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The AAPG/Datapages Combined Publications Database
Showing 800 Results. Searched 195,596 documents.
Particle-size Distribution in Nearshore Environments
D. L. Inman , T. K. Chamberlain
Journal of Sedimentary Research (SEPM)
..., median diameter, standard deviation measure, and skewness measure. The findings and techniques from the detailed studied area have been used with success...
1953
Dune Sediments: Characteristics, Recognition, and Importance: ABSTRACT
Joao Jose Bigarella
AAPG Bulletin
... dune sand is slightly better sorted than other sediments, sorting is not distinctive. Positive skewness has been considered as an indication of dune...
1969
Sand Leakage around Rocky Headland at Niteroi, Brazil: ABSTRACT
M. D. Emmerling, W. F. Tanner
AAPG Bulletin
... toward the headland (0.370 ± 0.020 to 0.450 ± 0.020); (4) skewness increases from a negative minimum (-0.150 ± 0.020) away from the headland...
1974
A Textural Study of Marine Sediments in a Portion of Cardigan Bay (Wales)
Anthony S. G. Jones
Journal of Sedimentary Research (SEPM)
... that the sign of the skewness is sensitive to the environment. There appears to be a general interrelationship between the form of the bathymetry...
1971
Hydrodynamic Implications of Beach, Beach Ridge and Dune Grain Size Studies
Frank W. Stapor , William F. Tanner
Journal of Sedimentary Research (SEPM)
... largely by swash action. Washover and slip-yface bedding are, in general, not present in beach ridges. Skewness is the most important moment measure...
1975
The Significance and Limitations of Statistical Parameters for Distinguishing Ancient and Modern Sedimentary Environments of the Lower Georgia Coastal Plain
John R. Hails, John H. Hoyt
Journal of Sedimentary Research (SEPM)
... than 90 percent of the Holocene beach sands are negatively skewed, but about 70 percent of the dune sands show positive skewness. The sign of skewness...
1969
Estimation of Recent Sediment Size Parameters from a Triangular Diagram
William J. Plumley, Donald H. Davis
Journal of Sedimentary Research (SEPM)
...-silt-clay composition. A simple analytical procedure exists whereby sediment size parameters of median, mean, deviation measure, and skewness...
1956
Skewness and Kurtosis as Criteria of Normality in Observed Frequency Distributions: NOTES
Thomas A. Jones
Journal of Sedimentary Research (SEPM)
...Skewness and Kurtosis as Criteria of Normality in Observed Frequency Distributions: NOTES Thomas A. Jones 1969 Vol. 39 No. 4. (December), Moment...
1969
Grain Size in Laminae of Beach Sand
K. O. Emery
Journal of Sedimentary Research (SEPM)
... curves. Statistical measures of median diameter, sorting, skewness, and kurtosis may be computed in several ways: the simple quartiles used by Trask...
1978
Analysis of Variance Applied to Measures of Central Tendency and Dispersion in Sediments
Wayne C. Isphording
Journal of Sedimentary Research (SEPM)
... deviation, skewness and kurtosis were calculated using (1) the central moment measure equations, (2) Folk and Ward's equations and (3) Inman's equations...
1972
A Study of Textural Changes in a Beach by Repeated Samplings
Marshall Schalk
Journal of Sedimentary Research (SEPM)
... and low tide medians tends to remain of the same order. To a much lesser degree, the skewness and sorting values tend to change in unison...
1946
Polymodal Composition of Beach Sands from the East Coast of India
A. Chakrabarti
Journal of Sedimentary Research (SEPM)
... graphic standard deviation and inclusive graphic skewness on graphic mean size, determined separately for the different size groups, viz medium sand (1.0...
1977
Dynamic Processes and Statistical Parameters Compared for Size Frequency Distribution of Beach and River Sands
Gerald M. Friedman
Journal of Sedimentary Research (SEPM)
... (<62µ) and coarse-grained (first percentile) tall fractions and various moment and graphical measures, such as Third Moment (skewness), Mean Cubed...
