Survival, growth, and catchability of rainbow trout of four strains
J.L. Brauhn, H. Kincaid
1982, North American Journal of Fisheries Management (2) 1-10
Fingerling rainbow trout (Salmo gairdneri) of genetically different strains survived, grew, and were caught at different rates by anglers and in gill nets after release from a hatchery into a 1‐hectare pond. When two domestic strains were compared, more fish of the strain genetically selected for fast growth were caught...
An automated mapping satellite system ( Mapsat).
A. P. Colvocoresses
1982, Photogrammetric Engineering and Remote Sensing (48) 1585-1591
The favorable environment of space permits a satellite to orbit the Earth with very high stability as long as no local perturbing forces are involved. Solid-state linear-array sensors have no moving parts and create no perturbing force on the satellite. Digital data from highly stabilized stereo linear arrays are amenable...
Origin and evolution of the Nakhla meteorite inferred from the Sm-Nd and U-Pb systematics and REE, Ba, Sr, Rb and K abundances
N. Nakamura, D.M. Unruh, M. Tatsumoto, R. Hutchison
1982, Geochimica et Cosmochimica Acta (46) 1555-1573
Analyses of Sm-Nd and U-Th-Pb systematics, REE, Ba, Sr, Rb and K concentrations were carried out for whole rock and mineral separates from the Nakhla meteorite. The 1.26 ±.07 b.y. Sm-Nd age obtained in this work is in good agreement with those previously obtained by the Rb-Sr and Ar-Ar methods. The...
Exotic terranes of western California
M.O. McWilliams, D. G. Howell
1982, Nature (297) 215-217
Numerous distinct geological terranes compose the North American Cordillera1; there may be as many as 50 terranes in California alone2. Critical to deciphering the history of Cordilleran tectonic assembly is an understanding of the displacement history of individual terranes. It is therefore important to know: (1) whether a terrane has...
Miocene volcanism and deformation in the western Cordillera and high plateaus of south-central Peru
E.H. McKee, D. C. Noble
1982, Geological Society of America Bulletin (93) 657-662
New radiometric ages on tuffs from south-central Peru support the postulated flare-up of volcanic activity during early Miocene time. In the region of Huancavelica, Julcani, and Lircay, lower Miocene rocks lie on folded strata of pre-Cenozoic age; the absence of units of Eocene...
A relation between landsat digital numbers, surface reflectance, and the cosine of the solar zenith angle
William S. Kowalik, Stuart E. Marsh, Ronald J. P. Lyon
1982, Remote Sensing of Environment (12) 39-55
A method for estimating the reflectance of ground sites from satellite radiance data is proposed and tested. The method uses the known ground reflectance from several sites and satellite data gathered over a wide range of solar zenith angles. The method was tested on each of 10 different Landsat images...
Immunogenic potential of growth products extracted from cultures of Aeromonas salmonicida for book trout (Salvelinus fontinalis)
R. C. Cipriano
1982, Canadian Journal of Fisheries and Aquatic Sciences (39) 1512-1518
The 57Fe Mössbauer parameters of pyrite and marcasite with different provenances
B.J. Evans, R. G. Johnson, F. E. Senftle, C. B. Cecil, F. Dulong
1982, Geochimica et Cosmochimica Acta (46) 761-775
Eighteen pyrite and twelve marcasite samples which have different provenances have been investigated to determine the systematics of the influence of mineralogical and geological factors on the 57Fe Mössbauer spectra at 298 K. The following results have been obtained: there is no ambiguity in distinguishing single phase pyrite from single...
Hydrologic inferences from ring widths of flood-damaged trees, Potomac River, Maryland
T.M. Yanosky
1982, Environmental Geology (4) 43-52
Year-to-year variability in the ring widths of trees on flood plains along two reaches of the Potomac River near Washington, D.C., seems in large part to be related to differences in flood-flow regimes. Trees directly exposed to high flood velocities are damaged more often than sheltered trees and thus exhibit...
