Indexes associated with information theory in water quality
S.M. Zand
1976, Journal of the Water Pollution Control Federation (48) 2026-2031
In many biological studies of water quality, a diversity index is calculated in 'bits per individual' by using Shannon's Approximation to Brillouin's Formula. Difficulties associated with such use of Shannon's Formula and its associated parameters are discussed. Recent research has indicated that diversity indexes can be improved if (a) biological...
A note on the effect of fault gouge thickness on fault stability
J. Byerlee, R. Summers
1976, International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts (13) 35-36
At low confining pressure, sliding on saw cuts in granite is stable but at high pressure it is unstable. The pressure at which the transition takes place increases if the thickness of the crushed material between the sliding surfaces is increased. This experimental result suggests that on natural faults the...
Distribution of small channels on the Martian surface
D. Pieri
1976, Icarus (27) 25-50
The distribution of small channels on Mars has been mapped from Mariner 9 images, at the 1:5 000 000 scale, by the author. The small channels referred to here are small valleys ranging in width from the resolution limit of the Mariner 9 wide-angle images (???1 km) to about 10...
Hydrogen and oxygen isotope exchange reactions between clay minerals and water
J. R. O’Neil, Y.K. Kharaka
1976, Geochimica et Cosmochimica Acta (40) 241-246
The extent of hydrogen and oxygen isotope exchange between clay minerals and water has been measured in the temperature range 100–350° for bomb runs of up to almost 2 years. Hydrogen isotope exchange between water and the clays was demonstrable at...
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...
Thermomagnetic analysis of meteorites, 3. C3 and C4 chondrites
J.M. Herndon, M.W. Rowe, E.E. Larson, D.E. Watson
1976, Earth and Planetary Science Letters (29) 283-290
Thermomagnetic analysis was made on samples of all known C3 and C4 chondrites in a controlled oxygen atmosphere. Considerable variation was noted in the occurrence of magnetic minerals, comparable to the variation observed earlier in the C2 chondrites. Magnetite was found...
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...
Mineralogy of ash of some American coals: Variations with temperature and source
R.S. Mitchell, H.J. Gluskoter
1976, Fuel (55) 90-96
Ten samples of mineral-matter residue were obtained by the radio-frequency low-temperature ashing of subbituminous and bituminous coals. The low-temperature ash samples were then heated progressively from 400 °C to 1400 °C at 100 °C intervals. Mineral phases present at each temperature interval were determined by X-ray diffraction analyses. The minerals...
A land use and land cover classification system for use with remote sensor data
James R. Anderson, Ernest E. Hardy, John T. Roach, Richard E. Witmer
1976, Professional Paper 964
The framework of a national land use and land cover classification system is presented for use with remote sensor data. The classification system has been developed to meet the needs of Federal and State agencies for an up-to-date overview of land use and land cover throughout the country on a basis that is uniform...
Diurnal use of small wetlands by ducks
Albert T. Klett, L.M. Kirsch
1976, Journal of Wildlife Management (40) 351-353
Abstract has not been submitted...
Spring flow from pre-Pennsylvanian rocks in the southwestern part of the Navajo Indian Reservation, Arizona
M. E. Cooley
1976, Professional Paper 521-F
No abstract available....
Geohydrology and water supply, Shemya Island, Alaska
Alvin John Feulner, Chester Zenone, K. M. Reed
1976, Open-File Report 76-82
Sheyma Island, Alaska, was occupied as a military base in 1942. Since that time, potable water has been supplied by streams, lakes, wells, and in the late 1950's, a gallery system. The island is a low-lying, wave-cut platform composed of pyroclastic and volcanic rocks with some intrusives. Bedrock is overlain...
A method for estimating magnitude and frequency of floods in Montana
M. V. Johnson, R. J. Omang
1976, Open-File Report 75-650
This report provides methods for estimating flood characteristics at most natural flow sites on rural streams in Montana. It also contains significant flood data and related information for many gaged sites on Montana streams. Frequency curves are provided for 442 gaged sites as defined by log-Pearson Type III analysis. To...
