Parkfield Earthquake looks to be on schedule
1986, Earthquakes & Volcanoes (USGS) (18) 149-150
The only formally endorsed prediction of an earthquake in the Unites States appears to be holding up well. The magnitude 5.6 Parkfield Earthquake, expected to strike a section of the San Andreas in sparsely populated central California in January 1988, give or take 5 years, would appear to be on...
Measurement of nitrous oxide reductase activity in aquatic sediments
L.G. Miller, Ronald S. Oremland, S. Paulsen
1986, Applied and Environmental Microbiology (51) 18-24
Denitrification in aquatic sediments was measured by an N2O reductase assay. Sediments consumed small added quantities of N2O over short periods (a few hours). In experiments with sediment slurries, N2O reductase activity was inhibited by O2, C2H2, heat treatment, and by high levels of nitrate (1 mM) or sulfide (10...
Research in earthquake prediction - the Parkfield prediction experiment
Henry Spall
1986, Earthquakes & Volcanoes (USGS) (18) 148-148
The 15-mile-long Parkfield, California, section of the Sam Andreas fault is the best understood earthquake source region in the world. Moderate-sized earthquakes of local magnitude 5 3/4 occurred at Parkfield in 1881, 1901, 1922, 1934, and 1966....
Effect of seasonally changing tissue weight on trace metal concentrations in the bivalve Macoma balthica in San Francisco Bay
Daniel J. Cain, Samuel N. Luoma
1986, Marine Ecology Progress Series (28) 209-217
The influence of seasonal changes in the weight of soft tissues on temporal fluctuations in tissue concentrations of Cu and Zn was examined in 4 populations of the clam Macoma balthica sampled in San Francisco Bay for a period of 2 to 5 yr. Fluctuations in metal concentration expected from...
Paleomagnetism and K-Ar ages of volcanic rocks from Long Valley caldera, California
Edward A. Mankinen, C. Sherman Gromme, G. Brent Dalrymple, Marvin A. Lanphere, Roy A. Bailey
1986, Journal of Geophysical Research B: Solid Earth (91) 633-652
Paleomagnetic measurements and K‐Ar age determinations on volcanic rocks from Long Valley caldera, California, have enabled further refinement of eruptive activity within this large silicic volcanic center. K‐Ar age determinations show that postcaldera volcanic eruptions began 0.73 m.y. ago and continued periodically until about 50,000 years ago. The eruptions were...
Susceptibility of salmonids to furunculosis: Differences between serum and mucus responses against Aeromonas salmonicida
R. C. Cipriano, Charles M. Heartwell III
1986, Transactions of the American Fisheries Society (115) 83-88
At the Reeds Creek (West Virginia) state hatchery, mortality from enzootic furunculosis is most severe among brown trout Salmo trutta, intermediate in brook trout Salvelinus fontinalis, and virtually nonexistent in rainbow trout Salmo gairdneri. In each species, survivors of epizootics had developed similar levels of protective antibodies in their sera...
Relationship of grade, tonnage, and basement lithology in volcanic-hosted epithermal precious-and base-metal quartz-adularia-type districts
D.L. Mosier, Donald A. Singer, T. Sato, N.J. Page
1986, Mining Geology (36)
Examination of grades, tonnages, and basement rocks for 88 epithermal precious- and base-metal quartz-adularia-type districts in North, Central, and South America, and Japan reveals that the type of basement rock below the mineralized veins is useful for predicting grade and size of deposits. Epithermal districts overlying basement with salt and...
Levels of time information in weathering measurements, with examples from weathering rinds on volcanic clasts in the Western United States
Steven M. Coleman, David P. Dethier
Steven M. Coleman, David P. Dethier, editor(s)
1986, Book chapter, Rates of chemical weathering of rocks and minerals
No abstract available....
