Root zone of the late Proterozoic Salma caldera, northeastern Arabian Shield, Kingdom of Saudi Arabia
K.S. Kellogg
1985, Journal of Geophysical Research Solid Earth (90) 11253-11262
The eroded root of the late Proterozoic Salma caldera crops out in a striking, roughly elliptical feature, about 27 km long and 22 km wide, near the northeastern edge of the Arabian Shield. The caldera is genetically part of an elongate alkalic granitic massif (Jabal Salma) that extends 35 km...
Uranium-series dating of fossil corals from marine sediments of southeastern United States Atlantic Coastal Plain
Barney J. Szabo
1985, Geological Society of America Bulletin (96) 398-406
Extensive low-lying marine deposits border the southeastern United States Atlantic Coastal Plain. Some units are fossiliferous and contain corals as isolated fragments in sediments of a detrital character. These corals are subject to alteration processes such that suites of related samples must be...
Solubility relations in the system sodium chloride-ferrous chloride-water between 25 and 70.degree.C at 1 atm
I.-M. Chou, L.D. Phan
1985, Journal of Chemical and Engineering Data (30) 216-218
Solubility relations in the ternary system NaCl-FeCl2-H2O have been determined by the visual polythermal method at 1 atm from 20 to 85??C along six composition lines. These she composition lines are defined by mixing FeCl2??4H2O with six aqueous NaCl solutions containing 5, 10, 11, 15, 20, and 25 wt %...
Redescription of Bellerophon asiaticus Wirth (Early Triassic: Gastropoda) from China, and a survey of Triassic Bellerophontacea
E.Y. Yochelson, Hongfu Yin
1985, Journal of Paleontology (59) 1305-1319
The bilaterally symmetrical gastropod Bellerophon asiaticus Wirth is redescribed from specimens collected in Guizhou Province, PRC. The species is reassigned to Retispira, a common late Paleozoic taxon. Retispira is another example of a Paleozoic gastropod genus that crossed the era boundary. Associated pelecypods that date these Guizhou occurrences as Early...
Dissolution of barite for the analysis of strontium isotopes and other chemical and isotopic variations using aqueous sodium carbonate
G. N. Breit, E.C. Simmons, M. B. Goldhaber
1985, Chemical Geology: Isotope Geoscience Section (52) 333-336
A simple procedure for preparing barite samples for chemical and isotopic analysis is described. Sulfate ion, in barite, in the presence of high concentrations of aqueous sodium carbonate, is replaced by carbonate. This replacement forms insoluble carbonates with the cations commonly in barite: Ba, Sr, Ca and Pb. Sulfate is...
A two-dimensional dam-break flood plain model
T. V. Hromadka II, C. E. Berenbrock, J. R. Freckleton, G. L. Guymon
1985, Advances in Water Resources (8) 7-14
A simple two-dimensional dam-break model is developed for flood plain study purposes. Both a finite difference grid and an irregular triangle element integrated finite difference formulation are presented. The governing flow equations are approximately solved as a diffusion model coupled to the equation of continuity. Application of the model to...
Removal of iron interferences by solvent extraction for geochemical analysis by atomic-absorption spectrophotometry
L. Zhou, T. T. Chao, R. F. Sanzolone
1985, Talanta (32) 475-478
Iron is a common interferent in the determination of many elements in geochemical samples. Two approaches for its removal have been taken. The first involves removal of iron by extraction with methyl isobutyl ketone (MIBK) from hydrochloric acid medium, leaving the analytes in the aqueous phase. The second consists of...
Potentiometric map of the Eutaw-McShan aquifer in northeastern Mississippi, fall 1982
Daphne Darden
1985, Water-Resources Investigations Report 85-4042
No abstract available....
SAS program for quantitative stratigraphic correlation by principal components
M.E. Hohn
1985, Computers & Geosciences (11) 471-477
A SAS program is presented which constructs a composite section of stratigraphic events through principal components analysis. The variables in the analysis are stratigraphic sections and the observational units are range limits of taxa. The program standardizes data in each section, extracts eigenvectors, estimates missing range limits, and computes the...
CLAY MINERALOGY OF INSOLUBLE RESIDUES IN MARINE EVAPORITES.
Marc W. Bodine Jr.
1985, Conference Paper
Insoluble residues from three sequences of Paleozoic marine evaporites (Retsof salt bed in western New York, Salado Formation in south-eastern New Mexico, and Paradox Member of the Hermosa Formation in southeastern Utah) are rich in trioctahedral clays. Chlorite (clinochlore), corrensite (mixed-layer chlorite-trioctahedral smectite), talc, and illite (the only dioctahedral clay)...
Temporal fluctuations in grain size, organic materials and iron concentrations in intertidal surface sediment of San Francisco Bay
E. A. Thomson-Becker, Samuel N. Luoma
1985, Hydrobiologia (129) 91-107
The physical and chemical characteristics of the oxidized surface sediment in an estuary fluctuate temporally in response to physical forces and apparently-fluctuating inputs. These characteristics, which include grain size and concentrations of organic materials and iron, will influence both trace-metal geochemistry and bioavailability. Temporal trends in the abundance of fine...
Locating CVBEM collocation points for steady state heat transfer problems
T. V. Hromadka II
1985, Engineering Analysis (2) 100-106
The Complex Variable Boundary Element Method or CVBEM provides a highly accurate means of developing numerical solutions to steady state two-dimensional heat transfer problems. The numerical approach exactly solves the Laplace equation and satisfies the boundary conditions at specified points on the boundary by means of collocation. The accuracy of...
