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The AAPG/Datapages Combined Publications Database

Showing 800 Results. Searched 195,372 documents.

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Skewness and Kurtosis in Polymodal Sediments from the Irish Sea

D. S. Cronan

Journal of Sedimentary Research (SEPM)

...Skewness and Kurtosis in Polymodal Sediments from the Irish Sea D. S. Cronan 1972 Vol. 42 No. 1. (March), Variations in skewness and kurtosis...

1972

Of Skewnesses and Sands: DISCUSSION

Robert L. Folk

Journal of Sedimentary Research (SEPM)

... provided an excellent method of telling beach from dune sands on Mustang Island, Texas. There the best discriminating parameter was skewness, which averaged...

1962

Simplified Form of the Folk-ward Skewness Parameter

Guyon Warren

Journal of Sedimentary Research (SEPM)

...Simplified Form of the Folk-ward Skewness Parameter Guyon Warren 1974 Vol. 44 No. 1. (March), The Inclusive Graphic Skewness index of Folk and Ward...

1974

Moment and Graphic Size Parameters in the Sediments of Lake Geneva (Switzerland)

J.-M. Jaquet, J.-P. Vernet

Journal of Sedimentary Research (SEPM)

... and comprises a significant amount of precipitated silt-size calcite. Comparison of parameters shows that mean, sorting, and skewness may be estimated...

1976

Significance of Skewness and Kurtosis in Environmental Interpretation: NOTES

Luiz R. Martins

Journal of Sedimentary Research (SEPM)

...Significance of Skewness and Kurtosis in Environmental Interpretation: NOTES Luiz R. Martins 1965 Vol. 35 No. 3. (September), Diverse opinions exist...

1965

Practical Comparison of Methods of Computing Grain-Size Parameters: ABSTRACT

Donald E. Owen, Roy L. Ingram

AAPG Bulletin

... variation existed in computation of mean, sorting, skewness, and kurtosis. As a group, Folk and Ward's parameters came closest to approximating moment...

1969

Significance Of Skewness In Recent Sediments, Western Pamlico Sound, North Carolina

David B. Duane

Journal of Sedimentary Research (SEPM)

...Significance Of Skewness In Recent Sediments, Western Pamlico Sound, North Carolina David B. Duane 1964 Vol. 34 No. 4. (December), Application...

1964

Measures for Describing the Size Distribution of Sediments

Douglas L. Inman

Journal of Sedimentary Research (SEPM)

... size-frequency curve of a sediment. They include the mean (or median) diameter, standard deviation, kurtosis, and two measures of skewness, the second...

1952

Textural Parameters: AN EVALUATION

R. J. Moiola, D. Weiser

Journal of Sedimentary Research (SEPM)

... deviation, skewness, kurtosis) calculated from a total of 120 samples of modern beach, coastal dune, inland dune, and river sands demonstrates...

1968

Distinction Between Dune, Beach, and River Sands from their Textural Characteristics

Gerald M. Friedman

Journal of Sedimentary Research (SEPM)

... be numerically stated by computing the third moment (skewness) of the distribution curve. On the phi scale the third moment (skewness) for dune sands...

1961

Skewness as a Paleoenvironmental Indicator

Hardarshan S. Valia, Barry Cameron

Journal of Sedimentary Research (SEPM)

...Skewness as a Paleoenvironmental Indicator Hardarshan S. Valia, Barry Cameron 1977 Vol. 47 No. 2. (June), Because it has been suggested by many...

1977

Shoreline, Grain-Size, and Total-Carbon Distribution Changes Before and After Hurricane Alicia, Galveston Island, Texas, 1983: ABSTRACT

Christine M. Rothammer, Lowell R. Morrison, Steven L. Warkentin

AAPG Bulletin

... well-defined times of either no correlation or strong correlation between total carbon vs. mean grain size, skewness vs. mean grain size, kurtosis vs...

