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...
Opaque minerals as aids in distinguishing between source and sorting effects on beach sand mineralogy in southwestern Oregon
G. Luepke
1980, Journal of Sedimentary Petrology (50) 489-496
Both source area and wave sorting affect the heavy-mineral distributions of beach sands. Although source and sorting effects are difficult to distinguish, they can be separated on four Oregon beaches by studying the magnetic fraction of the sand. Prominent headlands bound the four...
Some constraints on levels of shear stress in the crust from observations and theory
Art McGarr
1980, Journal of Geophysical Research Solid Earth (85) 6231-6238
In situ stress determinations in North America, southern Africa, and Australia indicate that on the average the maximum shear stress increases linearly with depth to at least 5.1 km measured in soft rock, such as shale and sandstone, and to 3.7 km in hard rock, including granite and quartzite. Regression...
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...
Effects of sea lamprey (Petromyzon marinus) control in the Great Lakes on aquatic plants, invertebrates and amphibians
P.A. Gilderhus, B. G. H. Johnson
1980, Canadian Journal of Fisheries and Aquatic Sciences (37) 1895-1905
The chemicals 3-trifluoromethyl-4-nitrophenol (TFM) or a combination of TFM and 2a??,5-dichloro-4a??-nitrosalicylanilide (Bayer 73) have been used to control the sea lamprey (Petromyzon marinus) in the Great Lakes for about 20 yr. These chemicals cause some mortalities of Oligochaeta and Hirudinea, immature forms of Ephemeroptera (Hexagenia sp.), and certain Trichoptera, Simuliidae,...
Role of physical barriers in the control of sea lamprey (Petromyzon marinus)
J. B. Hunn, W.D. Youngs
1980, Canadian Journal of Fisheries and Aquatic Sciences (37) 2118-2122
Mechanical and electromechanical barriers played a significant role in the initial attempts to control sea lamprey (Petromyzon marinus) populations in the upper Great Lakes. More recently electromechanical weirs have been used to assess the relative abundance of spawning-run sea lampreys in Lake Superior. Development of an integrated control approach to...
Development of sea lamprey (Petromyzon marinus) larvicides
John H. Howell, John J. Lech, John L. Allen
1980, Canadian Journal of Fisheries and Aquatic Sciences (37) 2103-2107
Larvicides are used to control sea lamprey (Petromyzon marinus) in the Great Lakes. These larvicides are useful because they are more toxic to sea lamprey than fish species found in the same habitat. The lampricides come from two classes of chemical compounds: (1) halonitrophenols, and (2) halonitrosalicylanilides. Selectivity of the...
Fission-track age of the Mangaroa ash and tectonic implications at Wellington, New Zealand.
C. W. Naeser, S. Nishimura, Te Punga
1980, New Zealand Journal of Geology and Geophysics (23) 615-621
Three samples of zircon from the Mangaroa Ash, an important marker bed in the late Pleistocene deposits of the Wellington area, have been dated by fission-track analysis. The average age of the 3 zircon samples is 380 000 years. Since this tephra fell, vertical uplift at Tinakori Hill on the...
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...
What can grade-tonnage relations really tell us?
Donald A. Singer, John H. DeYoung Jr.
1980, Conference Paper, International Geological Congress, 26th, Colloquia C1, Mineral Resources
No abstract available....
The earthquake educational institute at San Francisco State University
R. Sullivan, R. Pestrong, H. Strongin
1980, Earthquake Information Bulletin (USGS) (12) 174-176
The Earthquake Educational Institute was established in 1978 at San Francisco State University under a grant from the U.S National Science Foundation. The goal of the Institute is to develop earthquake-related curricula for use in elementary and secondary schools in the hope that, by educating students about earthquakes, they will...
Hydrogeologic data for Eureka Springs landfill and adjacent area, north-central Hillsborough County, Florida, 1969-73
A. D. Duerr, Joseph William Stewart
1980, Open-File Report 80-70
Well location and construction data are summarized for 218 wells in the Eureka Springs landfill and adjacent areas in north-central Hillsborough County, FL. Most of the data are for 88 wells within the immediate vicinity of the landfill. Water-quality data are presented for 93 of the wells and 13 surface-water...
