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The AAPG/Datapages Combined Publications Database
Showing 800 Results. Searched 195,689 documents.
Feldspar--Grain Size Relations in Cambrian Arenites, Upper Mississippi Valley
I. Edgar Odom
Journal of Sedimentary Research (SEPM)
... positive skewness. Bimodal size distributions are occasionally present. In the western Wisconsin outcrop area, the Mt. Simon is more than 100 m thick...
1975
Grandfather Mountain Formation: Depositional Environment, Provenance, and Tectonic Setting of Late Precambrian Alluvium in the Blue Ridge of North Carolina
Frederic L. Schwab
Journal of Sedimentary Research (SEPM)
... matrix. Figure 3 plots mean phi size vs. phi sorting of sandstone and siltstone. Most are moderately or poorly sorted (mean sorting is 2.1). Skewness...
1977
Dust-Storm Sediments of Lubbock Area, Texas
Kerby E. Laprade
AAPG Bulletin
... of the sediments shows a slight skewness toward the fine-grain side o the median diameter. Figure 11 is roundness curves, showing the average roundness...
1957
Carbonate-siliciclastic Facies Transition and Reef Growth on the Northeast Coast of Barbados, West Indies
Kelly Lee Acker, Colin W. Stearn
Journal of Sedimentary Research (SEPM)
... in the analysis of the skeletal carbonate composition. The graphic mean, inclusive graphic standard deviation (sorting), inclusive graphic skewness, and the graphic...
1990
Relationships Between Wave-Induced Currents and Sediment Grain Size on a Sandy Tidal-Flat
G.C. Malvarez, J.A.G. Cooper, D.W.T Jackson
Journal of Sedimentary Research (SEPM)
..., and skewness of the distribution as well as settling velocities. Results from the sediment particle analysis are directly geo-referenced because sample...
2001
Pattern of Sediment Transport in a Microtidal River Mouth Using Geostatistical Sediment-Trend Analysis
Gregoire M. Maillet, Emmanuel Poizot, Francois Sabatier, Claude Vella, Yann Mear
Journal of Sedimentary Research (SEPM)
... Corporation to calculate statistical parameters of mean, sorting, and skewness with the arithmetic method (Coulter Corporation 1992). Modeling of Marine...
2011
Eolian Environment: Chapter 3
Edwin D. McKee, William C. Ward
AAPG Special Volumes
... limestone polishes more easily than coral fragments and these polish more easily than Halimeda flakes. Skewness Little attention seems to have been given...
1983
End-Member Modeling of Siliciclastic Grain-Size Distributions: The Late Quaternary Record of Eolian and Fluvial Sediment Supply to the Arabian Sea and Its Paleoclimatic Significance
Maarten A. Prins, Gert Jan Weltje
Special Publications of SEPM
... subpopulations with vari able skewness Decomposition into unimodal SFf distributions has been applied to volcanic ash and pyroclastic grain size...
1999
Sedimentary Belts in Lagoon of Kapingamarangi Atoll
Edwin D. McKee , John Chronic , Estella B. Leopold
AAPG Bulletin
...,(FOOTNOTE 5) and none contains more than a few grains of very fine sand or silt size (<.125 mm.); many samples show virtually no skewness and where it does...
1959
Sedimentation on the Antarctic Continental Slope
John B. Anderson, Dennis D. Kurtz, Fred M. Weaver
Special Publications of SEPM
... of cumulative and frequency curves moment measures of mean grain size I M and standard deviation 1 and graphic measures of skewness SK and kurtosis KG...
1979
THE MORPHODYNAMICS AND SEDIMENTOLOGY OF A SEASONALLY CONTROLLED MICROTIDAL TIDAL INLET: THE NARIVA RIVER TIDAL INLET, COCOS BAY, TRINIDAD
Saeed Khan, Brent Wilson, Ryan Ramsook, Hasley Vincent
Journal of Sedimentary Research (SEPM)
... for dry sieving after Folk (1980) and Vincent et al. (2014). Statistical mean, sorting, skewness, and kurtosis were calculated using the GRADISTAT...
2023
Late Pleistocene climate variation on the Khorat Plateau, northeastern Thailand inferred from the remnants of sand dunes
Patcharaporn Ngernkerd, Montri Choowong, Nutcha Choowong, Peerasit Surakiatchai
Geological Society of Malaysia (GSM)
... sequence, including 25 samples. Their textural parameters including mean size, standard deviation (sorting), skewness, and kurtosis were calculated...
