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The AAPG/Datapages Combined Publications Database
Showing 800 Results. Searched 196,121 documents.
Observations on a Dustfall in the Eastern Atlantic, February, 1962
P. M. Game
Journal of Sedimentary Research (SEPM)
... of the mean diameter of 300 randomly distributed grains. The skewness of this overall distribution is probably caused by the fact that the rarer...
1964
Origins of Florida Panhandle Terrace Sands
James William F. Tanner , H. Balsillie , Holly K. Williams
GCAGS Transactions
... relative dispersion of the means, and the standard deviation of the kurtosis values versus standard deviation of the skewness values, all indicate dunes...
1998
Trace Element Chemistry, Heavy Minerals, and Sediment Statistics Of Weddell Sea Sediments
Ernest E. Angino, Robert S. Andrews
Journal of Sedimentary Research (SEPM)
... = 2.08, 2.01; standard deviation = 1.52, 1.34; skewness= -0.33, -0.35, for Hamilton's and our data respectively. The samples from Orcadas in the South...
1968
The Deformed Nature of Various Size Fractions in Some Clastic Sands
M. R. H. Ramez, F. H. Mosalamy
Journal of Sedimentary Research (SEPM)
... 1.414 to 1.783: hence all can be described as being well sorted. The coefficient of skewness is more or less close to unity; and log10sk was found to he...
1969
Tectonics and Sedimentation in a Precambrian Shallow Epicontinental Basin
B. K. Chatterjee, A. K. Bhattacharya
Journal of Sedimentary Research (SEPM)
... are rather well sorted, subrounded, with a moderate skewness (both +ve and -ve) and a moderate kurtosis. The heavy mineral content is low and the ZTR index...
1969
Thunder Bay: An Example of a Silled Fresh-Water Bay
John S. Mothersill
Journal of Sedimentary Research (SEPM)
... distribution at 1.00 phi() intervals by sieving and pipette methods. The skewness, kurtosis, standard deviation and mean size were determined from...
1971
Vertical Orientation of Shells on Some Florida Oyster Reefs
Robert S. Grinnell, Jr.
Journal of Sedimentary Research (SEPM)
... of the Suwannee reefs as having granule to median pebble sizes, variable sorting, and near-symmetrical skewness and kurtosis. In two samples (SR 38...
1974
A Simple Sieving and Splitting Device for Field Analysis of Coarse Grained Sediments
Hillert Ibbeken
Journal of Sedimentary Research (SEPM)
... (fluvioglacial, Pleistocene, Berlin) and the total weight (9, sum of 1-8). TABLE 1. Mean size, standard deviation, skewness and kurtosis of the samples...
1974
Sediment Response to the Present Hydraulic Regime on the Central New Jersey Shelf
William L. Stubblefield, J. William Lavelle, Donald J. P. Swift, Thomas F. McKinney
Journal of Sedimentary Research (SEPM)
... deviation, skewness, and kurtosis of each sample. The values are derived by moment calculations based on a sand fraction recalculated to 100...
1975
GIS and Statistics Applied to the Analysis of the Distribution of Hydrocarbon Reserves by Fields and Formations in the Sureste Basin, Mexico
Sergio Perez Rodriguez
GCAGS Transactions
... of parameters available to diagnose the central tendency of the distributions, as they showed negative skewness, what implies a mode higher than the mean...
2016
Bedding Structures in a Channel Sand Bar of the Ganga River Near Allahabad, Uttar Pradesh, India
Indra Bir Singh
Journal of Sedimentary Research (SEPM)
... parameters are: graphic mean (Mz) = 2.59; inclusive graphic standard deviation (1) = 0.38; inclusive graphic skewness (SKI) = 0.24; kurtosis (K)= 1.3...
1977
Modern Modified Carbonate Grain Flow Deposit
Henry T. Mullins, H. Mark Van Buren
Journal of Sedimentary Research (SEPM)
... skewness values (Fig. 4) indicate that most of the sediments in the deposit are nearly symmetrically distributed except for the very base of the deposit...
1979
Erosion Surfaces Within Giant Fluvial Cross-Beds of the Carboniferous in Northern England
Colin M. Jones , Peter J. Mccabe
Journal of Sedimentary Research (SEPM)
... that the slipface was worked by the separation flow. Changes in the skewness of the bedform crestline could be brought about by slight changes in the flow direction...
