Compositional and mineralogic constraints on the genesis of ophiolite hosted nickel mineralization in the Pevkos area, Limassol Forest, Cyprus
M. P. Foose, M. Economou, A. Panayiotou
1985, Mineralium Deposita (20) 234-240
Mineralization composed dominantly of primary troilite, maucherite, pentlandite, and chalcopyrite, and secondary valleriite occurs in serpentinized transition zone rocks of the Limasol Forest segment of the Troodos ophiolite complex, Cyprus. Whole-rock and electron microprobe analyses of this mineralization gives ranges of Cu/(Cu+Ni)=0.16 to 0.47, Pt/(Pt+Pd)=0.66 to 0.51, Ni/Co=6.33 to 13.4,...
Experimental chemical weathering of various bedrock types at different pH-values. 1. Sandstone and granite
A.A. Afifi, O.P. Bricker, J.C. Chemerys
1985, Chemical Geology (49) 87-113
Experimental chemical weathering of the so-called Old Rag Granite and Massanutten Sandstone, Virginia, U.S.A., has produced a comparison with the natural environment, and prediction of the effect of acid precipitation. The experimental results of the release of elements, dissolution of minerals, total rock weathered and the degree of weathering...
Engineering-geology site appraisal of the Federal Capital Territory, Nigeria
J. R. Ege, W. R. Griffitts, W.C. Overstreet
1985, Bulletin of the International Association of Engineering Geology (31) 71-79
The 7,700-km2-area Federal Capital Territory, Nigeria, is underlain by crystalline igneous and metamorphic rocks of Precambrian age. Sandstone and claystone of Cretaceous age overlie Precambrian rocks in the southwestern part of the Territory. Laterite caps many hills of Cretaceous rock, some hills of Precambrian rock, and crops out near stream...
Increased benthic grazing: An alternative explanation for low phytoplankton biomass in northern San Francisco Bay during the 1976-1977 drought
F.H. Nichols
1985, Estuarine, Coastal and Shelf Science (21) 379-388
Among the consequences of extremely low river flow into northern San Francisco Bay during a two-year drought were (1) a gradual increase in salinity, (2) an unusual decline in chlorophyll a concentration, and (3) the upstream migration of estuarine benthic invertebrates to the normally brackish area of the bay. Total abundance in...
Trace element content of gossans at four mines in the West Shasta massive sulfide district
R. F. Sanzolone, J. A. Domenico
1985, Economic Geology (80) 2206-2212
We evaluated the trace element content of gossans at four mines in the West Shasta Cu-Zn mining district in California. We found little difference in trace element content between the chipped rock rind and whole-rock gossan samples. Gossans derived from disseminated sulfides were found to have a lower trace element...
Determination of elastic wave velocity and relative hypocenter locations using refracted waves. I. Methodology
Kaye M. Shedlock, Lucile M. Jones, Xiufang Ma
1985, Bulletin of the Seismological Society of America (75) 427-439
An arrival time difference method utilizing refracted arrivals from earthquakes in a homogeneous, layered earth model has been developed for the simultaneous determination of near-source (in situ) velocity and relative locations of earthquakes. The method is particularly applicable when analyzing data from arrays in which most of the recording stations...
Topographic mapping of the Moon
S.S.C. Wu
1985, Earth, Moon and Planets (32) 165-172
Contour maps of the Moon have been compiled by photogrammetric methods that use stereoscopic combinations of all available metric photographs from the Apollo 15, 16, and 17 missions. The maps utilize the same format as the existing NASA shaded-relief Lunar Planning Charts (LOC-1, -2, -3, and -4), which have a...
Simulation of ground-water flow in southeastern Oahu, Hawaii
P. R. Eyre
1985, Groundwater (23) 325-330
On the leeward side of southeastern Oahu, Hawaii, near-vertical dikes have intruded the gently dipping and highly permeable lava flows of the Koolau mountain. These dikes bound the study area on the north and west and internally divide it into the Waialae and Wailupe-Hawaii Kai...
