Earthquakes; January-March 1976
W. J. Person
1976, Earthquake Information Bulletin (USGS) (8) 24-27
The year 1976 started out quite active, seismically. Four major earthquakes occurred in different parts of the world during the first 3 months of the year. Three earthquakes rattled the western rim of the Pacific Ocean from the Kuril Islands to the Kermadec Islands. The fourth major earthquake struck Guatemala,...
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...
Earthquakes, April-May 1976
W. J. Person
1976, Earthquake Information Bulletin (USGS) (8) 28-30
This was an active period, seismically speaking, with four major earthquakes and a number of strong earthquakes in many parts of the world. Northern Italy experienced one of its most destructive earthquakes in many years. Ecuador suffered fatalities and damage from a strong quake. Uzbek SSR was struck by two...
A method and fortran program for quantitative sampling in paleontology
J.C. Tipper
1976, Computers & Geosciences (1) 195-201
The Unit Sampling Method is a binomial sampling method applicable to the study of fauna preserved in rocks too well cemented to be disaggregated. Preliminary estimates of the probability of detecting each group in a single sampling unit can be converted to estimates of the group's volumetric abundance by means...
Earthquake history of South Carolina
C. A. von Hake
1976, Earthquake Information Bulletin (USGS) (8) 34-38
An estimated $23 million damage was caused by one of the great earthquakes in United States history in 1886. Charleston, S.C, and nearby cities suffered most of the damage, although points as far as 160 km away were strongly shaken. Many of the 20 earthquakes of intensity V or greater...
Earthquake history of Oregon
C. A. von Hake
1976, Earthquake Information Bulletin (USGS) (8) 30-33
Although situated between two States (California and Washington) that have has many violent earthquakes, Oregon is noticeably less active seismically. the greatest damage experienced resulted from a major shock near Olympia, Wash., in 1949. During the short history record available (since 1841), 34 earthquakes of intensity V, Modified Mercalli Scale,...
A revised “earthquake report” questionnaire
C. Stover, G. Reagor, R. Simon
1976, Seismological Research Letters (8) 18-22
The revised “Earthquake Report” questionnaire introduced here is designed to restrict the replies on the effects of earthquakes as closely as possible to a set of effects that can be evaluated by use of a computer program. Differences in intensity resulting from evaluation by different individuals using their own qualitative...
Earthquakes June-July 1976
W. J. Person
1976, Earthquake Information Bulletin (USGS) (8) 31-33
This was a seismically active period, with one great earthquake, four major earthquakes, and several strong shocks worldwide. Many persons were killed and thousands were injured in three separate events-in West Irian (west New Guinea), in Bali, Indonesia, and in northeastern China. A great earthquake (one with a Richter magnitude 8.0...
The area of influence of an exploratory hole
D.A. Singer, L. J. Drew
1976, Economic Geology (71) 642-647
A method is presented for calculating the area of influence of exploratory drill holes by using the size and shape of resource targets. The solution presented is for elliptical and circular targets, but the method is applicable to any shaped target. The degree to which points have been explored depends...
Feeding ecology of breeding gadwalls on saline wetlands
J.R. Serie, G.A. Swanson
1976, Journal of Wildlife Management (40) 69-81
The feeding ecology of breeding gadwalls (Anas strepera) from saline wetlands in North Dakota was examined in relation to sex, pair mates, reproductive status, food availability, and wetland type during the spring and summer of 1971 and 1972. Esophagi of males and females contained 40.4 and 48.2 percent animal food,...
Antimycin: Uptake, distribution, and elimination in brown bullheads (Ictalurus nebulosus)
D.P. Schultz, P.D. Harman
1976, Journal of the Fisheries Research Board of Canada (33) 1121-1129
Radioactive antimycin was readily taken up in bile and tissues of brown bullheads (Ictalurus nebulosus) exposed to 0.045 μg/ml of 14C-antimycin for as long as 48 h. Bile contained the most and blood the least radioactivity at all sampling periods. The highest concentration of 14C-antimycin in muscle was 0.12 μg/g, after 12 h of exposure. The...
Submarine geothermal resources
D.L. Williams
1976, Journal of Volcanology and Geothermal Research (1) 85-100
Approximately 20% of the earth's heat loss (or 2 ?? 1012 cal/s) is released through 1% of the earth's surface area and takes the form of hydrothermal discharge from young (Pleistocene or younger) rocks adjacent to active seafloor-spreading centers and submarine volcanic areas. This amount is roughly equivalent to man's...
Land use and land cover map for Cartersville, Georgia
Water Resources Division, U.S. Geological Survey
1976, Open-File Report 76-130
No abstract available....
Earthquake history of Pennsylvania
C. A. von Hake
1976, Earthquake Information Bulletin (USGS) (8) 28-31
Record of early earthquakes in Northeastern United States provide limited information on effects in pennsylvania until 1737, 55 years after the first permanent settlement was established. A very severe earthquake that centered in the St.Lawrence River region in 1663 may have been felt in Pennsylvania, but historical accounts are not...
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...
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...
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...
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...
Determination of lead in rocks by radiometric isotope dilution and substoichiometric extraction
Philip Aruscavage
1976, Analytica Chimica Acta (82) 343-348
A rapid procedure is described for the determination of lead in rocks by an isotope-dilution substoichiometric method. After the sample has been digested with acid in the presence of 210Pb tracer, the lead is separated by dithizone extractions. After the lead has been back-extracted into aqueous solution, it is reacted with...
An outbreak of erysipelas in eared grebes (Podiceps nigricollis)
Wayne I. Jensen, Sally E. Cotter
1976, Journal of Wildlife Diseases (12) 583-586
An outbreak of erysipelas killed an estimated 5,000 aquatic birds on Great Salt Lake (Utah) in late November, 1975. Although several thousand ducks and gulls were using the lake, at least 99 percent of the victims were eared grebes. A hypothetical explanation for the selective mortality is offered....
Foraminiferal biostratigraphy of the shelf edge: a key to late Quaternary paleoenvironments
C. Wylie Poag, B.R. Sidner
1976, Palaeogeography, Palaeoclimatology, Palaeoecology (19) 17-37
Foraminiferal assemblages in eight piston cores from West Flower Garden Bank at the edge of the Texas continental shelf contain a nearly complete record of late Quaternary paleoclimatic and geologic events. The faunas are divisible into three distinct successive biofacies on the basis of both planktonic and benthic foraminifers: the...
Zoned Cr, Fe-spinel from the La Perouse layered gabbro, Fairweather Range, Alaska
G.K. Czamanske, G. R. Himmelberg, F.E. Goff
1976, Earth and Planetary Science Letters (33) 111-118
Zoned spinel of unusual composition and morphology has been found in massive pyrrhotite-chalcopyrite-pent-landite ore from the La Perouse layered gabbro intrusion in the Fairweather Range, southeastern Alaska. The spinel grains show continuous...
Hydrologic data for Cow Bayou, Brazos River Basin, Texas, 1974
J. K. VanZandt
1976, Report
No abstract available....
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...
RESIN, a FORTRAN IV program for determining the area of influence of samples or drill holes in resource target search
D.A. Singer
1976, Computers & Geosciences (2) 249-260
A FORTRAN IV program that calculates the area of influence of drill holes or samples with respect to the size and shape of elliptical or circular resource targets is presented. Program options include determination of the degree to which areas within a region have been explored and estimation of probabilities...