1980
Spectral Analysis of the Middle Triassic Latemar Limestone
Linda A. Hinnov, Robert K. Goldhammer
Journal of Sedimentary Research (SEPM)
.... Statistical tests for nonstable variance (Bliss et al. 1956) confirm that the Latemar series is nonstationary. The skewness and kurtosis test statistics...
1991
Stratigraphy of a North Sea Tidal Sand Ridge
Richard A. Davis, Jr., Peter S. Balson
Journal of Sedimentary Research (SEPM)
... ) (Fig. 5). A plot of the first three moments (Fig. 5) shows very interesting trends. Sorting and skewness show almost no change throughout the upper...
1992
Sable Island Bank Off Nova Scotia: Sediment Dispersal and Recent History
Noel P. James , Daniel J. Stanley
AAPG Bulletin
... (after Folk and Ward, 1957), were used to determine the size distribution. Central tendency [EQUATION] Sorting [EQUATION] Skewness [EQUATION...
1968
Visualization Process Approach to Identify Scenarios to Improve Recovery in a Mature and Stratigraphically Complex Reservoir: El Cordon Field; #20100 (2011)
M. Santisteban, E. Altamiranda, M.I. Rodriguez, R. Alvarez, M. Bracho de P.
Search and Discovery.com
... Variance Skewness Kurtosis Coeff. of Variability Range Minimum Range Maximum Range Width Mean Std. Error POES P50 484,591,381.34 POES P90...
2011
Statistical Characterization of Grain-Size Distributions in Sandy Fluvial Systems
Elizabeth A. Hajek, Snehalata V. Huzurbazar, David Mohrig, Ranie M. Lynds, Paul L. Heller
Journal of Sedimentary Research (SEPM)
... symmetrical. For this reason, the log-hyperbolic distribution can better represent asymmetry or skewness exhibited by many empirical GSDs. The log...
2010
Study on the Relationship Between Rock Properties and NMR Measurement of the Low Permeability, Ductile, Shaly Sandstones
Junita Trivianty Musu, Bambang Widarsono
Indonesian Petroleum Association
... curves (Figure 6). Similarities in modes, skewness, and ‘tail’ parts are noticeable. The disagreement between thin section pore size distribution and NMR...
2007
Unusual Till Ridges in the Kitty's Brook Chain Lakes area of West-Central Newfoundland
Christopher M. Tucker
Atlantic Geology
... Standard Deviation Kurtosis Inclusive Graphic Skewness 72-1F 1.130 2.540 very poorly sorted 0.8 Platykurtic 0.04 near symmetrical 72-4F 1.100...
1974
Sedimentological Sectorization of An Estuarine System In A Regressive Coast, Southeast Brazil
Alex Evaristo Da Silva, Valéria Da Silva Quaresma, Alex Cardoso Bastos
Journal of Sedimentary Research (SEPM)
...; Martins et al. 1997; Bobertz and Harff 2003). Sediment transport vectors can also be derived from main statistical parameters (mean, sorting, and skewness...
2013
Quantitative variability of burrow percentage estimated from 2D views: example from Thalassinoides-bearing strata, central Saudi Arabia
Hassan Abdalla Eltom, Abdullah Mohammed Alqubalee
PALAIOS
... Standard Error Median Standard Deviation Sample Variance Kurtosis Skewness Range Minimum Maximum Coefficient of Variation Confidence Level (95.0%) J-slices...
2022
Physical Characteristics of Fluvial Deposits
Glenn S. Visher
Special Publications of SEPM
... power Simons et al 1965 p 47 The geometry of channel mine the Particles are and shear stress Fair Positive Skewness The lateral bar Clay...
1972
Diagenetic Patterns in the Wettersteinkalk (Ladinian, Middle Trias), Northern Limestone Alps, Bavaria and Tyrol
Klaus Germann
Journal of Sedimentary Research (SEPM)
... distribution is not normal. (b) Nearly all curves are skewed; skewness ranges from +0.28 to -0.61. (c) Many curves are bimodal to polymodal; they show...
1968
The Carolina Cretaceous: Petrographic Reconnaissance of A Graded Shelf
Donald J. P. Swift , S. Duncan Heron, Jr. , Charles E. Dill, Jr.
Journal of Sedimentary Research (SEPM)
... populations is reflected by decreasing skewness. Examination of cumulative and frequency curves reveals much more detailed information, and permits...
1969