Managing mapping data using commercial data base management software.
A.A. Elassal
1985, Photogrammetric Engineering and Remote Sensing (51) 1133-1136
Electronic computers are involved in almost every aspect of the map making process. This involvement has become so thorough that it is practically impossible to find a recently developed process or device in the mapping field which does not employ digital processing in some form or another. This trend, which...
Resolving controls on epeiric sedimentation using trend surface analysis
W.L. Watney
1985, Journal of the International Association for Mathematical Geology (17) 427-454
An understanding of patterns of regional sedimentation is crucial to identifying trends of perspective petroleum reservoirs. The Upper Pennsylvanian, Missourian Kansas City Group consists of repetitions of widespread carbonate rock and shale. Each of four cyclothems chosen for subsurface study of western Kansas contains transgressive and regressive lithofacies with evidence...
Strontium and oxygen isotopic variations in Mesozoic and Tertiary plutons of central Idaho
R.J. Fleck, R.E. Criss
1985, Contributions to Mineralogy and Petrology (90) 291-308
Regional variations in initial 87Sr/86Sr ratios (ri) of Mesozoic plutons in central Idaho locate the edge of Precambrian continental crust at the boundary between the late Paleozoic-Mesozoic accreted terranes and Precambrian sialic crust in western Idaho. The ri values increase abruptly but continuously from less than 0.704 in the accreted...
Calaveras reversed: Westward younging is indicated
P. C. Bateman, A. G. Harris, R. W. Kistler, K.B. Krauskopf
1985, Geology (13) 338-341
Samples of limestone collected from strata in the southern part of the western metamorphic belt of the Sierra Nevada, which traditionally have been assigned to the Calaveras Formation, have yielded Early Triassic conodonts, and samples of metavolcanic rock indicate an Early Jurassic Rb-Sr...
Correlation of the Rockland ash bed, a 400,000-year-old stratigraphic marker in northern California and western Nevada, and implications for middle Pleistocene paleogeography of central California
A.M. Sarna-Wojcicki, C.E. Meyer, H. R. Bowman, Hall N. Timothy, P.C. Russell, M.J. Woodward, J. L. Slate
1985, Quaternary Research (23) 236-257
Outcrops of an ash bed at several localities in northern California and western Nevada belong to a single air-fall ash layer, the informally named Rockland ash bed, dated at about 400,000 yr B.P. The informal Rockland pumice tuff breccia, a thick, coarse, compound tephra deposit southwest of Lassen Peak in...
10Be analysis of a Quaternary weathering profile in the Virginia Piedmont
M.J. Pavich, Louis Brown, J. Nathalie Valette-Silver, Jeffrey Klein, Roy Middleton
1985, Geology (13) 39-41
Samples from a residual weathering profile in the Virginia Piedmont have been analyzed for cosmogenic 10Be. Concentrations are highest in clay-rich soil and decrease exponentially to a depth of about 15 m. Despite uncertainties about the processes by which 10Be may be intercepted before entering...
Sedimentary framework of Penobscot Bay, Maine
Harley J. Knebel, Kathryn M. Scanlon
1985, Marine Geology (65) 305-324
Analyses of seismic-reflection profiles, along with previously collected sediment samples and geologic information from surrounding coastal areas, outline the characteristics, distribution, and history of the strata that accumulated within Penobscot Bay, Maine, during the complex period of glaciation, crustal movement, and sea-level change since late Wisconsinan time. Sediments that overlie...
Determining relative error bounds for the CVBEM
T. V. Hromadka II
1985, Engineering Analysis (2) 75-80
The Complex Variable Boundary Element Methods provides a measure of relative error which can be utilized to subsequently reduce the error or provide information for further modeling analysis. By maximizing the relative error norm on each boundary element, a bound on the total relative error for each boundary element can...
Crustal refraction profile of the Long Valley caldera, California, from the January 1983 Mammoth Lakes earthquake swarm
James H. Luetgert, Walter D. Mooney
1985, Bulletin of the Seismological Society of America (75) 211-221
Seismic-refraction profiles recorded north of Mammoth Lakes, California, using earthquake sources from the January 1983 swarm complement earlier explosion refraction profiles and provide velocity information from deeper in the crust in the area of the Long Valley caldera. Eight earthquakes from a depth range of 4.9 to 8.0 km confirm...
Separation of solute and particulate vectors of heavy metal uptake in controlled suspension-feeding experiments with Macoma balthica
Ronald W. Harvey, Samuel N. Luoma
1985, Hydrobiologia (121) 97-102
Radioisotope labelling experiments with the estuarine clam, Macoma balthica, are described, in which a filter chamber device was used to separate solute metal uptake from uptake, of metals associated with suspended bacteria. Solute uptake contributed a majority of the 14-day total body burdens of 65Zn and 109Cd, whereas 57Co uptake...