Selected characteristics of limestone and dolomite reservoirs in the United States
James W. Schmoker, Katherine B. Krystinik, Robert B. Halley
1985, American Association of Petroleum Geologists Bulletin (69) 733-741
Data from the United States Oil and Gas File (TOTL) developed by the University of Oklahoma, Norman, Oklahoma, are used to characterize the lithology, location (state and basin), geologic age, year of discovery, depth to top of pay, porosity, permeability, water saturation, volume of crude oil and nonassociated gas originally...
Relationship between reported commercial landings and abundance of young striped bass in Chesapeake Bay, Maryland
C.P. Goodyear
1985, Transactions of the American Fisheries Society (114) 92-96
The ability to predict subsequent landings of striped bass Morone saxatilis from the indices of abundance of juveniles (young of the year) determined annually by the Maryland Department of Natural Resources was evaluated by multiple‐regression techniques. About 57% of the variation in reported landings could be accounted for by the...
Abundance fluctuations among benthic invertebrates in two pacific estuaries
Frederic H. Nichols
1985, Estuaries (8) 136-144
Long-term studies were used to examine (1) contrasting time scales and mechanisms of structural variations within two benthic communities and (2) the usefulness of long data sets for evaluating human impact. A 10-year study of a San Francisco Bay mudflat, the details of which are reported elsewhere, has revealed large...
Compilation of hydrologic data for the Edwards Aquifer, San Antonio area, Texas, 1982, with 1934-82 summary
R.D. Reeves, G. B. Ozuna
1985, Edwards Underground Water District Bulletin 42
No abstract available....
Toxic materials, fishing, and environmental variation: Simulated effects on striped bass population trends
C.P. Goodyear
1985, Transactions of the American Fisheries Society (114) 107-113
Decreased survival of larval striped bass Morone saxatilis resulting from toxic chemicals in the environment and decreased survival of adults caused by fishing both are suspected as agents contributing to the decline in the Chesapeake Bay stock since the mid‐1970s. The relative power of each type of mortality to cause...
Persistence of an introduced mud flat community in south San Francisco Bay, California
Frederic H. Nichols, Janet K. Thompson
1985, Marine Ecology Progress Series (24) 83-97
The benthic invertebrate community inhabiting the extensive and sedimentologically homogeneous mudflats of South San Francisco Bay has demonstrated a high degree of constancy in both species composition and relative abundance among species throughout 10 yr of observation. The community, composed predominantly of introduced species with opportunistic lifestyles, is dominated numerically...
A procedure for estimating Bacillus cereus spores in soil and stream-sediment samples — A potential exploration technique
J.R. Watterson
1985, Journal of Geochemical Exploration (23) 243-252
The presence of bacterial spores of the Bacillus cereus group in soils and stream sediments appears to be a sensitive indicator of several types of concealed mineral deposits, including vein-type gold deposits. The B. cereus assay is rapid, inexpensive, and inherently reproducible. The test, currently under investigation for its potential in mineral...
PREPRO: a computer program for encoding regional exploration data for use in characteristic analysis
N.J. Bridges, J.T. Hanley, R.B. McCammon
1985, Computers & Geosciences (11) 513-519
The preprocessor (PREPRO) computer program offers the exploration geologist a variety of options for encoding regional exploration data into ternary form for use in characteristic analysis. PREPRO's options include variable-input formats, cursor input, ordering among a set of input variables, and selectable ternary transformations. Moreover, the program provides for the...
Survey of striped bass hatchery management in the southeastern United States
J. G. Geiger, N. C. Parker
1985, Progressive Fish-Culturist (47) 1-13
No abstract available....
