Roosting ecology of the pallid bat, Antrozous pallidus
Terry A. Vaughan, Thomas J. O'Shea
1976, Journal of Mammalogy (57) 19-42
Daytime roosting behavior of pallid bats (Antrozous pallidus) was studied in central Arizona. Bats were present in the area from March or April until November and roosted in cliffs in colonies generally including 20 or more individuals. Pallid bats were highly selective in their choice of roost sites...
Application of multi-regional planning models to the scheduling of large-scale water resource systems development
D.W. Moody
1976, Journal of Hydrology (28) 101-125
No abstract available. ...
Structure and evolution of Bering Sea shelf south of St. Lawrence Island
Michael S. Marlow, David W. Scholl, Alan K. Cooper, E. C. Buffington
1976, AAPG Bulletin (60) 161-183
The virtually featureless Beringian shelf south of St. Lawrence Island is underlain structurally by at least 14 basins. Encompassing a total area of more than 300,000 sq km, most of the basins are either elongate structural sags, grabens, or half (asymmetric) grabens beneath the outer shelf. The regional trend of...
Plate tectonic model for the evolution of the eastern Bering Sea Basin
Alan K. Cooper, David W. Scholl, Michael S. Marlow
1976, GSA Bulletin (87) 1119-1126
The eastern Bering Sea Basin, composed of the Aleutian and Bowers Basins, is flanked to the north by Mesozoic foldbelts that probably represent zones of plate subduction in Mesozoic time. Present plate subduction occurs 400 to 1,000 km farther south, at the Aleutian Trench. North-south magnetic lineations that formed at...
Simulations of water-level drawdowns in proposed well-field areas, Dade County, Florida
Howard Klein
1976, Open-File Report 76-651
Electrical analog model simulations of hydraulic conditions in the Biscayne aquifer were made at proposed inland well-field sites in Dade County, Florida. Simulated drawdowns of water levels after 7 months of continuous pumping at 50, 100, and 150 million gallons per day were obtained at each site. Simultaneous pumping of...
Analog-model simulations for secondary canal controls and forward pumping water-management schemes in southeast Florida
E. H. Cordes, Richard Alfred Gardner
1976, Water-Resources Investigations Report 76-93
The analog model of the Biscayne aquifer of southeast Florida was used to approximate the effects of two proposed water-management schemes. One involved adding a secondary control structure in a major canal which is controlled near the coast. In the model the controls were operated in accordance with canal water...
A mathematical model for predicting river temperatures - application to the Green River below Flaming Gorge Dam
Jim J. Sartoris
1976, Report
No abstract available....
Computation of unsteady flows in rivers and estuaries by the method of characteristics
Chintu Lai, C. A. Onions
1976, Report
This report is a program documentation to the latest revision (1975) of the unsteady open-channel flow simulation model by the method of characteristics, Version 13 in the program series, which employs a multiple-reach scheme treating each subreach as a prismatic shape. A long waterway of variable cross section, properties and...
Flood frequency of Mississippi streams
B.E. Colson, James W. Hudson
1976, Report
Techniques have been developed for estimating future flood magnitudes having recurrence intervals as great as 100 years. Estimates for gaged sites were obtained by application of the log-Pearson Type III frequency distribution. Estimates for ungaged sites are defined by mathematical relations which may be solved using data from topographic maps....
Simulation of streamflow of Flambeau River at Park Falls, Wisconsin to define low-flow characteristics
William R. Krug
1976, Water-Resources Investigations Report 76-116
Daily streamflows of the Flambeau River at Park Falls, Wisconsin , were simulated for a 31-year period. Streamflow was simulated using a streamflow-routing model. These simulated daily flows were analyzed for summer (June 1-October 31) low-flow frequency. The resultant 7-day, 10-year summer low flow is 260 cubic feet per second....
Automation in photogrammetry: Recent developments and applications (1972-1976)
M.M. Thompson, E.M. Mikhail
1976, Photogrammetria (32) 111-145
An overview of recent developments in the automation of photogrammetry in various countries is presented. Conclusions regarding automated photogrammetry reached at the 1972 Congress in Ottawa are reviewed first as a background for examining the developments of 1972-1976. Applications are described for each country reporting significant developments. Among fifteen conclusions...
The Viking landing sites: Selection and certification
H. Masursky, N.L. Crabill
1976, Science (193) 809-812
During the past several years the Viking project developed plans to use Viking orbiter instruments and Earth-based radar to certify the suitability of the landing sites selected as the safest and most scientifically rewarding using Mariner 9 data. During June and July 1976, the Earth-based radar and orbital spacecraft observations...
Extended cabfac and Qmodel computer programs for Q-mode factor analysis of compositional data
J.E. Klovan, A.T. Miesch
1976, Computers & Geosciences (1) 161-178
The computer program CABFAC for Q-mode factor analysis of geologic data has been extended for use with data having constant row-sums. Another program, QMODEL, reads an output file from CABFAC and can be used to develop a variety of Q-mode models. The models serve to reproduce estimates of the original...
Resource data bases-Resource assessment
A. L. Clark
1976, Computers & Geosciences (2) 309-311
The U.S. Geological Survey's Office of Resource Analysis is developing computer methods for the handling of mineral-resources data in order to provide improved means for addressing and manipulating data. These methods include: computerized data files and predictive resource models. Data files contain the raw or disaggregated information on mineral deposits...