1985

A Profile of the Four Moment Measures Perpendicular to a Shore Line, South Haven, Michigan

William T. Fox, John W. Ladd, Michael K. Martin

Journal of Sedimentary Research (SEPM)

... zone and were also high on the offshore bar. Skewness and kurtosis values were highest in the nearshore and offshore area. The beach represents a phi...

1966

Recognizing Fossil Strand Lines From Grain-size Analysis: DISCUSSION

Anil Lyall, James Shearer

Journal of Sedimentary Research (SEPM)

... to differentiate beach and dune sands on the basis of skewness values. He has presented many diagrams to show the variations in the skewness values...

1969

A Grain Size Analysis of Longshore-Bars and Troughs, Lake Superior, Ontario

John S. Mothersill

Journal of Sedimentary Research (SEPM)

... skewness. This would suggest that the longshore-troughs were formed by the action of breaking waves that preferentially set the finer grained particles...

1969

Recognizing Fossil Strand Lines From Grain-size Analysis

John Chappell

Journal of Sedimentary Research (SEPM)

... for computing skewness of distributions which are mixtures of two or more normal populations. Beach and dune sands are often characterized by skewed...

1967

Differentiation of Beach, Dune, and Aeolian Flat Environments by Size Analysis, Mustang Island, Texas

Curtis C. Mason, Robert L. Folk

Journal of Sedimentary Research (SEPM)

... be readily distinguished by size analysis. The best means of differentiating them is by plotting skewness versus kurtosis inasmuch as the geologic processes...

1958

Note on the Texture of Some Pleistocene Sands: NOTES

Robert N. Schock

Journal of Sedimentary Research (SEPM)

... and beach sands from the residual berm. The sands were sieved using phi interval screens. The mean, standard deviation, skewness, and kurtosis were...

1965

First and Second Degree Regression Correlation of the Size Analysis Statistical Parameters of Trask, Inman, Folk and Ward, and Friedman: NOTES

W. D. Sevon

Journal of Sedimentary Research (SEPM)

... the results of a first and second degree regression correlation of the parameters of mean, standard deviation (sorting), skewness, and kurtosis...

1968

Skewness as a Paleoenvironmental Indicator: REPLY

Hardarshan S. Valia, Barry Cameron

Journal of Sedimentary Research (SEPM)

...Skewness as a Paleoenvironmental Indicator: REPLY Hardarshan S. Valia, Barry Cameron 1978 Vol. 48 No. 3. (September), FOLK, R. L., 1974, Petrology...

1978

Comparison of Moment Measures for Sieving and Thin-Section Data in Sedimentary Petrological Studies

Gerald M. Friedman

Journal of Sedimentary Research (SEPM)

...-section analyses. For higher moments (skewness and kurtosis) the correlation between sieving and thin-section data is not very significant...

1962

Skew Normal Distribution Deconvolution of Grain-size Distribution and Its Application To 530 Samples from Lake Bosumtwi, Ghana

Stoney Q. Gan, Christopher A. Scholz

Journal of Sedimentary Research (SEPM)

..., but its symmetric property makes it incapable of describing the distribution skewness that is commonly seen in the GSD of clastic sediments. This study...

2017

Kapteyn's Transformation of Grain Size Distribution

Jiri Brezina

Journal of Sedimentary Research (SEPM)

... of settling velocity. The resulting distributions are characterized, depending upon mean grain size and sorting, by a definite negative phi skewness; from...

1963

Brazos River Bar: A Study in the Significance of Grain Size Parameters

Robert L. Folk, William C. Ward

Journal of Sedimentary Research (SEPM)

... a more detailed coverage of non-normal size curves. Unimodal sediments have nearly normal curves as defined by their skewness and kurtosis. Non-normal...

1957

Abstracts: Grain Size Variations Inn the Beach Sands of Long Point Lake Erie

Terence Roger Watts

CSPG Bulletin

... of parameters on the beach. The sands were generally characterised by a narrow range of sizes, fairly good sorting, negative skewness and leptokurtosis...

1965

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