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Showing 17,710 Results. Searched 201,049 documents.
Paleocurrent Analysis of the Mainly Fluviatile Permian and Triassic Beacon Rocks, Beardmore Glacier Area, Antarctica
Peter J. Barrett
Journal of Sedimentary Research (SEPM)
... the sums of squares. This tends to give a slightly larger error sum of squares (in practice of the order of one percent) than that obtained by using...
1970
Metamorphic Terrane Favored Over Rocky Mountains as Source of Claiborne Group, Eocene, Texas Coastal Plain
Ann Boggs McCarley
Journal of Sedimentary Research (SEPM)
...). The overall average of these 37 samples is 47 percent quartz, 27 percent feldspar (primarily plagioclase and microcline), 22 percent granite and gneiss...
1981
Nomenclature for Sedimentary Rocks
Russell B. Travis
AAPG Bulletin
...% Because calcite makes up more than 50 percent of this rock, some workers might call it a limestone. According to the convention of Figure 1, however...
1970
Reservoir Heterogeneities of Some Cretaceous Sandstones
Charles F. Dodge , Dennis P. Holler , Robert L. Meyer
AAPG Bulletin
... cement in the rock increases. Porosity decreases as the percent cement increases. If preferred directional properties exist, permeability should...
1971
Porosity Variation in the Tensleep and its Equivalent the Weber Sandstone, Western Wyoming: A Log and Petrographic Analysis
J.E. Fox, P.W. Lambert, R.F. Mast, N.W. Nuss, R.D. Rein
Rocky Mountain Association of Geologists
... percent or greater) occur around the flanks of the Bighorn and Wind River Basins; there the Tensleep is considered to have excellent reservoir...
1975
Fluctuations of Water Level, Water Quality and Biota of Great Salt Lake, Utah, 1847–1986
Doyle Stephens, Ted Arnow
Utah Geological Association
..., farming, and wildlife. Accompanying the rapid rise in lake level has been a decrease in salinity from 28 percent in 1963 to about 5 percent in 1986...
1987
GEOLOGY OF THE FORTY ACRE ABERFELDY STEAM PILOT
H.O. Maccagno and M.D. Watson
Saskatchewan Geological Society
... content, which is typically less than five weight percent of bulk. Cross plots of mean grain diameter versus sorting illustrate changing textural...
1980
Dry Hole Money . . .: The Fair Contribution
John H. Folks
Oklahoma City Geological Society
... is determined by its geographical distance from the proposed location (Fig. 1). In applying this method, 50 percent of the dry hole cost is charged...
1958
Recent Sycamore Development in Stephens County, Oklahoma
Lee R. Riley
Oklahoma City Geological Society
... it appears that five percent or greater porosity is necessary for effective production. Using this parameter a map (Figure 9) has been constructed...
1976
Comparative Petrologic Analysis of Argillite and Sandstone from the Bedford Canyon Formation, Santa Monica Slate and Chatsworth Formation Conglomerate Clasts
Eric R. West, Ivan P. Colburn
Pacific Section SEPM
... content in the Bedford Canyon Formation argillite specimens ranges from 50f to 90 percent (Table 1), and the argillite is generally interbedded...
1982
History of Uranium and Development of Colorado Plateau Ores with Notes on Uranium Production in Utah
R. E. Cohenour
Utah Geological Association
..., includes Pb-214 and Bi-214 which supply over 85 percent of the gamma rays from “uranium” detected by field counters, airborne units, and hole probes...
1967
A Method for Estimating Gross Sand Percentage and Reservoir Thicknesses from Seismic Sections: Example from Segno Field, Polk Co., Texas
Richard E. Bischke and Daniel J. Tearpock
Houston Geological Society Bulletin
... that compare favorably to local well log data. In this paper we discuss a method for estimating percent sand and depth to reservoir from growth...
