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The AAPG/Datapages Combined Publications Database

Showing 800 Results. Searched 195,502 documents.

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A Textural Study of the Outer Beach of Cape Cod, Massachusetts

Marshall Schalk

Journal of Sedimentary Research (SEPM)

... the curves. Comparison of samples is based on the median diameter and the coefficients of sorting and skewness, following Trask (1). Where Q1 and Q3...

1938

Origin of the Cabo Rojo Beach-Ridge Plain, Veracruz, Mexico

Frank W. Stapor, Jr.

GCAGS Transactions

..., 475 p. Martins, L., 1965, Significance of skewness and kurtosis in environmental interpretation: Jour. Sed. Petrol., v. 35, n. 3, p. 768-770. Mason...

1971

EXTENDED ABSTRACT: Hydrologic Differences Arising from Source Material Differences Between Southwestern Louisiana Aquifers and their Age Equivalents in Southeastern Louisiana

Carlson, Douglas and Milner, Riley

GCAGS Transactions

... will be determined for about 5000 sieved samples, each aquifer has over 400 tests. In general, median, standard deviation, skewness and kurtosis...

2004

Grain-Size Characteristics of Linear Dunes in the Southwestern Kalahari

N. Lancaster

Journal of Sedimentary Research (SEPM)

... the better-sorted end of the range, although the amount of comparative data is very limited. Skewness A wide range of skewness values (SkI...

1986

Textural Differences Between Two Types of Shoestring Sands

John J. W. Rogers, Cyrus Strong

GCAGS Transactions

... of the studied river samples have a "tail" of fine material (fig. 1, curve A), resulting in a positive skewness, though a few appear to have...

1959

The Computerized Particle Size Analyzer: An Exploration Technique, St. Mary Field, Lafayette County, Arkansas

Thomas L. Ham , Raymond P. Bruce

GCAGS Transactions

... Vol. 34 (1984), Grain size frequency and cumulative weight percentages, mean grain size, standard deviation and skewness provide the geologist...

1984

Eolian Components in Cretaceous and Tertiary North Atlantic Sediments

Andrew Lever, I. Nicholas McCave

Journal of Sedimentary Research (SEPM)

... and the mean, standard deviation, and skewness were obtained using Folk and Ward's (1957) graphical methods. Several samples were also examined by scanning...

1983

PHi Mean and Phi Standard Deviation of Grain-size Distribution in Sediments: Method of Moments

Mounir T. Moussa

Journal of Sedimentary Research (SEPM)

... of statistical parameters of grain-size distribution of sediments. The phi mean and phi standard deviation (and also skewness and kurtosis) are computed directly...

1977

The Effects of Sediment Transport on Grain-Size Distributions

Patrick McLaren, Donald Bowles

Journal of Sedimentary Research (SEPM)

..., sorting, and skewness) describing grain-size distributions have long been used to speculate on the direction of sediment transport. We present...

1985

Ascendancy of Continuous Profiles of Grain-Size Distribution for Depositional Environment Studies; #41441 (2014)

Gamal R. Gaafar, M. Mehmet Altunbay, Adriaan Bal, Norfazlina B. Anuar

Search and Discovery.com

...; mean, median, sorting, skewness, kurtosis and the standard deviation. Historically, exhaustive studies of correlations between these features...

2014

Bottom Sediments of Port au Port Bay, Newfoundland

J. I. Shearer

Atlantic Geology

... samples must_ be examined, As well as this type of analysis, the regular statistical parameters of mean, standard deviation, skewness and kurtosis are being...

1967

Shoal-Water Deposits of the Bermuda Banks

Jean P. Todd

Journal of Sedimentary Research (SEPM)

... plotted as cumulative curves, and the median, and Trask's (1932) coefficients of sorting and skewness were determined. These are recorded in Table 1. From...

1939

Phi-millimeter Conversion Table

Harry G. Page

Journal of Sedimentary Research (SEPM)

... of the measures used in mechanical analyses, such as median diameter, quartiles, percentiles, and coefficients of sorting, skewness, and kurtosis...

1955

ABSTRACT: An Estimate of the Minimum Number of Measurements Needed to Constrain the Mean Random Vitrinite Reflectance of Disseminated Organic Matter

Charles E. Barker and Mark J. Pawlewicz

The Society for Organic Petrology (TSOP)

... is to compute the reflectance distribution parameters, mean, variance, kurtosis, and skewness. as the number of reflectance measurements increases. Reflectance...

1992

Comparison of Phi Percentile Deviations

William F. Tanner

Journal of Sedimentary Research (SEPM)

.... or by any other suitable identification. If a sample is unimodal, without skewness, the size distribution generally plots, as is well known, as a straight...

1958

Lithostratigraphy and Petrology of Neogene and Pleistocene Sedimentary Rocks, South-Central Mississippi

Zebao Li , Maurice A. Meylan

GCAGS Transactions

... of the Terrace Deposits are unique in displaying a negative value of skewness. Like the Citronelle, clays of the Terrace Deposits consist of kaolinite...

1994

A Textural Inversion Phenomenon Within Lower Jurassic Red Beds of the Ardon Formation, Makhtesh Ramon, (Israel)

Ron Goldbery

Journal of Sedimentary Research (SEPM)

... sedimentation while the latter is believed to represent a low energy environment of deposition. Negative skewness values (-0.172), together with low...

1979

Tidal Current Ridges in the Southwestern Yellow Sea

Liu Zhenxia, Huang Yichang , Zhang Qinian

Journal of Sedimentary Research (SEPM)

.... Cumulative frequency curves show that the better sorted saltation population of the sands is dominant with 70-95% and has positive skewness (Fig. 4...

1989

A Critique of the "McLaren Method" for Defining Sediment Transport Paths: REPLY

Patrick McLaren, Donald Bowles

Journal of Sedimentary Research (SEPM)

... that there may be inherent relationships between mean grain size, sorting and skewness and therefore our statistical test may be inadequate...

1991

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