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The AAPG/Datapages Combined Publications Database

Showing 800 Results. Searched 195,502 documents.

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Mercury and Bed Sediment in the Ottawa River, Canada

Brian R. Rust, Dennis G. Waslenchuk

Journal of Sedimentary Research (SEPM)

...). Grain Size Grain size distributions determined by sieve and pipette analysis were expressed as graphic mean size, standard deviation and skewness...

1976

Textural and Mineralogical Characteristics of the Surficial Sediments of Kane Basin

Joseph H. Kravitz

Journal of Sedimentary Research (SEPM)

..., standard deviation, skewness, and kurtosis, were determined by moment computation. Correlation coefficients were used to compare depth and standard...

1976

Carbonate Facies and Sedimentation of Patch Reefs off Bermuda

Clifton F. Jordan, Jr.

AAPG Bulletin

...., 1964, Significance of skewness in recent sediments, western Pamlico Sound, North Carolina: Jour. Sed. Petrology, v. 34, no. 4, p. 864-874. Emery, K...

1973

Surficial Deposits of the Deserts of Syria, Trans-Jordan, Iraq and Western Iran

E. C. DAPPLES

Journal of Sedimentary Research (SEPM)

... irrespective of the kind of rock or the size of the minerals constituting the rock. The phi-quartile skewness (Skq) for limestones hich have been...

1941

Carbonate Sediments in the Capricorn Reef Complex, Great Barrier Reef, Australia

W. R. Maiklem

Journal of Sedimentary Research (SEPM)

... (figs. 4, 6, 8) have been constructed for all samples and four statistical parameters, mean (MZ), dispersion (I), skewness (SkI), and kurtosis (KG...

1970

Plotting Equation for Gaussian Percentiles and a Spreadsheet Program for Generating Probability Plots: RESEARCH METHODS PAPERS

James H. Balsillie, Joseph F. Donoghue, Kenji M. Butler, Jennifer L. Koch

Journal of Sedimentary Research (SEPM)

..., standard deviation, skewness, kurtosis), grain-size distribution diagrams, and frequency and cumulative frequency probability plots. Probability...

2002

The concept of joint saturation and its application

Yunhui Tan, Thomas Johnston, and Terry Engelder

AAPG Bulletin

... the rock, skewness of the joint-spacing histogram decreases from the extreme represented by an exponential distribution. To express joint-spacing...

2014

Sedimentation of Beach Gravels: Examples from South Wales

Brian J. Bluck

Journal of Sedimentary Research (SEPM)

... deviation and skewness are, to a considerable extent, effected by either the removal from, or addition of small coarse modes to large fine. Size frequency...

1967

COMPARISON OF TEXTURES AND STRUCTURES TO DISTINGUISH EOLIAN ENVIRONMENTS, KILLPECKER DUNE FIELD, WYOMING

Thomas S. Ahlbrandt

Rocky Mountain Association of Geologists

... r a i n s i z e downwind i n such a sequence. Skewness and k u r t o s i s values have q u e s t i o n a b l e use, t h e f o r mer being dependent...

1975

Morphology and Sediments of Sand Waves in the St. Lawrence Estuary

David Monahan

Atlantic Geology

... in skewness towards the crest of wave 2. These trends are not strong enough to permit any definite conclusions to be reached. FIG. Strong trends...

1976

Sedimentology of Some Mexican Coastal Lagoons

Fred B. Phleger, Gifford C. Ewing

Tulsa Geological Society

... and there are brine pans and salt flats beyond the head of the lagoon. The dominant type of sediment is fine, well-sorted sand showing little skewness...

1959

Notes on the Mineral Assemblage of the "White Silt" Terraces in the Okanagan Valley, British Columbia

Charles Meyer, Keith Yenne

Journal of Sedimentary Research (SEPM)

... of the thickly bedded material, and to a lesser extent also that of the laminated silt, shows a skewness comparable to that determined for loess but the genetic...

1940

Preface

Parker D. Trask

Special Publications of SEPM

..., and chemical properties of the sediments should be obtained. Such studies, however, would involve subsidiary problems such as causes of sorting, skewness...

1955

Trends of Sedimentation in Giridih Basin, Bihar, India

C. Narasimha Rao

Journal of Sedimentary Research (SEPM)

... skewness (Sk), a rarely used attribute, was determined for both the stages. Even though its full significance is yet to be understood, it certainly...

1957

Mechanical Analysis and Heavy Minerals, Morrison and Cloverly Formations, Southern Big Horn Mountains, Wyoming

Arthur Mirsky

Journal of Sedimentary Research (SEPM)

... skewness and the kurtosis measures, were also analyzed. The graphs of the phi skewness measure show no definable relations within either the Morrison...

1961

Louisiana Cheniers: Settling from High Water

William F. Tanner

GCAGS Transactions

... for a mature dune or a mature beach. The skewness is a borderline value, at best. The kurtosis and the sixth moment measure identify a combination...

1993

Sieve Calibration: NOTES

Dean A. McManus

Journal of Sedimentary Research (SEPM)

... measures due to manufacturing tolerances of the sieves. The range of values was: mean, 0.1d; standard deviation, 0.05 phi-unit; skewness, 0.3 and kurtosis...

1963

Some Remarks on the Phi Notation: NOTES

W. C. Krumbein

Journal of Sedimentary Research (SEPM)

..., phi standard deviation, and phi skewness from cumulative curves drawn on probability paper. Otto's work was extended by Inman (1952) to a convenient...

1964

Transformation of Weight--and Number--Frequencies for Phi-Normal Size Distributions: NOTES

Basanta K. SAHU

Journal of Sedimentary Research (SEPM)

... of phi-skewness increases, the departures from equations 9, 12, and 10 become greater. This is probably the most important cause of the discrepancy...

1965

The Use of Factor Analysis in Determining Depositional Environments from Grain-Size Distributions

J. E. Klovan

Journal of Sedimentary Research (SEPM)

... dealing with ancient sediments. DUANE, D. B., 1964, Significance of skewness in recent sediments, Western Pamlico Sound, North Carolina: Jour. Sedimentary...

1966

Factors Affecting the Lithification of Eolianite and Interpretation of its Environmental Significance in the Coastal Plain of Israel

D. H. Yaalon

Journal of Sedimentary Research (SEPM)

... samples have a coarser central part and tail (negative skewness) and the uncemented particles have a larger central part and tail towards the finer...

1967

Volumetric Histogram for Field Study of Carbonate Sediments: NOTES

Donald E. Hattin

Journal of Sedimentary Research (SEPM)

... is a simple method of ensuring that each student will learn something of such parameters as modal size, sorting, and skewness by examining the sediment-laden...

1968

Granulometer--A Sediment Analyzer Directly Writing Grain Size Distribution Curves: NOTES

Jiri Brezina

Journal of Sedimentary Research (SEPM)

... in volumetric methods). Chappel (1967) shows that the skewing effect criticized by Folk is due, for the most part, to the skewness formula used. Having...

1969

Automatic Grain Size Analyses by Means of Electro-Magnetic Surface Measurements

J. C. Deelman

Journal of Sedimentary Research (SEPM)

... properties (as, for example, quartile measures, median diameter, degree of sorting, sorting coefficient, skewness, geometric standard deviation, etc...

1972

Textural Changes as an Indicator of Sediment Dispersion in the Northeastern Channel Island Passages, California

James S. Booth

Journal of Sedimentary Research (SEPM)

..., as interpreted from skewness and kurtosis values showing mixed populations (Folk and Ward, 1957; F lk, 1966), it is concluded that the vast majority...

1973

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