2021
Geology and Geochemistry of Reefs, Carbonate Sediments, and Waters, Gulf of Aqaba (Elat), Red Sea
Gerald M. Friedman
Journal of Sedimentary Research (SEPM)
.... Skewness (third moment, 3) values are near zero; some sands are slightly positively skewed (+0.08 to +0.17), whereas others are slightly negatively...
1968
Grain Size Distributions and Depositional Processes
Glenn S. Visher
Journal of Sedimentary Research (SEPM)
... transport and deposition. Preliminary conclusions concerning sorting, skewness, and mean size were derived by Inman (1949). He did not, however, relate...
1969
Montoya Group Stratigraphy (Ordovician) of Trans-Pecos Texas
Herbert J. Howe
AAPG Bulletin
.... Stetson and Upson (1937, p. 57) found 1.45 to be average for well sorted, near-shore sediments. The coefficient of skewness (Sk) varies from 0.96 to 1.034...
1959
Bays of Central Texas Coast
Francis P. Shepard , David G. Moore
AAPG Special Volumes
... is given following Inman (1952), as = 1/2 a2, a2 being the difference in phi units between the 16 and 84 percentiles and skewness as = a3 in which a3...
1960
Sedimentary Input and Diagenesis on a Carbonate Slope (Bahamas): Response to Morphologic Evolution of the Carbonate Platform and Sea-Level Fluctuations
Hildegard Westphal, John J. G. Reijmer, Martin J. Head
Special Publications of SEPM
... count about 25 plots at ment volume This by specific histogram bimodal a upper Pliocene Other toids and sparry cement skewness count...
1999
Relation of Biofacies to Lithofacies in Interpreting Depositional Environments in the Pitkin Limestone (Mississippian) in Northeastern Oklahoma (Part I)1
Robert S. Fabian
Oklahoma City Geological Society
... diversity, and lithofacies. The size-frequency histogram (Fig. 4-1) of the brachiopod Diaphragmus is nearly bell shaped and has a near symmetrical skewness...
1989
Petrology and Diagenesis of Deep-Water Sandstones, Ouachita Mountains, Arkansas and Oklahoma
Robert C. Morris, Kenneth E. Proctor, Michael R. Koch
Special Publications of SEPM
... Number Unit and of Median l Md Samples State Sorting Mean Skewness 1 1 7 I M 0 Porosity Permeability Md 1 Jackfork Group 35 2 91 3...
1979
Holocene Transgression and Coastal-Landform Evolution in Northeastern Lake Erie, Canada
John P. Coakley
Special Publications of SEPM
... section and in the top portion of the unit in the other bore holes Skewness is generally positive Excluding the fine grained upper section in BH3 unit 3...
1992
Significance of Constituent Composition, Texture, and Skeletal Breakdown in Some Recent Carbonate Sediments
Jonathan P. Swinchatt
Journal of Sedimentary Research (SEPM)
... it (mean size, standard deviation or sorting, skewness and kurtosis), the abundance of lime mud (or grains of diameter les than 62 microns...
1965
Mesoscopic Characterization of the Heterogeneity within Tight Carbonate Gas Reservoir, Outcrop Study, Saudi Arabia
Mutasim Osman, Osman Abdullatif
Unconventional Resources Technology Conference (URTEC)
... 35.63 39.09 Minimum 2.52 5.72 10.88 2.52 Skewness 0.33 -0.36 -0.14 0.20 Kurtosis -0.86 -0.79 -0.57 -0.92 Variance 23.64 91.31...
2021
Recent Sedimentation and the Search for Petroleum
W. C. Krumbein
AAPG Bulletin
.... For each particle property there is an average, a measure of spread ("sorting"), a measure of asymmetry (skewness), and a measure of peakedness...
1945
Experiments on Longshore Transport and Sorting of Pebbles: Chesil Beach, England
A. P. Carr
Journal of Sedimentary Research (SEPM)
...) of recovered material. The variations in skewness and kurtosis (and mean, as shown in Tables 1 and 3) suggest at least some variation in the population...
1971
Petrology of the Kinnikinic Quartzite (Middle Ordovician), East-Central Idaho
W. Calvin James , Robert Q. Oaks, Jr.
Journal of Sedimentary Research (SEPM)
... ) with an average for all thin sections of moderately well-sorted (0.601 ). Inclusive graphic skewness (Folk and Ward, 1957) ranges from strongly fine-skewed...
1977