Exchange of Na+ and K+ between water vapor and feldspar phases at high temperature and low vapor pressure
R.O. Fournier
1976, Geochimica et Cosmochimica Acta (40) 1553-1561
In order to determine whether gas (steam) containing a small amount of dissolved alkali chloride is effective in promoting base exchange of Na+ and K+ among alkali feldspars and coexisting brine or brine plus solid salt, experiments were carried out at 400–700°C and steam densities ranging down to less than 0.05. For...
Intrinsic germanium detector used in borehole sonde for uranium exploration
F. E. Senftle, R.M. Moxham, A.B. Tanner, G. R. Boynton, P. W. Philbin, J.A. Baicker
1976, Nuclear Instruments and Methods (138) 371-380
A borehole sonde (~1.7 m long; 7.3 cm diameter) using a 200 mm2 planar intrinsic germanium detector, mounted in a cryostat cooled by removable canisters of frozen propane, has been constructed and tested. The sonde is especially useful in measuring X- and low-energy gamma-ray spectra (40–400 keV). Laboratory tests in...
Tectonic implications of space-time patterns of Cenozoic magmatism in the western United States
W.S. Snyder, W.R. Dickinson, M.L. Silberman
1976, Earth and Planetary Science Letters (32) 91-106
Locations of 2,100 radiometrically dated igneous rocks were plotted on a series of 20 maps, each representing an interval within the period 80 m.y. B.P. to present. Derivative maps showing the distributions in space and time of dated granitic intrusive rocks, silicic lavas and domes, ash-flow tuffs, andesitic-dacitic rocks, and...
Late Pleistocene and Holocene depositional trends, processes, and history of Astoria deep-sea fan, Northeast Pacific
H. Nelson
1976, Marine Geology (20) 129-173
The asymmetrical Astoria Fan (110 × 180 km) developed off the Columbia River and Astoria submarine canyon during the Pleistocene. Morphology, stratigraphy, and lithology have been outlined for a Pleistocene turbidite, and a Holocene hemipelagic sedimentary regime to generate geologically significant criteria for comparison with ancient equivalent deposits. Both gray...
Reduction of mare basalts by sulfur loss
R. Brett
1976, Geochimica et Cosmochimica Acta (40) 997-1004
Metallic Fe content and S abundance are inversely correlated in mare basalts. Either S volatilization from the melt results in reduction of Fe2+ to Fe0 or else high S content decreases Fe0 activity in the melt, thus explaining the correlation. All considerations favor the model that metallic iron in mare basalts is due...
Progress in remote sensing (1972-1976)
W. A. Fischer, W. R. Hemphill, Allan Kover
1976, Photogrammetria (32) 33-72
This report concerns the progress in remote sensing during the period 1972–1976. Remote sensing has been variously defined but is basically the art or science of telling something about an object without touching it. During the past four years, the major research thrusts have been in three areas: (1) computer-assisted enhancement and...
A study of alternative schemes for extrapolation of secular variation at observatories
L.R. Alldredge
1976, Physics of the Earth and Planetary Interiors (11)
The geomagnetic secular variation is not well known. This limits the useful life of geomagnetic models. The secular variation is usually assumed to be linear with time. It is found that attenative schemes that employ quasiperiodic variations from internal and external sources can improve the extrapolation of secular variation at...
The dissolution of calcite in CO2-saturated solutions at 25°C and 1 atmosphere total pressure
Niel Plummer, T.M.L. Wigley
1976, Geochimica et Cosmochimica Acta (40) 191-202
The dissolution of Iceland spar in CO2-saturated solutions at 25°C and 1 atm total pressure has been followed by measurement of pH as a function of time. Surface concentrations of reactant and product species have been calculated from bulk fluid data using mass transport theory and a model that accounts...
Observations of eruption clouds from Sakura-zima volcano, Kyushu, Japan from Skylab 4
J. D. Friedman, G. Heiken, D. Randerson, D.S. McKay
1976, Journal of Volcanology and Geothermal Research (1) 305-329
Hasselblad and Nikon stereographic photographs taken from Skylab between 9 June 1973 and 1 February 1974 give synoptic plan views of several entire eruption clouds emanating from Sakura-zima volcano in Kagoshima Bay, Kyushu, Japan. Analytical plots of these stereographic pairs, studied in combination with meteorological data, indicate that the eruption...
Constant potential pulse polarography
J. H. Christie, Larry L. Jackson, R. A. Osteryoung
1976, Analytical Chemistry (48) 561-564
The new technique of constant potential pulse polarography, In which all pulses are to be the same potential, is presented theoretically and evaluated experimentally. The response obtained is in the form of a faradaic current wave superimposed on a constant capacitative component. Results obtained with a computer-controlled system exhibit a...
Q-mode factor analysis of compositional data
A.T. Miesch
1976, Computers & Geosciences (1) 147-159
An extended form of the method of Q-mode factor analysis may be used if the rows of the data matrix sum to a constant. The constant row-sum provides a means for scaling the factor model to conform to the units of the original data in such forms as proportions, percentages,...
