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The AAPG/Datapages Combined Publications Database
Showing 3,218 Results. Searched 200,616 documents.
Pebble Shape (and Size!)
Werner K. Illenberger
Journal of Sedimentary Research (SEPM)
... spherical. This phenomenon shows that the shape factors are inter-related and that the indices cannot be considered on their own when determining...
1991
Diagenesis of Knox Group in Christiansburg Fenster, Southwestern Virginia
Paul L. Broughton
AAPG Bulletin
... (standard deviation of 0.46-0.83 ^phgr), well-rounded, apparently spherical grains of quartz in carbonate ooze indicate a mixing of the products of two...
1972
Redox Conditions during Deposition and Early Diagenesis of the Upper Ordovician Point Pleasant Limestones of Southwestern Pennsylvania and Northern West Virginia; #51537 (2018)
Randy Blood
Search and Discovery.com
... waters at the time sediments were deposited in both recent and ancient deposits. • types of pyrite of interest • Framboids: spherical aggregates...
2018
From Arrhenius to CO2 Storage: Part III: A Simple Greenhouse Model
Martin Landrø, Lasse Amundsen
GEO ExPro Magazine
... not continuously reach each square meter of the Earth's spherical surface. As shown in the figure on the opposite page, the area of the Earth...
2019
Graphical Methods of Calculation in Interpretation in Work with the Torsion Balance: DISCUSSION
Donald C. Barton
AAPG Bulletin
... of symmetry, the sole advantage of the various methods making use of spherical or cylindrical coordinates is that one chart or a set of two charts is applicable...
1929
Stratigraphy Oklahoma-Texas Panhandles
B. J. Cunningham
Panhandle (Texas) Geological Society
... in approximately the same area as the underlying Simpson group and attains a thickness in excess of 300 feet in Roberts and Hemphill Counties. The Viola...
1961
Dolomite Reservoir Rocks: Processes, Controls, Porosity Development
Graham R. Davies
AAPG Special Volumes
..., intercrystalline porosity and permeability increase. When dolomite exceeds 90%, porosity and permeability again decrease as excess dolomite is added...
1979
Analytical Methods for Determining Small Quantities of Mercury in Natural Gas
M. Muchlis
Indonesian Petroleum Association
... are usually made from borosilicate or silica glass and tygon tubing of 200 mm length and 5 to 7 mm inside diameters. The tubes should have spherical joints...
1981
Peculiar Phases of Oil Saturation in Certain Sandstones
Glen M. Ruby
AAPG Bulletin
... a spherical form or becomes a short cylinder, depending upon stream action. If entrapped in an eddy it soon rolls into a perfect sphere but if rolled...
1923
The Stratigraphic and Structural Development of the Givetian-Frasnian Reef Complex, Limestone Billy Hills, Western Pillara Range, W.A.
W. D. M. Hall
Petroleum Exploration Society of Australia (PESA)
... faults with vertical displacements locally in excess of 100 m. The termination of a number of faults close to the base of the Gogo Formation where...
1984
The Canning Basin W.A.
P.G. Purcell
Petroleum Exploration Society of Australia (PESA)
... of north to northeast trending normal faults with vertical displacements locally in excess of 100 m. The termination of a number of faults close to the base...
1984
Organic Remains in Meteorites--A Review of the Problem
F. L. Staplin
CSPG Bulletin
... of salts, some water soluble. Excess volatiles would eventually be lost. Orgueil and Ivuna meteorites have no olivine and lack free metals. According...
1962
Geology and Geophysics of the Gulf of Mexico
Paul L. Lyons
Tulsa Geological Society
... filled with sediments. It is the greatest negative anomaly on the map, reaching a minus 200 milligals. In the case of the Gulf, an excess of mass...