Nuclear magnetic resonance studies of ancient buried wood-II. Observations on the origin of coal from lignite to bituminous coal
Patrick G. Hatcher, Irving A. Breger, Nikolaus Szeverenyi, G.E. Maciel
1982, Organic Geochemistry (4) 9-18
Coalified logs ranging in age from Late Pennsylvania to Miocene and in rank from lignite B to bituminous coal were analyzed by 13C nuclear magnetic resonance (NMR) utilizing the cross-polarization, magic-angle spinning technique, as well as by infrared spectroscopy. The results of this study indicate that at least three major...
The mobility of uranium and other elements during alteration of rhyolite ash to montmorillonite: A case study in the Troublesome Formation, Colorado, U.S.A.
R. A. Zielinski
1982, Chemical Geology (35) 185-204
An unusual occurrence of juxtaposed glassy and clay-altered ash was sampled to estimate the degree and type of element mobility during alteration of glass to montmorillonite. The results are particularly interesting in that major mobilization of uranium is indicated. Closely spaced samples of glassy and montmorillonitic ash were collected from...
Optimal dynamic management of groundwater pollutant sources
Steven M. Gorelick, Irwin Remson
1982, Water Resources Research (18) 71-76
The linear programing-superposition method is presented for managing multiple sources of groundwater pollution over time. The method uses any linear solute transport simulation model to generate a unit source-concentration response matrix that is incorporated into a management model. This series of constraints indicates local solute concentration histories that will result...
Diamond collecting in northern Colorado.
D. S. Collins
1982, Mineralogical Record (13) 205-208
The discovery of numerous diamond-bearing kimberlite diatremes in the N Front Range of Colorado and Wyoming is of both scientific and economic interest. Species recovered from heavy-mineral concentrates include Cr-diopside, spinel, Mg-ilmenite, pyrope and diamond. A nodule tentatively identified as a graphite-diamond eclogite was also found. -G.W.R....
Palladium, platinum, rhodium, iridium and ruthenium in chromite- rich rocks from the Samail ophiolite, Oman.
N.J. Page, J.S. Pallister, M.A. Brown, J.D. Smewing, J. Haffty
1982, Canadian Mineralogist (20) 537-548
30 samples of chromitite and chromite-rich rocks from two stratigraphic sections, 250 km apart, through the basal ultramafic member of the Samail ophiolite were spectrographically analysed for platinum-group elements (PGE) and for Co, Cu, Ni and V. These data are reported as are Cr/(Cr + Al), Mg/(Mg + Fe) and...
Stolzite from Tsumeb.
E.E. Foord, N. M. Conklin
1982, Mineralogical Record (13) 149-150
The world's largest known crystal of stolzite (1.3 X 1.3 X 2.5 cm) is described. It is associated with tennantite and quartz, and is from the Tsumeb mine, Tsumeb, Namibia. Forms present include (001), (111), (101), (122), and (212). Spectrographic analyses indicate a nearly end-member composition with Mo, Fe, Ba,...
Comparison of amino acid racemization geochronometry with lithostratigraphy, biostratigraphy, uranium-series coral dating, and magnetostratigraphy in the Atlantic Coastal Plain of the southeastern United States
L. McCartan, J. P. Owens, B. W. Blackwelder, Barney J. Szabo, D. F. Belknap, N. Kriausakul, R.M. Mitterer, J.F. Wehmiller
1982, Quaternary Research (18) 337-359
The results of an integrated study comprising litho- and biostratigraphic investigations, uranium-series coral dating, amino acid racemization in molluscs, and paleomagnetic measurements are compared to ascertain relative and absolute ages of Pleistocene deposits of the Atlantic Coastal Plain in North and South Carolina. Four depositional events are inferred for South...
