypothetical population. Evidence that floods are distributed with long, stretched upper tails suggests that use of the more common distributions results in a rather...
Geochemical evolution of brines in the Salar of Uyuni, Bolivia.
S.L. Rettig, B.F. Jones, F. Risacher
1980, Chemical Geology (30) 57-79
Recent analyses of brines from the Salars of Uyuni and Coipasa have been compared with published data for Lakes Titicaca and Poopo to evaluate solute compositional trends in these remnants of two large Pleistocene lakes once connected by overflow from the N to the S of the Bolivian Altiplano. From...
Studies of San Francisco Bay by the U.S. Geological Survey
R. T. Cheng, T. J. Conomos
1980, Conference Paper, Proceedings, 26th annual meeting of the institute of environmental sciences
No abstract available ...
Toxicity of five forest insecticides to cutthroat trout and two species of aquatic invertebrates
D. F. Woodward, W.L. Mauck
1980, Bulletin of Environmental Contamination and Toxicology (25) 846-854
The Northern Rocky Mountain region has had scattered infestation of the western spruce budworm Christoneura occidentalis since the early 1900's (U.S. DEPARTMENT OF AGRICULTURE (USDA) 1976b). On the basis of aerial surveys in 1975, TUNNOCK et al. (1976), estimated that budworm defoliation occurred on 2,278,804 acres of six National Forests...
Sedimentary and structural patterns on the northern Santa Rosa-Cortes Ridge, southern California
Michael E. Field, William C. Richmond
1980, Marine Geology (34) 79-98
The Santa Rosa-Cortes Ridge is an 1800 m high, 180 km long feature lying approximately 90 km off the coast of southern California and directly south of the northern group of Channel Islands. Geophysical profiling and sampling cruises to the northern part of the ridge, an area of recent and...
Calculation of uncertainties of U-Pb isotope data
K.R. Ludwig
1980, Earth and Planetary Science Letters (46) 212-220
Equations are derived for the estimation of errors and error correlations for various types of U-Pb isotope data, taking into account ion-beam instabilities, run-to-run variability in mass-discrimination, uncertainties in Pb and U concentrations, and uncertainties in initial-Pb and blank-Pb amount and isotopic composition. Equations are also given for the calculation...
Mount St. Helens Volcano
D. R. Crandell, D. R. Mullineaux
1980, Earthquake Information Bulletin (USGS) (12) 135-140
Food of alewives, yellow perch, spottail shiners, trout-perch, and slimy and fourhorn sculpins in southeastern Lake Michigan
LaRue Wells
1980, Report
Stomachs of 1, 064 alewives (Alosa pseudoharengus), 1, 103 yellow perch (Perca flavescens), 246 spottail shiners (Notropis hudsonius), 288 trout-perch (Percopsis omiscomaycus), 454 slimy sculpins (Cottus cognatus), and 562 fourhorn sculpins (Myoxocephalus quadricornis) from Lake Michigan were examined for food contents. Fish were sampled primarily from March to November and...
Girl Scouts promote earthquake awareness
C. Campbell
1980, Earthquake Information Bulletin (USGS) (12) 177-180
Chlorinated hydrocarbons as a limiting factor in the reproduction of lake trout in Lake Michigan
Wayne A. Willford
1980, Conference Paper, Proceedings of the third USA-USSR Symposium on the Effects of Pollutants Upon Aquatic Ecosystems : theoretical aspects of aquatic toxicology
No abstract available....
Enumeration of prairie wetlands with Landsat and aircraft data
D.S. Gilmer, E.A. Work Jr., J.E. Colwell, D.L. Rebel
1980, Photogrammetric Engineering and Remote Sensing (46) 631-634
A method is described for making an estimate of wetland numbers in the glaciated prairie region. A double-phase sampling approach is used which consists of first making a total census of wetlands using Landsat data, and then adjusting the Landsat results on the basis of samples derived from high resolution...
Notes on sedimentation activities calendar year 1979
U.S. Interagency Advisory Committee on Water Data- Subcommittee on Sedimentation
1980, Report
This report is a digest of information furnished by Federal Agencies on sedimentation investigations, both ongoing and planned. Included in the report are a review of important findings, new methodologies, new publications, laboratory and other research activities, and other pertinent information. The material is organized on the basis of the...
Notes on sedimentation activities calendar year 1978
U.S. Interagency Advisory Committee on Water Data- Subcommittee on Sedimentation
1980, Report
This report is a digest of information furnished by Federal agencies conducting sedimentation investigations on work in progress or planned, important findings, new methods, new publications, laboratory and other research activities, and other pertinent information. The material has been organized by major drainage regions in the conterminous United States,Alaska, Hawaii,...
Tectonic state: its significance and characterization in the assessment of seismic effects associated with reservoir impounding
R. O. Castle, M. M. Clark, A. Grantz, J.C. Savage
1980, Engineering Geology (15) 53-99
Any analysis of seismicity associated with the filling of large reservoirs requires an evaluation of the natural tectonic state in order to determine whether impoundment is the basic source, a mechanically unrelated companion feature, or a triggering stimulus of the observed seismicity. Several arguments indicate that the associated seismicity is...
Aerial photography summary record system - five years later.
T.J. Lauterborn
1980, Photogrammetric Engineering and Remote Sensing (46) 1537-1539
Describes the APSRS, an automated information system for conventional aerial photography projects, established after the formation of the National Cartographic Information Center in the US Geological Survey in 1974. -after Author...
Map showing water circulation and rates of sedimentation in the Port Isabel 1 degree by 2 degrees quadrangle, Texas
H. L. Berryhill Jr., A. R. Trippet
1980, IMAP 1254-A
No abstract available....
Deer distribution in relation to wolf pack territory edges
L. David Mech, Deanna K. Dawson, James M. Peek, M. Korb, L.L. Rogers
1980, Journal of Wildlife Management (44) 253-258
No abstract available. ...