In situ stress, natural fracture distribution, and borehole elongation in the Auburn Geothermal Well, Auburn, New York
Stephen H. Hickman, John H. Healy, Mark D. Zoback
1985, Journal of Geophysical Research (90) 5497-5512
Hydraulic fracturing stress measurements and a borehole televiewer survey were conducted in a 1.6‐km‐deep well at Auburn, New York. This well, which was drilled at the outer margin of the Appalachian Fold and Thrust Belt in the Appalachian Plateau, penetrates approximately 1540 m of lower Paleozoic sedimentary rocks and terminates...
REGIONAL GROUND-WATER-QUALITY NETWORK DESIGN.
William E. Templin
Schmidt Kenneth D., editor(s)
1985, Conference Paper
This paper describes the approach used in designing a regional network to monitor the complex ground-water-quality conditions in the San Joaquin Valley, California. The actual network approximates the ideal network with the constraint of primarily using wells that are already being monitored by someone for some purpose. Further inventories of...
Pyrolysis-mass spectrometry/pattern recognition on a well-characterized suite of humic samples
P. MacCarthy, S.J. DeLuca, K.J. Voorhees, Ronald L. Malcolm, E.M. Thurman
1985, Geochimica et Cosmochimica Acta (49) 2091-2096
A suite of well-characterized humic and fulvic acids of freshwater, soil and plant origin was subjected to pyrolysis-mass spectrometry and the resulting data were analyzed by pattern recognition and factor analysis. A factor analysis plot of the data shows that the humic acids and fulvic acids can be segregated into...
40Ar/39Ar and K-Ar data bearing on the metamorphic and tectonic history of western New England
J. F. Sutter, N. M. Ratcliffe, S.B. Mukasa
1985, Geological Society of America Bulletin (96) 123-136
40Ar/39Ar ages of coexisting biotite and hornblende from Proterozoic Y gneisses of the Berkshire and Green Mountain massifs, as well as 40Ar/39Ar and K-Ar mineral and whole-rock ages from Paleozoic metamorphic rocks, suggest that the thermal peak for the dominant metamorphic recrystallization in western New England occurred 465 ± 5 m.y....
Map of Antelope Valley-East Kern Water Agency area, California, showing ground-water subunits and areas, location of wells, and lines of equal depth to water for spring 1983
W. R. Moyle Jr., Florence M. Glenn
1985, Open-File Report 84-726
No abstract available....
Disturbance of diving ducks by boaters on a migrational staging area
C. E. Korschgen, L. S. George, W. L. Green
1985, Wildlife Society Bulletin (13) 290-296
No abstract available....
Nonpoint-source discharges and water quality of the Elk Creek basin, west-central Wisconsin
S. J. Field
1985, Water-Resources Investigations Report 84-4094
The Elk Creek basin in west-central Wisconsin was studied during the 1980 water year to define the water quality in relation to streamflow. Agricultural nonpoint-source discharges were suspected of contributing significantly to degraded water quality. Two water quality and streamflow gaging stations were established--one on Elk Creek near Independence and...
Remote sensing; a geophysical perspective
K. Watson
1985, Geophysics (50) 2595-2610
In this review of developments in the field of remote sensing from a geophysical perspective, the subject is limited to the electromagnetic spectrum from 0.4 mu m to 25 cm. Three broad energy categories are covered: solar reflected, thermal infrared, and microwave.The reflected solar region has been the most intensely...
Determination of carbonate carbon in geological materials by coulometric titration
E.E. Engleman, L. L. Jackson, D. R. Norton
1985, Chemical Geology (53) 125-128
A coulometric titration is used for the determination of carbonate carbon in geological materials. Carbon dioxide is evolved from the sample by the addition of 2 M perchloric acid, with heating, and is determined by automated coulometric titration. The coulometric titration showed improved speed and precision with comparable accuracy to...
New approach to calibrating bed load samplers
D. W. Hubbell, H.H. Stevens, J. V. Skinner, J.P. Beverage
1985, Journal of Hydraulic Engineering (111) 677-694
Cyclic variations in bed load discharge at a point, which are an inherent part of the process of bed load movement, complicate calibration of bed load samplers and preclude the use of average rates to define sampling efficiencies. Calibration curves, rather than efficiencies, are derived by two independent methods using...
In situ calibration of a high-resolution gamma-ray borehole sonde for assaying uranium-bearing sandstone deposits
J.H. Day Jr.
1985, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment (234) 205-211
A method is presented for assaying radioactive sandstone deposits in situ by using a high-resolution borehole gamma-ray spectrometer. Gamma-ray photopeaks from the same spectrum acquired to analyze a sample are used to characterize gamma-ray attenuation properties, from which a calibration function is determined. Assay results are independent of differences between...
ANALYZING NUMERICAL ERRORS IN DOMAIN HEAT TRANSPORT MODELS USING THE CVBEM.
T. V. Hromadka II
Chung Jin S.Lunardini Virgil J.Chakrabarti S.K.Wang Y.S.Sodhi D.S.Karal K., editor(s)
1985, Conference Paper, Proceedings of the International Offshore Mechanics and Arctic Engineering Symposium
Besides providing an exact solution for steady-state heat conduction processes (Laplace Poisson equations), the CVBEM (complex variable boundary element method) can be used for the numerical error analysis of domain model solutions. For problems where soil water phase change latent heat effects dominate the thermal regime, heat transport can be...
Map showing the potentiometric surface of the Magothy aquifer in southern Maryland, September 1983
Frederick K. Mack, Judith C. Wheeler, Stephen E. Curtin
1985, Water-Resources Investigations Report 85-4000
No abstract available....