1957
A New Approach to Fracturing Treatment with Unconventional Shaped Proppant at Telisa Formation
Ficky Kusuma Adijaya, Muhamad Wildan, Pedro Artola, Cesar Guimaraes, Luciana Soetikno
Indonesian Petroleum Association
... conventional spherical particles. The improved conductivity can help to significantly improve the retained conductivity of the pack (fracture pack...
2012
Enigmatic linear furrows and pits on the upper continental slope, northwest Labrador Sea: are they sediment furrows or feeding traces?
Heiner Josenhans, Chris Woodworth-Lynas
Atlantic Geology
.... Near the end of the dive some of the furrows and pits were seen to be occupied by dense, spherical yellow sponges balls up to 30 cm in diameter. Most...
1988
Palynological Fossil Response to Low-Grade Metamorphism in the Arkoma Basin
L. R. Wilson
Tulsa Geological Society
... microfossils apparently do not occur in the Arkoma basin coals of eastern Oklahoma where the fixed carbon is in excess of 70%. This fact has been related...
1961
Quantitative Estimations of Clay Minerals by Diffraction Methods
W. D. Johns, R. E. Grim, W. F. Bradley
Journal of Sedimentary Research (SEPM)
... scattering contribution at an angle corresponding to 7 A indicates an interlayer population in excess of that afforded by exchange cations alone...
1954
The Lateral Distribution of Clay Minerals in Lakes Pontchartrain and Maurepas, Louisiana
Robert A. Brooks, Ray E. Ferrell, Jr.
Journal of Sedimentary Research (SEPM)
... of 2.56 or greater had settled more than 5 cm. The material which had not settled was finer-than-2 microns, equivalent spherical diameter...
1970
Early Diagenetic Polyframboidal Pyrite, Primary and Redeposited, from the Wenlockian Denbigh Grit Group, Conway, North Wales, U.K.
Leonard G. Love
Journal of Sedimentary Research (SEPM)
... be obtained. There is also a slight tendency to flattening in the plane of cleavage of the rock. Despite the strong tendency to an initial spherical form...
1971
Bulk Volume Reduction and Pressure-Solution Derived Cement
Ronald W. Manus, Alan H. Coogan
Journal of Sedimentary Research (SEPM)
...; Thomson, 1959). We have shown that, for spherical models at least, the amount of pore reduction owing to the infill of pressure-solution derived cement...
1974
Vertical Variation in Strength and Porosity of Calcrete (Nari) on Chalk, Shefela, Israel and Interpretation of its Origin
Dan H. Yaalon, Shmuel Singer
Journal of Sedimentary Research (SEPM)
... was determined by acid dissolution and backtitration of the excess of acid. Several typical thin sections were examined, but no quantitative measurements were...
1974
Recognition of Hardgrounds and Emersion Surfaces: A New Criterion
Soumen Sarkar, Ajit Bhattacharyya, S. K. Chanda
Journal of Sedimentary Research (SEPM)
... record is concerned, such excess stresses are rarely developed within the normal range of lithostatic pressure likely in compaction unless stress...
1980
Smectite Diagenesis and Sandstone Cement: The Effect of Reaction Temperature
R. W. Lahann
Journal of Sedimentary Research (SEPM)
... source of silica cement in sedimentary rocks: Jour. Sed. Petrology, v. 32, p. 26-28. WEISS, A., NOTHNAGEL, K. H., 1971, Self-diffusion of spherical...
1980
Density and Porosity of Sea-floor Surface Sediments off San Diego, California
Edwin L. Hamilton , Henry W. Menard
AAPG Bulletin
.... Collections were made at more than thirty stations. The diver, by using an excess of weight in his weight belt, was able to lie on the bottom; there he could...
1956
Dolomitized Glauconite Granules: A New Kind of Peloid From Proterozoic Strata of Central India
Ajit Bhattacharyya, S. K. Chanda, Gerald M. Friedman
Journal of Sedimentary Research (SEPM)
... of rocks. The peloids are discrete sedimentary grains, more or less spherical or elliptical in outline. In outcrop and hand-specimen, the peloids appear...
1986