Rates of chemical weathering of rocks and minerals
Steven M. Colman, David P. Dethier, editor(s)
1986, Book
Researchers in geomorphology, geochemistry, quaternary geology, soil science, and mineralogy will welcome this volume, the first to focus exclusively on rates of silicate chemical weathering. Consisting largely of previously unpublished data from six countries, the volume examines the latest experimental, modelling, and field results.New information is presented on topics of...
Paleomagnetism of the Tertiary Clarno Formation of central Oregon and its significance for the tectonic history of the Pacific Northwest
C. Sherman Gromme, Myrl E. Beck Jr., Ray E. Wells, David C. Engebretson
1986, Journal of Geophysical Research B: Solid Earth (91) 14089-14103
The Clarno Formation, a mostly Eocene and partly early Oligocene sequence of andesitic lavas and volcaniclastic rocks, is the oldest Tertiary formation exposed in north central Oregon. Remanent magnetization directions at 46 sites in the lavas provide a paleomagnetic pole at 84°N, 278°E with a 95% confidence cone of 7°....
Techniques for studying nest success of ducks in upland habitats in the prairie pothole region
Albert T. Klett, Harold F. Duebbert, C. A. Faanes, K.F. Higgins
1986, Resource Publication 158
Selected procedures are described for conducting nesting studies of upland nesting ducks in the prairie pothole region. Emphasis is on the use of standard procedures so that comparable results can be obtained. Major topics addressed are finding nests by flushing hens with drags pulled by vehicles, recording of appropriate data,...
Effect of glacier ablation on the Snettisham Hydroelectric Project, Long Lake and Crater Lake basins, Alaska, with a section on streamflow records
C. E. Sloan, P. A. Emery, Diana Fair, Robert D. Lamke
1986, Water-Resources Investigations Report 85-4315
Long Lake Basin in the Snettisham Project Area southeast of Juneau, Alaska, yields water used for the production of hydroelectric power. Development of adjacent Crater Lake is planned to increase the Project 's generating capacity. Estimates of the hydroelectric potential of the lakes are based on streamflow records which are...
Ground-water resource assessment of the Montauk area, Long Island, New York
K. R. Prince
1986, Water-Resources Investigations Report 85-4013
The water resources of the Montauk area were investigated from October 1980 through September 1983 to assess the availability of fresh groundwater. The principal aquifer, which consists of fine- to coarse-grained stratified glacial drift, is the sole source of freshwater. The freshwater/saltwater interface lies as much as 150 ft below...
Summary geochemical maps for samples of rock, stream sediment, and nonmagnetic heavy-mineral concentrates, Carson-Iceberg and Leavitt Lake Roadless Areas, Alpine, Mono, and Tuolumne counties, California
M.A. Chaffee
1986, Miscellaneous Field Studies Map 1416-C
The Carson-Iceberg and Leavitt Lake Roadless Areas (the study area) lie near the crest of the Sierra Nevada in central California. The study area encompasses approximately 219,630 acres in the Stanislaus and Toiyabe National Forests in Alpine, Mono, and Tuolumne Counties. The area is dominated by rugged topography typical of...
Geochemical maps showing distribution and abundance of copper in two fractions of stream-sediment concentrates, Silver City 1° x 2° quadrangle, New Mexico and Arizona
K. C. Watts, J.R. Hassemer, C.L. Forn, D. F. Siems
1986, Miscellaneous Field Studies Map 1183-B
No abstract available....
Geology of the surficial aquifer system, Dade County, Florida: Lithologic logs
C. R. Causaras
1986, Water-Resources Investigations Report 86-4126
The geologic framework of the surficial aquifer system in Dade County, Florida, was investigated as part of a longterm study by the USGS in cooperation with the South Florida Water Management District, to describe the geology, hydrologic characteristics, and groundwater quality of the surficial aquifer system. Thirty-three test wells were...
