Geochemical evidence of drawdown in the Cerro Prieto geothermal field
A.H. Truesdell, M.A. Manon, S.M.E. Jimenez, A.A. Sanchez, L.J.J. Fausto
1979, Geothermics (8) 257-265
Some wells of the Cerro Prieto geothermal field have undergone changes in the chemistry of fluids produced which reflect reservoir processes. Pressure decreases due to production in the southeastern part of the field have produced both drawdown of lower chloride fluids from an overlying aquifer and boiling in the aquifer...
Modern marine sediments as a natural analog to the chemically stressed environment of a landfill
M.J. Baedecker, W. Back
1979, Journal of Hydrology (43) 393-414
Chemical reactions that occur in landfills are analogous to those reactions that occur in marine sediments. Lateral zonation of C, N, S, O, H, Fe and Mn species in landfills is similar to the vertical zonation of these species in marine sediments and results from the following reaction sequence: (1)...
A large submarine sand-rubble flow on kilauea volcano, hawaii
D.J. Fornari, J.G. Moore, L. Calk
1979, Journal of Volcanology and Geothermal Research (5) 239-256
Papa'u seamount on the south submarine slope of Kilauea volcano is a large landslide about 19 km long, 6 km wide, and up to 1 km thick with a volume of about 39 km3. Dredge hauls, remote camera photographs, and submersible observations indicate that it is composed primarily of unconsolidated...
Measured crustal deformation in Imperial Valley, California
B. E. Lofgren
1979, Geothermics (8) 267-272
Precise geodetic surveys since 1972 indicate that significant vertical deformation of the land surface continues in Imperial Valley, California. Measured vertical changes as great as 3-5 cm per year indicate that two types of tectonic movement are occurring: (1) a downward regional tilt of the valley surface from the Mexican...
Atomic-absorption spectrometric determination of cobalt, nickel, and copper in geological materials with matrix masking and chelation-extraction
R. F. Sanzolone, T. T. Chao, G. L. Crenshaw
1979, Analytica Chimica Acta (105) 247-253
An atomic-absorption spectrometric method is reported for the determination of cobalt, nickel, and copper in a variety of geological materials including iron- and manganese-rich, and calcareous samples. The sample is decomposed with HP-HNO3 and the residue is dissolved in hydrochloric acid. Ammonium fluoride is added to mask iron and 'aluminum. After...
The Parkfield prediction experiment
A. Lindh, P. Evans, P. Harsh, G. Buhr
1979, Earthquake Information Bulletin (USGS) (11) 209-213
The San Andreas fault is part of the boundary between the Pacific and North American crustal plates. In California, movements of about 3 centimeters per year are currently taking place along the fault, although plat tectonic models suggest a faster rate of 5 cm/yr may be the average over a...
The role of stress in fish disease
F. P. Meyer
J.A. Plumb, editor(s)
1979, Book chapter, Principal diseases of farm-raised catfish
Abstract not submitted to date...
Biotransformation of selected chemicals by fish
J. L. Allen, V. K. Dawson, J. B. Hunn
M. A. Q. Khan, J.J. Lech, J.J. Menn, editor(s)
1979, Book chapter, Pesticide and xenobiotic metabolism in aquatic organisms
Abstract not submitted to date...
Fish diseases
F. P. Meyer
O.H. Siegmund, editor(s)
1979, Book chapter, The Merck Veterinary Manual
Abstract not submitted to date...
Microearthquake networks and earthquake prediction
W.H.K. Lee, S. W. Steward
1979, Earthquake Information Bulletin (USGS) (11) 192-195
A microearthquake network is a group of highly sensitive seismographic stations designed primarily to record local earthquakes of magnitudes less than 3. Depending on the application, a microearthquake network will consist of several stations or as many as a few hundred . They are usually classified as either permanent or...
Manganese nodule resources in the northeastern equatorial Pacific
V.E. McKelvey, Nancy A. Wright, Robert W. Rowland
1979, Book chapter, Marine Geology and Oceanography of the Pacific Manganese Nodule Province
Recent publication of maps at scale 1:1,000,000 of the northeastern equatorial Pacific region showing publicly available information on the nickel plus copper content of manganese nodules has made it possible to outline the prime area between the Clarion and Clipperton fracture zones which has been the focus of several recent...
Space, time, and the third dimension (model error)
Marshall E. Moss
1979, Water Resources Research (15) 1797-1800
The space-time tradeoff of hydrologic data collection (the ability to substitute spatial coverage for temporal extension of records or vice versa) is controlled jointly by the statistical properties of the phenomena that are being measured and by the model that is used to meld the information sources. The control exerted...
Fish viruses: A double-stranded RNA icosahedral virus from a North American cyprinid
J.A. Plumb, P.R. Bowser, J.M. Grizzle, A.J. Mitchell
1979, Journal of the Fisheries Research Board of Canada (36) 1390-1394
A previously unreported virus disease of cultured golden shiners (Notemigonus crysoleucas) is described. The condition is called golden shiner virus (GSV) disease. The virus is icosahedral, measures approximately 70 nm, is ether and heat resistant, stable at pH 3, 7, and 10, and appears to have a double stranded RNA core....
An evaluation of the zircon method of isotopic dating in the Southern Arabian Craton
J.A. Cooper, J. S. Stacey, D.G. Stoeser, R.J. Fleck
1979, Contributions to Mineralogy and Petrology (68) 429-439
A zircon study has been made on eleven samples of igneous rocks from the Saudi Arabian Craton. Ages of sized and magnetic fractions of zircon concentrates show variable degrees of discordance which seem to result from a very young disturbance that produces linear arrays in the Concordia plot. Model age...