Effects of cumulative loading level, as fish weight per unit flow, on water quality and growth of lake trout
J. W. Meade, J.S. Ramsey, J.C. Williams
1985, Journal of the World Mariculture Society (16) 40-51
Lake trout, Salvelinus namaycush, were cultured in a series of five rearing units (in triplicate). The fish removed available oxygen in each unit, from about 10.5 to 7.0 mg/L. Oxygen was replaced, through aeration, between rearing units. Effects of cumulative loading, as fish weight/flow rate, are described in terms of water...
Glugea pimephales Fantham, Porter, and Richardson, 1941, n comb (Microporidia: Glugeidae) in the fathead minnow, Pimephales promelas
C. Morrison, G. L. Hoffman, V. Sprague
1985, Canadian Journal of Zoology (63) 380-391
A microsporidan parasite, fitting the description of Nosema pimephales Fantham, Porter and Richardson, 1941, was found in fry of the fathead minnow, Pimephales promelas Rafinesque, from the Wray Fish Hatchery near Fort Morgan, Colorado. More detailed studies proved it to be a typical species of Glugea Thélohan, 1891, to which genus it was transferred. Presence of...
Movement of underyearling walleyes in response to odor and visual cues
D. V. Rottiers, C. A. Lemm
1985, Progressive Fish-Culturist (47) 34-41
Underyearling walleyes, allowed to move freely in a Y‐shaped chamber into which various substances were added to one arm or another, were attracted to sodium chloride, sucrose, glutathione, vitamin B12, betaine, arginine, Daphnia slurries, some fish slurries, washings from live Daphnia and Artemia, and some commercial fish foods. They avoided...
Comparative sensitivities of diagnostic procedures used to detect bacterial kidney disease in salmonid fishes
R. C. Cipriano, C. E. Starliper, J. H. Schachte
1985, Journal of Wildlife Diseases (21) 144-148
Kidney and spleen homogenates from each of 60 coho salmon (Oncorhynchus kisutch) and steelhead trout (Salmo gairdneri) were examined for detection of Renibacterium salmoninarum. The proportions of positives differed widely with the detection procedures used: in coho salmon, 5% were positive by the Gram-stain...
Interpretation with a Donnan-based concept of the influence of simple salt concentration on the apparent binding of divalent ions to the polyelectrolytes polystyrenesulfonate and dextran sulfate
J.A. Marinsky, Robert F. Baldwin, M.M. Reddy
1985, Journal of Physical Chemistry (89) 5303-5307
It has been shown that the apparent enhancement of divalent metal ion binding to polyions such as polystyrenesulfonate (PSS) and dextran sulfate (DS) by decreasing the ionic strength of these mixed counterion systems (M2+, M+, X-, polyion) can be anticipated with the Donnan-based model developed by one of us (J.A.M.)....
Correlation of ash-flow tuffs
W. Hildreth, G. Mahood
1985, Geological Society of America Bulletin (96) 968-974
Discrimination and correlation of ash-flow sheets is important in structurally complex, long-lived volcanic fields where such sheets provide the best keys to the regional stratigraphic framework. Three-dimensional complexities resulting from pulsatory eruptions, sectorial emplacement, mechanical sorting during outflow, thermal and compositional zoning of...
Thickness of ice on perennially frozen lakes
C.P. McKay, G.D. Clow, R.A. Wharton Jr., S. W. Squyres
1985, Nature (313) 561-562
The dry valleys of southern Victoria Land, constituting the largest ice-free expanse in the Antarctic, contain numerous lakes whose perennial ice cover is the cause of some unique physical and biological properties 1-3. Although the depth, temperature and salinity of the liquid water varies considerably from lake to lake, the...
Downstream dilution of a lahar: Transition from debris flow to hyperconcentrated streamflow
Thomas C. Pierson, Kevin M. Scott
1985, Water Resources Research (21) 1511-1524
Nearly instantaneous melting of snow and ice by the March 19, 1982, eruption of Mount St. Helens released a 4 × 106 m3 flood of water from the crater that was converted to a lahar (volcanic debris flow) through erosion and incorporation of sediment by the time it reached the base of...