Sulphur in char and char desulphurization by acid leaching and hydropyrolysis
I.-M. Chou, D.M. Loffredo
1985, Fuel (64) 731-734
Sulphur compounds volatilized during pyrolysis of acid-leached char were measured to determine characteristics of char desulphurization reactions. Pyrolysis of char in a hydrogen atmosphere (hydropyrolysis) produced a much higher concentration of thiophenic organics compared with that produced during pyrolysis in a nitrogen atmosphere. Hydrogen sulphide gas evolution, at progressively increasing...
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...
Time scales of circulation and mixing processes of San Francisco Bay waters
R. A. Walters, R. T. Cheng, T. J. Conomos
1985, Hydrobiologia (129) 13-36
Conceptual models for tidal period and low-frequency variations in sea level, currents, and mixing processes in the northern and southern reaches of San Francisco Bay describe the contrasting characteristics and dissimilar processes and rates in these embayments: The northern reach is a partially mixed estuary whereas the southern reach...
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...
Statistical evaluation of an inductively coupled plasma atomic emission spectrometric method for routine water quality testing
J.R. Garbarino, B. E. Jones, G.P. Stein
1985, Applied Spectroscopy (39) 535-541
In an interlaboratory test, inductively coupled plasma atomic emission spectrometry (ICP-AES) was compared with flame atomic absorption spectrometry and molecular absorption spectrophotometry for the determination of 17 major and trace elements in 100 filtered natural water samples. No unacceptable biases were detected. The analysis precision of ICP-AES was found to...
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...
Geochemistry: Uses for synthetic fluid inclusions in quartz crystals
E. Roedder
1985, Nature (315) 544-545
[No abstract available]...
The effect of glaciers on streamflow variations
Andrew G. Fountain, Wendell V. Tangborn
1985, Water Resources Research (21) 579-586
The effect of temperate glaciers on runoff variations is examined for the North Cascade Mountains of Washington State. The principal influences of glaciers on streamflow are often unexpected contributions to streamflow volume, a delay of the maximum seasonal flow, and a decrease in annual and monthly variation of runoff. The...
The Schwartzwalder uranium deposit. I: Geology and structural controls on mineralization.
A. R. Wallace, R. C. Karlson
1985, Economic Geology (80) 1842-1857
Numerous uranium veins occupy fractures and faults in brittle Proterozoic gneisses along the east central Front Range of Colorado. The deposit size correlates with the density and localization of brittle fracture. The largest deposit, the Schwartzwalder, is explained by a singular configuration of complexly broken, deep-reaching brittle gneisses between impervious...
COMPARISON OF RECORDING CURRENT METERS USED FOR MEASURING VELOCITIES IN SHALLOW WATERS OF SAN FRANCISCO BAY, CALIFORNIA.
Jeffrey W. Gartner, Richard N. Oltmann
1985, Conference Paper, Oceans Conference Record (IEEE)
The authors determine the feasibility of collecting reliable current-meter data in shallow water under natural conditions. The study involved field testing four types of recording current meters (different speed sensors) and comparing data recorded by the meters under different field conditions. Speeds recorded by the current meters at slack water...
Movement of volatile organics through a fractured rock aquifer
S.E. Spayd
1985, Groundwater (23) 496-502
In response to the detection of contaminants in several municipal water supply wells in a northern New Jersey community, the New Jersey Department of Environmental Protection (NJDEP) undertook a detailed assessment of the movement of volatile organics through the Brunswick fractured rock aquifer. Understanding the...
GEOLOGIC ASPECTS OF TIGHT GAS RESERVOIRS IN THE ROCKY MOUNTAIN REGION.
Charles W. Spencer
1985, JPT, Journal of Petroleum Technology (37) 1308-1314
The authors describe some geologic characteristics of tight gas reservoirs in the Rocky Mountain region. These reservoirs usually have an in-situ permeability to gas of 0. 1 md or less and can be classified into four general geologic and engineering categories: (1) marginal marine blanket, (2) lenticular, (3) chalk, and...
Reduction of hexavalent chromium in water samples acidified for preservation
Kenneth G. Stollenwerk, D.B. Grove
1985, Journal of Environmental Quality (14) 396-399
Reduction of hexavalent chromium, Cr(VI), in water samples, preserved by standard techniques, was investigated. The standard preservation technique for water samples that are to be analyzed for Cr(VI) consists of filtration through a 0.45‐µm membrane, acidification to a pH < 2, and storage in plastic bottles. Batch...
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...
Error bounds in cascading regressions
M.R. Karlinger, B.M. Troutman
1985, Journal of the International Association for Mathematical Geology (17) 287-295
Cascading regressions is a technique for predicting a value of a dependent variable when no paired measurements exist to perform a standard regression analysis. Biases in coefficients of a cascaded-regression line as well as error variance of points about the line are functions of the correlation coefficient between dependent and...