13C Nuclear magnetic resonance studies of kerogen from Cretaceous black shales thermally altered by basaltic intrusions and laboratory simulations
L.W. Dennis, G.E. Maciel, Patrick G. Hatcher, Bernd R. T. Simoneit
1982, Geochimica et Cosmochimica Acta (46) 901-907
Cretaceous black shales from DSDP Leg 41, Site 368 in the Eastern Atlantic Ocean were thermally altered during the Miocene by an intrusive basalt. The sediments overlying and underlying the intrusive body were subjected to high temperatures (up to ~ 500°C) and, as a result, their kerogen was significantly altered....
A comparison of four streamflow record extension techniques
Robert M. Hirsch
1982, Water Resources Research (18) 1081-1088
One approach to developing time series of streamflow, which may be used for simulation and optimization studies of water resources development activities, is to extend an existing gage record in time by exploiting the interstation correlation between the station of interest and some nearby (long-term) base station. Four methods of...
A quantitative index of soil development from field descriptions: Examples from a chronosequence in central California
J.W. Harden
1982, Geoderma (28) 1-28
A soil development index has been developed in order to quantitatively measure the degree of soil profile development. This index, which combines eight soil field properties with soil thickness, is designed from field descriptions of the Merced River chronosequence in central California. These eight properties are: clay films, texture plus...
The memory of the accreting plate boundary and the continuity of fracture zones
Hans Schouten, Kim D. Klitgord
1982, Earth and Planetary Science Letters (59) 255-266
A detailed aeromagnetic anomaly map of the Mesozoic seafloor-spreading lineations southwest of Bermuda reveals the dominant magnetic grain of the oceanic crust and the character of the accreting boundary at the time of crustal formation. The magnetic anomaly pattern is that of a series of elongate lobes perpendicular to the...
An equation correlating the solubility of quartz in water from 25° to 900°C at pressures up to 10,000 bars
Robert O. Fournier, Robert W. Potter II
1982, Geochimica et Cosmochimica Acta (46) 1969-1973
The solubility of quartz in water from 25° to 900°C at specific volume of the solvent ranging from about 1 to 10 and from 300° to 600°C at specific volume of the solvent ranging from about 10 to 100 is given by an empirically derived equation of the form: log m = A + B(log V)...
Paleoecological studies at Lake Patzcuaro on the west-central Mexican Plateau and at Chalco in the basin of Mexico
W.A. Watts, J.P. Bradbury
1982, Quaternary Research (17) 56-70
A 1520-cm sediment core from Lake Patzcuaro, Michoacan, Mexico, is 44,000 yr old at the base. All parts of the core have abundant pollen of Pinus (pine), Alnus (alder), and Quercus (oak) with frequent Abies (fir). The interval dated from 44,000 to 11,000 yr ago has a homogeneous flora characterized...
Chemical and isotopic diversity in basalts dredged from the East Pacific Rise at 10°S, the fossil Galapagos Rise and the Nazca plate
Rodey Batiza, Richard Oestrike, Kiyoto Futa
1982, Marine Geology (49) 115-132
We present petrographic, chemical and isotopic data for fresh lava samples dredged from three regions: (1) the fossil Galapagos Rise; (2) an elongate volcano near this extinct spreading center; and (3) the East Pacific Rise at 10°S. The samples from the Galapagos Rise are among the first samples from...
Benthic phosphorus regeneration in the Potomac River Estuary
E. Callender
1982, Hydrobiologia (91-92) 431-446
The flux of dissolved reactive phosphate from Potomac riverine and estuarine sediments is controlled by processes occurring at the water-sediment interface and within surficial sediment. In situ benthic fluxes (0.1 to 2.0 mmoles m-2 day-1) are generally five to ten times higher than calculated diffusive fluxes (0.020 to 0.30 mmoles...
The solubility of quartz in aqueous sodium chloride solution at 350°C and 180 to 500 bars
Robert O. Fournier, Robert J. Rosenbauer, James L. Bischoff
1982, Geochimica et Cosmochimica Acta (46) 1975-1978
The solubility of quartz in 2, 3, and 4 molal NaCl was measured at 350°C and pressures ranging from 180 to 500 bars. The molal solubility in each of the salt solutions is greater than that in pure water throughout the measured pressure range, with the ratio of solubility in...