Audio-magnetotelluric data log, station location map, and telluric profile data for the Elko Hot Springs Known Geothermal Resource Area (KGRA), Nevada
Donald B. Hoover, Gary W. Brougham, John Clark
1976, Open-File Report 76-152
No abstract available....
Conditions in the deeper parts of the hot spring systems of Yellowstone National Park, Wyoming
Alfred Hemingway Truesdell, Robert O. Fournier
1976, Open-File Report 76-428
Yellowstone thermal areas are scattered over an area of nearly 50 x 60 kilometers (Fig. 1) and contain waters of diverse compositions. This has lead to the implicit assumption that Yellowstone consisted of discrete hydrothermal systems (e.g., Fournier and Truesdell, 1970). It is the purpose of this paper to suggest...
Change in methylene blue active substances and chloride levels in streams in Suffolk County, New York, 1961-1976
Stephen E. Ragone, August A. Guerrera, W.J. Flipse Jr.
1976, Open-File Report 76-600
Since 1961, concentrations of methylene blue active substances and chloride were measured in samples collected at 67 sampling stations on 44 streams in Suffolk County, Long Island, New York. Changes in the concentrations of these constituents and calculated chloride/methylene blue active substances ratios are reported. Although many factors--the 1962 to...
Radiocarbon dates from Alaska, Yukon Territory, and British Columbia
Frederic H. Wilson, M. Springer Young
1976, Report
No abstract available....
Earthquake at 40 feet
G. J. Miller
1976, Earthquake Information Bulletin (USGS) (8) 24-25
The earthquake that struck the island of Guam on November 1, 1975, at 11:17 a.m had many unique aspects-not the least of which was the experience of an earthquake of 6.25 Richter magnitude while at 40 feet. My wife Bonnie, a fellow diver, Greg Guzman, and I were diving at...
Earthquake prediction; fact and fallacy
R.N. Hunter
1976, Earthquake Information Bulletin (USGS) (8) 24-27
Earthquake prediction is a young and growing area in the field of seismology. Only a few years ago, experts in seismology were declaring flatly that it was impossible. Now, some successes have been achieved and more are expected. Within a few years, earthquakes may be predicted as routinely as the...
Is there a periodicity in the occurrence of earthquakes?
R.N. Hunter
1976, Earthquake Information Bulletin (USGS) (8) 4-7
Various periodicities have been suspected in earthquake activity, but none has yet been proved. In his classic text on seismology, K.E Bullen remarked that small but discernable "trigger" forces, such as tidal effects, temperature changes or barometric changes, have been thought to act as "last straw" phenomena when the earthquake...
Training seismic research observatory station operators
C. R. Hutt
1976, Earthquake Information Bulletin (USGS) (8) 13-17
Threat of eruption at La Soufriere
R.S. Fiske
1976, Earthquake Information Bulletin (USGS) (8) 27-29
The Talas-Fergana Fault, Kirghiz and Kazakh, USSR
R. E. Wallace
1976, Earthquake Information Bulletin (USGS) (8) 4-13
The great Talas-Fergana fault transects the Soviet republic of Kirghiz in Soviet Central Asia and extends southeastward into China and northwestward into Kazakh SSR (figs. 1 and 2). This great rupture in the Earth's crust rivals the San Andreas fault in California; it is long (approximately 900 kilometers), complex, and...
Geologic mapping and earthquakes in southeastern Idaho
L.B. Platt
1976, Earthquake Information Bulletin (USGS) (8) 8-12
On April 14, 1973, a magnitude 4.75 earthquake occurred in Oneida County, Idaho. The intensity of ground motion was too slight to cause damage, and local interest in this event was so slight that it was not even noted in the weekly newspaper, the Idaho Enterprise, published in Malad City, the...
Geothermal energy in the United States; Part II, Assessment of resources
D.L. Williams
1976, Earthquake Information Bulletin (USGS) (8) 18-23
Geothermal energy-from heat deep inside the Earth- is a vast potential source of power. This article is the second part of a series on geothermal energy, the first part of which was in volume 8, number 1, of the Earthquake Information Bulletin (January-February 1976). Part 1 of this series described the...