1967
Comparison of the Descriptors of Sediment Grain-size Distributions
Thomas A. Jones
Journal of Sedimentary Research (SEPM)
... because of interpolation of percentiles. More serious is that the graphical statistics are highly interrelated, so varying amounts of skewness...
1970
Estimation of Recent Sediment Size Parameters from a Triangular Diagram
William J. Plumley and Donald H. Davis
Journal of Sedimentary Research (SEPM)
... and sand-silt-clay composition. A simple analytical procedure exists whereby sediment-size parameters of median, mean, deviation measure, and skewness...
1955
Skewness as a Paleoenvironmental Indicator: DISCUSSION
R. R. Jordan, R. N. Benson, N. Spoljaric, T. E. Pickett
Journal of Sedimentary Research (SEPM)
...Skewness as a Paleoenvironmental Indicator: DISCUSSION R. R. Jordan, R. N. Benson, N. Spoljaric, T. E. Pickett 1978 Vol. 48 No. 3. (September...
1978
Textural Analysis with Texas Instruments 59 Programmable Calculator: RESEARCH-METHOD PAPER
D. Joe Benson
Journal of Sedimentary Research (SEPM)
... mean, standard deviation, skewness, and kurtosis. The program is written for use with Texas Instruments, T.I. 59 programmable calculator...
1981
Environmental Analysis of Ancient Sandstone Bodies by Discriminant Analysis: ABSTRACT
R. J. Moiola, Daniel Weiser
AAPG Bulletin
... sedimentologists have demonstrated that certain combinations of textural parameters (e.g., mean diameter vs. skewness; mean diameter vs. standard...
1969
Computerized Particle Size Analyzer--An Exploration Technique, Saint Mary Field, Lafayette County, Arkansas: ABSTRACT
Thomas L. Ham, Raymond P. Bruce
AAPG Bulletin
... 1984 1212 1212 68 9. (September) Grain size frequency and cumulative weight percentages, mean grain size, standard deviation, and skewness provide...
1984
Grain-Size Components As Markers of Origin and Depositional Processes In the Coastal Zone of the Golfe Du Lion (Mediterranean Sea, France)
J. Paul Barusseau, Raphaël Braud
Journal of Sedimentary Research (SEPM)
... by grain-size modal analysis and confirmed by a deconvolution program (LogNormal Deconvolution of Grain Size). Grain-size skewness is related to a much...
2014
Abstracts of Theses: Shallow-Water Ripple Marks at Pinery Park, Lake Huron, Ontario
Risk, M. J.
CSPG Bulletin
... away from shore, but increases with increasing ripple-mark wavelength. Skewness of samples increases away from shore, but decreases with an increase...
1968
Abstract: Permeability Estimation from the Parameters of a Particle-Size Distribution, by M. N. Panda and L. W. Lake; #91012 (1992).
Search and Discovery.com
1992
Abstract: Petrographic Characteristics of Maximum-Transgressive and Regressive Deltaic Sandstones of Upper-Pennsylvanian (Virgilian) Oread Cyclothem, NE Oklahoma, by Lu Zhu and Wan Yang; #90176 (2013)
Search and Discovery.com
2013
Bimodal Composition and Cyclic Characteristics of Beach Sediment in Continuously Changing Profiles
Choule J. Sonu
Journal of Sedimentary Research (SEPM)
..., skewness, and kurtosis. (For necessary mathematics, see Inman, 1952). The composition of the beach material along the Outer Banks of North Carolina...
1972
Grain-Size and Moment Measures: A New Look at Karl Pearson's Ideas on Distributions
Samuel D. Leroy
Journal of Sedimentary Research (SEPM)
... not proven to have an unambiguous significance in sedimentary analysis. The reason for this becomes apparent when one graphs normalized skewness...
1981