Jupiter and the Voyager mission
L. Soderblom
Henry Spall, editor(s)
1980, Earthquake Information Bulletin (USGS) (12) 128-130
In 1977, the United States launched two unmanned Voyager spacecraft that were to take part in an extensive reconnaissance of the outer planets over a 12-year period visiting the environs of Jupiter, Saturn, Uranus, and Neptune. Their first encounter was with the complex Jupiter planetary system 400 million miles away....
Earthquake alarm; operating the seismograph station at the University of California, Berkeley
B. Stump
1980, Earthquake Information Bulletin (USGS) (12) 88-97
Monitoring active volcanoes
R.I. Tilling
1980, Earthquake Information Bulletin (USGS) (12) 131-134
One of the most spectacular, awesomely beautiful, and at times, most destructive displays of natural energy is an erupting volcano, belching fume and ash thousands of feet into the atmoshpehere and pouring out red-hot molten lava in fountains and streams. ...
A traveling earthquake exhibit
N. T. Hall, J. Glare
1980, Earthquake Information Bulletin (USGS) (12) 181-184
Earthquakes; March-April 1980
W. J. Person
1980, Earthquake Information Bulletin (USGS) (12) 228-231
Two of the three major (7.0-7.9) earthquakes during this reporting period occurred in the South Pacific on March 8 and April 13. The third, in the Fox Islands, Aleutian Islands, on March 23, was the first major earthquake of the year in the United States. In the State of Washington,...
An economical educational seismic system
J. D. Lehman
1980, Earthquake Information Bulletin (USGS) (12) 197-199
There is a considerable interest in seismology from the nonprofessional or amateur standpoint. The operation of a seismic system can be satisfying and educational, especially when you have built and operated the system yourself. A long-period indoor-type sensor and recording system that works extremely well has been developed in the...
Volcano hazards; lessons learned in the eastern Caribbean
R.S. Fiske
1980, Earthquake Information Bulletin (USGS) (12) 150-154
San Juan Bautista earthquake walk
N. T. Hall, J. Glare
1980, Earthquake Information Bulletin (USGS) (12) 195-196
Changes in mortality of lake trout (Salvelinus namaycush) in Michigan waters of Lake Superior in relation to sea lamprey (Petromyzon marinus) predation, 1968-78
Richard L. Pycha
1980, Canadian Journal of Fisheries and Aquatic Sciences (37) 2063-2073
Total mortality rates of lake trout (Salvelinus namaycush) of age VII and older from eastern Lake Superior were estimated from catch curves of age distributions each year in 1968–78. The instantaneous rate of total mortality Z varied from 0.62 to 2.31 in close synchrony with sea lamprey (Petromyzon marinus) wounding rates on lake...
The nature of fracturing and stress distribution in quartzite around the 1128-M (3700-FT) level of the crescent mine, Coeur d'Alene mining district, Idaho
C.H. Miller, E.H. Skinner
1980, Engineering Geology (16) 321-338
Silver and copper are the principal ores mined from the quartzite at the Crescent mine. Both the main ore-bearing veins and foliation in the quartzite are parallel to the nearly vertical formational contacts. Anisotropy of the quartzite is indicated by both dynamic and static tests. Disking and breakage of core...
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....
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...
Reproductive success and nest attentiveness of mallard ducks fed Aroclor 1254
T. W. Custer, G. H. Heinz
1980, Environmental Pollution Series A: Ecological and Biological (21) 313-318
A dietary dosage of 25 ppm Aroclor 1254 fed to nine-month-old mallards Anas platyrhynchos for at least a month before egg-laying had no detrimental effect on reproductive success or nest attentiveness when hens were allowed to incubate their own eggs. The treatment caused no effect on number of hens laying, date of...