Ground-water movement in the upper glacial aquifer in the Manorville area, Town of Brookhaven, Long Island, New York, in November 1983
D. A. Eckhardt, E. J. Wexler
1986, Water-Resources Investigations Report 85-4035
Water levels in 52 wells near the Manorville scavenger-waste disposal facility in the Town of Brookhaven were measured in November 1983 to determine the direction and gradients of groundwater flow in the upper glacial aquifer. Groundwater moves south-southeastward (S22 degrees E) from the groundwater divide, about 6 miles north of...
Preliminary appraisal of ground water in and near the ancestral Missouri River Valley, northeastern Montana
G. W. Levings
1986, Water-Resources Investigations Report 86-4138
A preliminary appraisal was conducted in and near the ancestral Missouri River valley in northeastern Montana to describe the groundwater resources and to establish a data base for the area. The data base then could be used for future evaluation of possible changes in water levels or water quality. In...
Water resources of Clallam County, Washington: Phase I report
B. W. Drost
1986, Water-Resources Investigations Report 83-4227
An inventory of the water resources of Clallam County, Washington, showed that sufficient water is available to supply all present demands. Domestic water supplies can be obtained from wells drilled 100 ft or less into glacial and alluvial deposits; in areas underlain by bedrock, wells more than 100 ft deep...
Effects of urbanization on streamflow, sediment loads, and channel morphology in Pheasant Branch basin near Middleton, Wisconsin
W.R. Krug, G. L. Goddard
1986, Water-Resources Investigations Report 85-4068
A 5-year, data-collection and modeling study was conducted on Pheasant Branch basin in and near Middleton, Wisconsin. The objectives of the study were to: (1) describe the streamflow characteristics, sediment transport, and stream-channel morphology in the Pheasant Branch basin; and (2) relate the above factors to changes caused by urbanization...
Hydrogeology and ground-water quality of Lannon-Sussex area, northeastern Waukesha County, Wisconsin
R. D. Cotter
1986, Water-Resources Investigations Report 84-4213
The Silurian dolomite aquifer in the Lannon-Sussex area of southeastern Wisconsin is overlain by glacial deposits, but is within 8 ft of the land surface over 15% of the study area. The proximity of the dolomite aquifer to the land surface makes it susceptible to contamination from man 's activities....
Geohydrology of the Lloyd aquifer, Long Island, New York
M. S. Garber
1986, Water-Resources Investigations Report 85-4159
The Lloyd aquifer contains only about 9% of the water stored in Long Island 's groundwater system but is the only source of potable water for several communities near the north and south shores. The Lloyd aquifer is virtually untapped throughout most of central Long Island because current legal restrictions...
Effects of barge traffic on distribution and survival of ichthyoplankton and small fishes in the upper Mississippi River
L. E. Holland
1986, Transactions of the American Fisheries Society (115) 162-165
Short‐term impacts of commercial barge traffic on fish eggs, larvae, young‐of‐the‐year (age‐0) fishes, and small adults in the main channel of the upper Mississippi River were examined. Barge passages caused significant changes in the distribution of eggs and larvae in the study area. The mean catch of...
Long-term water-quality characteristics of Charlotte Harbor, Florida
T. H. Fraser
1986, Water-Resources Investigations Report 86-4180
Water-quality data for nine constituents collected from January 1976 through March 1984 in upper Charlotte Harbor were examined for evidence of trend (change) with time. Average seasonal patterns and moving averages were described to aid initial descriptions of variation. Multilinear regression models were developed using independent variables that are known...
Variability in base streamflow and water quality of streams and springs in Otter and Rosebud Creek basins, southeastern Montana
J. H. Lambing, R. F. Ferreira
1986, Water-Resources Investigations Report 85-4302
The results of three base-flow studies conducted on Otter and Rosebud Creeks during 1977, 1978, and 1983 are summarized and compared to assess the variability of base-flow magnitude and water quality during years of widely different precipitation. Chemical analyses for springs in these basins also are presented to provide and...