1993
Differentiation of Modern Sand Bodies by Linear Discriminant Analysis
R. J. Moiola, A. B. Spencer, D. Weiser
GCAGS Transactions
..., because a sieve analysis is a closed table, that is, it totals 100 percent, one interval must be deleted so that no input variables are linear...
1974
Caprock Formation and Diagenesis, Gyp Hill Salt Dome, South Texas) (1)
Shirley P. Dutton, Charles W. Kreitler
GCAGS Transactions
... at the surface and up to 273 (300 to 895 ft) of gypsum cemented anhydrite above the salt. Samples from the salt contain 13 to 42 percent disseminated...
1980
Pearl Queen Perlite Mine, Beaver County Utah
O. Jay Gatten
Utah Geological Association
... temperature hydration of obsidian. Perlite is an aluminosilicate rock containing about 74 percent amorphous SiO2, 12 percent Al2O3, 3 percent Na2O, 4...
2006
New Albany Shale Group (Devonian-Mississippian) Source Rocks and Hydrocarbon Generation in the Illinois Basin
Mary H. Barrows, Robert M. Cluff
AAPG Special Volumes
..., anoxic shales contain high amounts (2.5 to 9 percent total organic content [TOC]) of sapropelic, Type II kerogen. Predominant organic components...
1984
The Multiple-Cone Sample Splitter
Richard C. Kellagher, Francis J. Flanagan
Journal of Sedimentary Research (SEPM)
...,shortens the time necessary to reduce samples to grain-counting size by about 75 percent. A sample design has been set up by which three methods...
1956
Sediments from Danish Lakes
Kaj Hansen
Journal of Sedimentary Research (SEPM)
... nitrogen ratio. If the content of organic carbon is less than 50 percent and the C/N ratio less than 10 the humus is neutral, and if the content of organic...
1959
Porosity Through Dolomitization: Conservation-Of-Mass Requirements
Peter K. Weyl
Journal of Sedimentary Research (SEPM)
... of carbonate. This can be expressed by the chemical equation Mg2++2CaCO3MgCa(CO3)2+Ca2+. The porosity of the rock is not only affected by the 13 percent...
1960
Buoyancy in Debris Flows
Monty A. Hampton
Journal of Sedimentary Research (SEPM)
... was tested experimentally using slurries of kaolin and water, mixed in predetermined proportions of 68, 72, and 76 weight-percent water. Measured...
1979
Effect of Postsedimentation Processes on Carbonate Reservoir Rocks in Volga-Urals Region, USSR
S. G. Sarkisyan , M. A. Politykina , G. V. Chilingarian
AAPG Bulletin
.... End_of_Article - Last_Page 1313------------ At present, more than 45 percent of the world's petroleum reserves are in carbonate formations...
1973
Evidences of Primary Oil Migration
Kinji Magara
AAPG Bulletin
... in the Russian platform, based on 25,742 samples (Ronov, 1958). Figure 2 is a similar plot of organic carbon percent versus grain size of sediments in the Bering...
1980
Analysis of Pore Networks and Reservoir Quality of the Upper Cretaceous Woodbine Sandstone in the High-Recovery- Efficiency, Giant East Texas Field
Robert G. Loucks, Robert M. Reed, William A. Ambrose
GCAGS Journal
... percent. The sandstone has a stable mineralogy consisting predominantly of quartz with very minor amounts of rock fragments and feldspar, and it also has...
2015
Land Ownership in Wyoming
Gandi R. Rajender
Earth Science Bulletin (WGA)
... on the Eastern side of the State are mostly plains and are to a great extent under private ownership. Federal possession does not exceed 25 percent...
1968
EXTENDED ABSTRACT: THE URANIUM-GOLD-PLATINUM-GROUP ELEMENT ASSOCIATION IN THE GREATER BEAVERLODGE AREA, NORTHERN SASKATCHEWAN
LARRY HULBERT
Saskatchewan Geological Society
... systematic decrease over this interval dropping from approximately 3.5 wt. percent to less than 0.80 wt. percent adjacent to the mineralized zone...
1990