Micronutrients and kelp cultures: Evidence for cobalt and manganese deficiency in Southern California deep seawater
J.S. Kuwabara
1982, Science (216) 1219-1221
It has been suggested that naturally occurring copper and zinc concentrations in deep seawater are toxic to marine organisms when the free ion forms are overabundant. The effects of micronutrients on the growth of gametophytes of the ecologically and commercially significant giant kelp (Macrocystis pyrifera) were studied...
Hydrogeochemical prospecting for porphyry copper deposits in the tropical-marine climate of Puerto Rico
W. R. Miller, W. H. Ficklin, R. E. Learned
1982, Journal of Geochemical Exploration (16) 217-233
A hydrogeochemical survey utilizing waters from streams and springs was conducted in the area of two known porphyry copper deposits in the tropical-marine climate of westcentral Puerto Rico. The most important pathfinder for regional hydrogeochemical surveys is sulfate which reflects the associated pyrite mineralization. Because of increased mobility due to...
Uraniferous opal, Virgin Valley, Nevada: Conditions of formation and implications for uranium exploration
R. A. Zielinski
1982, Journal of Geochemical Exploration (16) 197-216
Uraniferous, fluorescent opal, which occurs in tuffaceous sedimentary rocks at Virgin Valley, Nevada, records the temperature and composition of uranium-rich solutions as well as the time of uranium-silica coprecipitation. Results are integrated with previous geologic and geochronologic data for the area to produce a model for uranium mobility that may...
Submarine valleys in the northeastern Gulf of Alaska: Characteristics and probable origin
Paul R. Carlson, Terry R. Bruns, Bruce F. Molnia, W.C. Schwab
1982, Marine Geology (47) 217-242
The continental shelf of the northeastern Gulf of Alaska Between Prince William Sound and Cross Sound is cut by at least eight major valleys. From west to east, these are Hinchinbrook Seavalley, Egg Island Trough, Kayak Trough, Bering Trough, Pamplona Troughs, Yakutat Valley, Alsek Valley and Yakobi Valley. Evidence common...
Mechanisms for trace metal enrichment at the surface microlayer in an estuarine salt marsh
Leonard W. Lion
1982, Marine Chemistry (11) 235-244
The relative contributions of adsorption to particulate surfaces, complexation with surface-active organic ligands and uptake by micro-organisms were evaluated with respect to their importance in the surface microlayer enrichment (‘partitioning’) of Cd, Pb and Cu. The contributions of each process were inferred from field data in which partitioning of the...
Reconnaissance Geology of the Jabal as Sukkah Quadrangle, Sheet 21/43 B, Kingdom of Saudi Arabia
Maurice R. Brock
1982, Report
The Jabal as Sukkah quadrangle (21/43 B) lies in the southern Najd region within the Arabian Shield between lat 21°30' and 22°00' N. and long 43°30' and 44°00' E. The oldest rocks exposed are a very thick sequence of volcanic flow rocks of mostly felsic to intermediate composition interbedded with...
Quantifying instream values for water allocation
Robert T. Milhous
1982, Book, Proceedings of the conference on water and energy technical and policy issues
No abstract available....
Meta sulfide deposits on the Juan de Fuca Ridge
Randolph A. Koski, William Normark, J. L. Morton
1982, Oceanus (25) 42-48
No abstract available. ...
Origin and geochemistry of redox cycles of Jurassic to Eocene age, Cape Verde Basin (DSDP Site 367), continental margin of North West Africa
Walter E. Dean, J.V. Gardener
1982, Book chapter, Nature and origin of Cretaceous carbon-rich facies
No abstract available....
Continuous subaqueous deposition of the Permian Castile evaporites, Delaware Basin, Texas and New Mexico
Walter E. Dean, Roger Anderson
1982, Conference Paper, Depositional and diagenetic spectra of evaporites
Structures that are common in the Castile Formation (Ochoan) of the Delaware Basin, Texas and New Mexico (Fig. 1) include fine planar laminations, breccias, microfolded laminae, and nodular anhydrite. These structures, particularly the laminae, have been used to demonstrate the subaqueous depositional history of the Castile (Anderson and Kirkland, 1966;...
Oxygen-deficient depositional paleoenvironments in the mid- Cretaceous tropical and subtropical central Pacific Ocean
Jorn Thiede, Walter E. Dean, George E. Claypool
1982, Book chapter, Nature and origin of Cretaceous carbon-rich facies
No abstract available....
Application of wave field continuation to the inversion of refraction data
G. A. McMechan, Robert W. Clayton, Walter D. Mooney
1982, Journal of Geophysical Research B: Solid Earth (87) 927-935
Three examples of the inversion of refraction data by downward continuation illustrate the applicability of the method to field data. The first example is a refraction profile from the Mojave Desert, California. These data are spatially aliased and contain clear evidence of lateral inhomogeneity. The inversion in...
