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The AAPG/Datapages Combined Publications Database
Showing 800 Results. Searched 195,387 documents.
Textural Trends of Recent Sediments from River to Abyssal Plain off Oregon: ABSTRACT
John V. Byrne, L. D. Kulm, Neil J. Maloney
AAPG Bulletin
..., and sorting becomes poorer. Skewness is negative for the inner-shelf sediments, positive for the deposits of the outer shelf and continental slope...
1966
Statistical Properties of Dunes Generated by Undirectional Water Currents: ABSTRACT
Carl F. Nordin, Jr., James K. Culbertson
AAPG Bulletin
... are skewed, and the skewness correlates roughly with flow intensity. This analysis gives useful indications of the variations in the geometric properties...
1967
Texture of Modern Deltaic Sediments of Godavari River (India): ABSTRACT
A. S. Naidu
AAPG Bulletin
... sands are well sorted and slightly positively skewed. In contrast, the barrier sands are very well sorted and the skewness curve is nearly symmetrical...
1969
Sediment Dispersion in Northern Channel Island Passages, California: ABSTRACT
James S. Booth
AAPG Bulletin
... synthesized by an IBM 360 computer, which constructed 5th-degree trend surface maps for the mean, sorting, skewness, and kurtosis values for each...
1970
Synoptic Surf-Zone Sedimentation Patterns: ABSTRACT
Benno M. Brenninkmeyer
AAPG Bulletin
... is coarser on the ebb than on the flood. Except when the tidal inequality is small, skewness of the sand becomes negative on the ebb and positive...
1973
Significant Properties of Sandstones--Aids to Exploration and Exploitation: ABSTRACT
W. R. Walton
AAPG Bulletin
... characteristics and patterns of logs become more useful when related to depositional history. Parameters such as sorting, skewness, roundness...
1973
Anomalous Beach Ridges of Sangamon (?) Age: ABSTRACT
W. F. Von Drehle
AAPG Bulletin
... of the ridges. Average-mean grain size and standard deviation decrease upward as skewness and kurtosis increase, a trend observed in profiles taken up the beach...
1973
Regional Variations in Development and Characteristics of Barrier Island Foredunes Along Texas Coast: ABSTRACT
Karen P. Smith
AAPG Bulletin
... from one another by mean standard deviations, skewness values, and carbonate content. Variations in dune geometry and size are controlled by climate...
1983
Organic geochemical characterization of Deltaic Paleogene Rock units in Coos Bay, Oregon: Kerogen type and richness in response to depositional environments
Allison K. Barbato , John M. Armentrout , Leslie B. Magoon , Thomas Demchuk , Craig Barrie , and Sophie Warny
AAPG Bulletin
... of Tmax. This involves evaluating S2 peak morphology using statistical descriptors such as bimodality, skewness, and kurtosis in combination with an S2...
2024
An Appraisal of the Significance of Sieve Intervals in Grain Size Analysis for Environmental Interpretation
John R. Hails, Barry Seward Thompson, Lynne Cummings
Journal of Sedimentary Research (SEPM)
... and implication but to determine whether or not significantly different results are obtained for the estimates of mean, standard deviation, skewness...
1973
Further Comparisons of Grain Size Distributions Determined by Electronic Particle Counting and Pipette Techniques
E. William Behrens
Journal of Sedimentary Research (SEPM)
.... It also entirely accounts for lower standard deviations produced by particle counting. Differences between moment skewness and kurtosis values...
1978
LOWER TYLER OF CENTRAL MONTANA: MARINE OR NON-MARINE?
W. W. BALLARD
Montana Geological Society
... the non-marine interpretation. Skewness, kurtosis and sorting values computed from grain size studies (mechanical analyses, thin section...
1964
Distinguishing between Beach and Dune Sands
Francis P. Shepard, Ruth Young
Journal of Sedimentary Research (SEPM)
... the sorting, skewness, and kurtosis (Mason and Folk, 1958). These factors have been checked between beach and dune samples in the present study from...
1961
A Sample Splitter for Moist, Saturated, or Suspended Sediment: NOTES
Dean A. Mcmanus, Larry G. Hanson, James V. Baker
Journal of Sedimentary Research (SEPM)
... the splits. Comparison of the median particle size among the splits reveals little variation, and, although the mean, standard deviation and skewness show more...
1966
Beach Foreshore Sedimentology and Morphology in the Apostle Islands of Northern Wisconsin
Wayne N. Engstrom
Journal of Sedimentary Research (SEPM)
..., Significance of skewness and kurtosis in environmental interpretation: Jour. Sed. Petrology, v. 35, p. 768-770. MASON, C. C., AND FOLK, R. L., 1958...
1974
Grain-Size Distributions, an Aid in Facies Identification
R. P. Glaister, H. W. Nelson
CSPG Bulletin
... calculations of mean, standard deviation, skewness and kurtosis. Recent papers by Folk and Ward (1957), Mason and Folk (1958), Friedman (1961) and Duane...
1974
Particle-Size Distribution in Nearshore Sediments
D. L. Inman, T. K. Chamberlain
Special Publications of SEPM
... diameter, a measure of sorting (deviation), and a measure of skewness. The findings and techniques from the control area which was studied in detail were...
1955
PALEOENVIRONMENTAL APPROACH TO OIL EXPLORATION
W. W. BALLARD
Williston Basin Symposium
... decrease, quality of sorting becomes better. Skewness is a measure of asymmetry of a distribution. The sign of skewness value...
1964
A Comparison of Three Sieve Shakers
Ada Swineford, Frances Swineford
Journal of Sedimentary Research (SEPM)
... (M), phi standard deviation (), and phi skewness (Sk) in Table 1.(FOOTNOTE *) The phi statistics rather than the amount of material passing through...
1946
Grain Size Parameters For Sandy-Gravels
K. R. Dyer
Journal of Sedimentary Research (SEPM)
... deviation, skewness and kurtosis parameters based on the 16th, 50th and 84th percentiles, using phi units. These were extended by Folk and Ward (1957...
1970
Longshore Variation in Beach Sands Nautla Area, Veracruz, Mexico
Robert P. Self
Journal of Sedimentary Research (SEPM)
..., sorting, and skewness in foreshore beach sands of the Nautla area, Veracruz, Mexico suggest sorting and dispersion by seasonally reversing longshore...
1977
Assessing Intra-Bar Variations in Grain Roughness Using Close-Range Photogrammetry
Jane Groom, Stéphane Bertin, Heide Friedrich
Journal of Sedimentary Research (SEPM)
... in the Whakatiwai River, New Zealand. An extensive range of roughness parameters are used, including the standard deviation of elevations, skewness...
2018
Deep-Sea Bottom-Currents Differentiated from Texture of Underlying Sediment
Christopher R. Blaeser, Michael T. Ledbetter
Journal of Sedimentary Research (SEPM)
... on a fourth-degree correlation matrix of different parameters to draw inferences about the main factors controlling skewness and hence inferred velocity...
1982
Environments of Deposition of the Halfway Formation, Milligan Creek Area, British Columbia
John S. Mothersill
CSPG Bulletin
... in the Milligan Creek Oilfield, British Columbia: Alberta Soc. Petroleum Geologists Jour., v. 9, p. 109-130. Duane, D. B., 1964, Significance of skewness...
1968
Gravels of Alameda Creek, California
Anton L. Inderbitzen
Journal of Sedimentary Research (SEPM)
..., frequencies. Sorting coefficient values and skewness values were determined by the formulas found in Pettijohn (1957, p. 26) which are: Sorting Coefficient...
1959