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184334 results.

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Page 6175, results 154351 - 154375

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Searching for prehistoric earthquakes in lake sediments
J. Sims
1974, Earthquake Information Bulletin (USGS) (6) 3-9
How often do major earthquakes occur? Do they follow regular patterns of recurrence, and if so, what is the length of the recurrence interval? These questions are of obvious importance to populations located in regions where earthquakes are a commonplace occurrence. They are also relevant questions in regions that are...
Earthquake history of Nebraska
C. A. von Hake
1974, Earthquake Information Bulletin (USGS) (6) 32-33
Nebraska is in a region of moderate seismicity occasionally punctuated by rather strong earthquakes. Most of the State is seismic risk zone 1, with a small part in the southeast corner in risk zone 2. the first significant earthquake felt in Nebraska occurred in 1867, the year that statehood was...
Seismicity and earthquake hazards of the Wasatch Front, Utah
H. Spall
1974, Earthquake Information Bulletin (USGS) (6) 12-17
The impressive topographic break at the base of the Wasatch Range immediately east of Salt Lake City, Utah, marks the location where Mormon colonizer Brigham Young said in 1847. "This is the place" Actually, "the place" is termed the Wasatch Front because the Wasatch Range to the east, which rises...
Computer systems for automatic earthquake detection
S.W. Stewart
1974, Earthquake Information Bulletin (USGS) (6) 17-21
U.S Geological Survey seismologists in Menlo park, California, are utilizing the speed, reliability, and efficiency of minicomputers to monitor seismograph stations and to automatically detect earthquakes. An earthquake detection computer system, believed to be the only one of its kind in operation, automatically reports about 90 percent of all local...
Earthquake prediction; new studies yield promising results
R. Robinson
1974, Earthquake Information Bulletin (USGS) (6) 14-17
On Agust 3, 1973, a small earthquake (magnitude 2.5) occurred near Blue Mountain Lake in the Adirondack region of northern New York State. This seemingly unimportant event was of great significance, however, because it was predicted. Seismologsits at the Lamont-Doherty geologcal Observatory of Columbia University accurately foretold the time, place,...
Social behavior of breeding gadwalls in North Dakota
T.J. Dwyer
1974, The Auk (91) 375-386
Responses of duck pairs encountering other ducks were categorized by McKinney (1965a) as displays, attack, escape and avoidance, sexual pursuit, and sociability. Gadwalls (Anas strepera) show all these responses on the breeding grounds, and characteristic behavior patterns occur depending on the reproductive state of the birds involved. The responses of...
Mineral resources of Du Noir Addition, Washakie Wilderness area, Fremont County, Wyoming
Harold J. Prostka, J.C. Antweiler, Carl L. Bieniewski, M. D. Kleinkopf
1974, Open-File Report 74-133
The Du Noir Addition to the Washakie Wilderness area consists of 34,200 acres (13,840 hectares) of scenic mountainous terrain that adjoins the Teton Wilderness and Washakie Wilderness areas. The area was studied in 1973 by the U.S. Geological Survey and U.S. Bureau of Mines to evaluate its mineral, fuel, and...
Invertebrate macrobenthos of Lake Oahe, 1968-69
William E. Jones, James H. Selgeby
1974, Technical Paper 73
The benthos in Lake Oahe, as determined from about 450 bottom samples collected during the open water season in 1968 and 1969, was dominated by oligochaetes and chironomids; Caenis (Ephemeroptera) and Chaoborus (Diptera) were occasionally abundant. Total benthos was estimated at 3,600 organisms/mA? with an ash-free dry weight of about...
An experimental trap net fishery, Lake Oahe, South Dakota, 1965
James A. Gabel
1974, Technical Paper 82
Large trap nets were evaluated as a commercial gear for capturing buffalo fish during July-September 1965. During the 72-day fishing period, 13,171 fish weighing 21,669 kg were taken. Bigmouth buffalo (Ictiobus cyprinellus) and smallmouth buffalo (Ictiobus bubalus) dominated the catch (78.2% by weight). Eight sport species accounted for 3.6% of...
Naturally occurring vapor-liquid-solid (VLS) Whisker growth of germanium sulfide
R. B. Finkelman, R.R. Larson, E.J. Dwornik
1974, Journal of Crystal Growth (22) 159-160
The first naturally occurring terrestrial example of vapor-liquid-solid (VLS) growth has been observed in condensates from gases released by burning coal in culm banks. Scanning electron microscopy, X-ray diffraction, and energy dispersive analysis indicate that the crystals consist of elongated rods (≈ 100...
Myxosoma cerebralis: Isolation and concentration from fish skeletal elements - Sequential enzymatic digestions and purification by differential centrifugation
M.E. Markiw, K. Wolf
1974, Journal of the Fisheries Research Board of Canada (31) 15-20
An effective sequential procedure for recovery of Myxosoma cerebralis spores from infected trout was developed, and quantification of spores was carried out at each step of release and concentration. Methods are described for fresh and frozen material. Effective concentration of from 1100- to 9000-fold and an estimated efficiency of recovery of about...
Effect of feeding brown trout (Salmo trutta) a diet pelleted in dry and moist forms
H. A. Poston
1974, Journal of the Fisheries Research Board of Canada (31) 1824-1826
Growth rate, body composition, and intake of either dry matter or energy did not differ significantly (P > 0.05) between two groups of juvenile brown trout (Salmo trutta) fed either a low- or high-moisture semipurified diet at different rates to compensate for a diet energy density gradient. Feed/gain efficiency, on an as-fed...
In vitro and in vivo efficacy of potentiated sulfonamide in control of furunculosis in salmonids
G. L. Bullock, H. M. Stuckey, D. Collis, R. L. Herman, G. Maestrone
1974, Journal of the Fisheries Research Board of Canada (31) 75-82
In vitro and in vivo efficacy of a potentiated sulffonamide, Ro5–0037, for inhibition of Aeromonas salmonicida, causative agent of fish furunculosis was determined. The components of the potentiated sulfonamide, sulfadimethoxine, and ormetoprim were tested alone and in combination. In vitro results showed that both sulfonamide-resistant and sensitive strains of A. salmonicida had greater sensitivity...
Corynebacterial kidney disease of salmonids: Growth and serological studies on the causative bacterium
G. L. Bullock, H. M. Stuckey, P. K. Chen
1974, Applied Microbiology (28) 811-814
Comparative growth studies of 10 isolates of the Corynebacterium of salmonid kidney disease were quantified on four media. Greatest cell yield was obtained from Mueller-Hinton medium with 0.1% L-cysteine hydrochloride. Serological tests, in which rabbit antisera used against typical bacteria strains showed all to be antigenically homologous, provided a reliable method of...
Strain release mechanism of the 1906 San Francisco earthquake
W. Thatcher
1974, Science (184) 1283-1285
Reexamination of geodetic data has shown that aseismic slip occurred on or near the San Andreas fault in the period of about 20 years after 1906. The inferred displacements are comparable to but at greater depths than the sudden slip that occurred at the time of the earthquake. The postseismic...
Habitat management considerations for prairie chickens
L.M. Kirsch
1974, Wildlife Society Bulletin (2) 124-129
Lack of nesting and brood rearing habitat appears to be the universal limiting factor for prairie chickens (Tympanuchus cupido pinnatus) throughout their range. Grasslands are essential to prairie chickens, but vary widely in quality and thus in their ability to support prairie chickens. High-quality habitat is grassland providing residual vegetation...