Precambrian age of the Boston Basin: New evidence from microfossils
C. Lenk, P.K. Strother, C. A. Kaye, E.S. Barghoorn
1982, Science (216) 619-620
A Vendian (Late Proterozoic Z) age has been determined for the Boston Basin by comparison of a microflora from the Cambridge Argillite with other late Precambrian assemblages. The microfossils, which include Bavlinella cf. faveolata, are preserved as petrifactions in pyrite. This age designation for the sedimentary rocks of the Boston...
The requirement of lake trout (Salvelinus namaycush) for dietary branched-chain amino acids
Steven Gerard Hughes
1982, Thesis
No abstract available at this time...
Uranium-lead isochron age and preliminary sulfur isotope systematics of the Felder uranium deposit, south Texas
K.R. Ludwig, Martin B. Goldhaber, Richard L. Reynolds, Kathleen R. Simmons
1982, Economic Geology (77) 557-563
Uranium-lead isotope systematics of roll-front ores in Miocene sandstone at the Felder and McLean uranium deposits (south Texas coastal plain) give a well-defined 207 Pb/ 204 Pb- 235 U/ 204 Pb isochron age of 5.07 + or - 0.15 m.y. The relatively slight degree of scatter of the points defining the isochron is probably due to initial Pb...
Biogenic and nonbiogenic ore-forming processes in the south Texas uranium district; evidence from the Panna Maria deposit
Richard L. Reynolds, Martin B. Goldhaber, D. Carpenter
1982, Economic Geology (77) 541-556
Geochemical and petrographic studies of core samples from the Panna Maria uranium deposit, a roll-type orebody in the Eocene Jackson Group in Karnes County, Texas, yield important information on the origin of the deposit. Organic carbon content averages about 0.42 weight percent in reduced rock and correlates postively with sulfur...
Acute and chronic toxicity studies with monochlorobenzene in rainbow trout
George M. Dalich, R. E. Larson, William H. Gingerich
1982, Aquatic Toxicology (2) 127-142
The toxicity of monochlorobenzene (CB) was investigated in rainbow trout following acute intraperitoneal (i.p.) administration and chronic exposure via the water in a continuously flowing system for 15 or 30 days.In the acute study overt toxicity and hepatotoxicity were monitored over a 96-h time period. Variables measured to assess toxicity...
Sampling nearshore estuarine fishes with rotenone
G.C. Matlock, J.E. Weaver, A.W. Green
1982, Transactions of the American Fisheries Society (111) 326-331
Sampling with rotenone is an effective method for providing abundance estimates of estuarine fishes at nearshore locations. However, the determination of recovery rates for individual species is critical for estimating abundance by this technique. Recovery rates in this study varied greatly among species, but did not vary among station types...
Temperature dependence of unsaturated hydraulic conductivity of two soils
Jim Constantz
1982, Soil Science Society of America Journal (46) 466-470
Packed columns of Oakley sand (mixed, mesic Typic Paleudalfs) and Hanford sandy loam (mixed, nonacid, thermic Typic Xerorthents) were used to develop isothermal steady-state fluxes. Soil matric potentials were measured and unsaturated hydraulic conductivities were calculated over a range of matric potentials at 2°, 25°, and 45° ± 0.5°C. In...
Repellency and toxicity of three bird control chemicals to four species of African grain-eating birds
R. L. Bruggers, E. W. Schafer Jr.
1982, Journal of Wildlife Management (46) 453-457
No abstract available....
Lakes and lake-like waters of the Hawaiian Archipelago
J. A. Maciolek
1982, Occasional Papers Bernice P. Bishop Museum (25) 1-14
This summary of Hawaiian lacustrine limnology is based on 12 years of field and literature surveys of archipelagic inland waters. Lakes here are distinguished from other standing waters by limits on surface oceanic area (> 0.1 ha) and depth (> 2 m), and by the absence of flatural surface oceanic connection....
Geomagnetic Workshop
John M. DeNoyer, J.C. Cain, S. Banerjee, E.R. Benton, Richard J. Blakely, Robert S. Coe, C.G.A. Harrison, Malcolm J. S. Johnston, R.D. Regan
1982, Eos, Transactions, American Geophysical Union (63) 645-648
A workshop on geomagnetism, sponsored by the Geologic Division of the U.S. Geological Survey, was held in the Denver West Office Complex in Golden, Colorado, April 13–15, 1982. There were 90 registered participants from government agencies, academic institutions, and industry.This effort stemmed from the realization that geomagnetism, once a small...
United States gold resource profile; discussion
D. R. Shawe, Roger P. Ashley, T. A. Steven, R. B. Taylor, Edwin W. Tooker
1982, Economic Geology (77) 1242-1244
No abstract available....
Preliminary evaluation of a habitat suitability model for pronghorn
Arthur W. Allen, M.J. Armbruster
1982, Book, Proceedings 10th biennial pronghorn antelope workshop
A fluid density gage for measuring suspended-sediment concentration, Part A. Gage response to steady-state and transient conditions
J. V. Skinner
1982, Report X
No abstract available....