Venus: Preliminary topographic and surface imaging results from the Pioneer Orbiter
G.H. Pettengill, P.G. Ford, W.E. Brown, W.M. Kaula, H. Masursky, E. Eliason, G.E. McGill
1979, Science (205) 90-93
Three large Venus surface features, identified previously in images obtained from Earth-based radar observations, are shown by the Pioneer Venus radar mapper to be elevated 5 to 10 kilometers above the surrounding terrain. Two of these features, one bright and the other dark, lie adjacent to each...
Quantitative variation and the ecological role of vulpinic acid and atranorin in thallus of Letharia vulpina
Nathan L. Stephenson, Philip W. Rundel
1979, Biochemical Systematics and Ecology (7) 263-267
High pressure liquid chromatography was used to determine concentrations of vulpinic acid and atranorin in the thaullus of Letharia vulpina. Vulpinic acid concentration is lowest in the old basal branches of the thallus and increases toward the young branch tips, whereas the reverse is true for atranorin. The suggested role of...
Low-velocity impact craters in ice and ice-saturated sand with implications for Martian crater count ages
S.K. Croft, S. W. Kieffer, T.J. Ahrens
1979, Journal of Geophysical Research Solid Earth (84) 8023-8032
We produced a series of decimeter-sized impact craters in blocks of ice near 0°C and −70°C and in ice-saturated sand near −70°C as a preliminary investigation of cratering in materials analogous to those found on Mars and the outer solar system satellites. The projectiles used were standard 0.22 and 0.30...
Petrology, composition, and age of intrusive rocks associated with the Quartz Hill molybdenite deposit, southeastern Alaska
T. Hudson, James G. Smith, Raymond L. Elliott
1979, Canadian Journal of Earth Sciences (16) 1805-1822
A large porphyry molybdenum deposit (Quartz Hill deposit) was recently discovered in the heart of the Coast Range batholithic complex about 70 km east of Ketchikan, southeastern Alaska. Intrusive rocks associated with the mineral deposit form two composite epizonal to hypabyssal stocks and many dikes in country rocks. The stocks are...
Some basic considerations in the design of hydrologic data networks
Marshall E. Moss
1979, Water Resources Research (15) 1673-1676
Two preeminent considerations of data network design are the random nature of the hydrologic phenomena and the uses that will be made of the data. Information distilled from the data is usually measured in a parametric statistical sense, although the data user is more concerned with the integrated measure of...
Population differentiation along a flood frequency gradient: Physiological adaptations to flooding in Nyssa sylvatica
Jon E. Keeley
1979, Ecological Monographs (49) 89-108
Throughout the southeastern United States the hardwood Nyssa sylvatica (sensu lato) is distributed along a soil moisture gradient from upland sites, which are never flooded, to floodplains, which are periodically flooded and drained to permanently flooded swamps. Population differentiation with respect to flood tolerance and related physiological attributes was investigated...
U.S. Geological Survey core drilling on the Atlantic shelf
J.C. Hathaway, C. W. Poag, P. C. Valentine, R.E. Miller, D.M. Schultz, F.T. Manheim, F. A. Kohout, Michael H. Bothner, D.A. Sangrey
1979, Science (206) 515-527
The first broad program of scientific shallow drilling on the U.S. Atlantic continental shelf has delineated rocks of Pleistocene to Late Cretaceous age, including phosphoritic Miocene strata, widespread Eocene carbonate deposits that serve as reflective seismic markers, and several regional unconformities. Two sites, off Maryland and New Jersey, showed light...
Dispersal and migratory patterns of San Francisco Bay produced herons, egrets, and terns
Robert E. Gill Jr., L. Richard Mewaldt
1979, North American Bird Bander (4) 4-13
San Francisco Bay, California, including its fringing marshes, supports a large and diverse water related avifauna (Grinnell and Wythe 19271 Sibley 1952, Gill 1973, 1977). Certain of man's alterations of the Bay's shallower wetlands have resulted in increased habitat diversity which has allowed colonization by several species of birds including...
The geochemistry of the Fox Hills-Basal Hell Creek Aquifer in southwestern North Dakota and northwestern South Dakota
Donald C. Thorstenson, Donald W. Fisher, Mack G. Croft
1979, Water Resources Research (15) 1479-1498
The Late Cretaceous Fox Hills Formation and the basal portion of the overlying Hell Creek Formation constitute an important aquifer in the Fort Union coal region. Throughout most of southwestern North Dakota and northwestern South Dakota the aquifer is at depths ranging from 1000 to 2000 ft, except for exposures...
Recent developments in uranium exploration using the U.S. Geological Survey's mobile helium detector
G.M. Reimer, E.H. Denton, I. Friedman, J. K. Otton
1979, Journal of Geochemical Exploration (11) 1-12
A mobile mass spectrometer to measure He concentrations has been developed by the U.S. Geological Survey. This instrument has been tested in areas of known uranium deposits, and He anomalies have been found in both soil gas and water. A gas sample is collected in a hypodermic syringe, injected into...
Notes on sedimentation activities calendar year 1977
U.S. Interagency Advisory Committee on Water Data- Subcommittee on Sedimentation
1979, Report
The need for disseminating current information on activities in the field of sedimentation was proposed by the Chairman of the Federal Interagency River Basin Committee's Subcommittee on Sedimentation shortly after the subcommittee was formed in May 1946. At the fifth meeting of the subcommittee on September 17, 1946, the members...
