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The AAPG/Datapages Combined Publications Database
Showing 800 Results. Searched 195,452 documents.
Abstract: Cataclastic Fault Zones in Nature and Experiments: Impact of Textural Evolution on Petrophysical Properties, by Sankar Muhuri, Eric Flodin, and Martha Gerdes; #90039 (2005)
Search and Discovery.com
2005
Abstract: Experimental Tidal Channel Geometries in Space and Time; #90063 (2007)
Search and Discovery.com
2007
The Sedimentology and Provenance Studies of Stream Sediments from Edunabon Area and its Environs, Southwestern Nigeria, by C. C. Igwe and M. B. Salami; #90037 (2005)
Search and Discovery.com
2005
Graphic Presentation and Statistical Analysis of Sedimentary Data: Part 7. Methods of Study
W. C. Krumbein
AAPG Special Volumes
...------------------------ asymmetry of the figure, and the like. In this manner a fair approximation of the coarseness, degree of sorting, and skewness of the sediments may...
1939
Sediment Texture and Transport Studies in an Intertidal Environment: A Progress Report
Robert W. Dalrymple
Atlantic Geology
... megaripple as mentioned above. Fig. 4. Areal distribution of Fo lk and Ward (1957) grainsize statistics. Sorting, skewness and kurtosis contours...
1973
Sand Leakage Around a Rocky Headland at Niteroi
Michael D. Emmerling, William F. Tanner
GCAGS Transactions
... appears to improve weakly towards the headland (0.370±0.020 to 0.450 ± 0.020). Skewness increases from a negative minimum (-0.150 ± 0.020) away from...
1974
Use of Grain-Size Frequency Data to Interpret the Depositional Environment of the Pliocene Pleshet Formation, Beer Sheva, Israel
Ron Goldbery
Journal of Sedimentary Research (SEPM)
.... Petrology, v. 41, p. 651-670. DUANE, D. B., 1964, Significance of skewness in recent sediments, western Pamlico Sound, N. Carolina: Jour. Sed...
1980
Graphic Presentation and Statistical Analysis of Sedimentary Data
W. C. Krumbein
Special Publications of SEPM
... asymmetry of the figure, and the like. In this manner a fair approximation of the coarseness, degree of sorting, and skewness of the sediments may...
1955
A Modified Logarithmic Probability Graph for the Interpretation of Mechanical Analyses of Sediments
George H. Otto
Journal of Sedimentary Research (SEPM)
... and diameter . [EQUATION] M=phi arithmetic mean diameter. =phi standard deviation. k=phi skewness=Krumbein's 3 or twice his Sk (11, p. 40). =any diameter...
1939
Origin and Age of the Sandstone Reefs of Pernambuco (Northeastern Brazil)
J. M. Mabesoone
Journal of Sedimentary Research (SEPM)
..., the following statistical measures, as introduced by Folk & Ward (1957), have been adopted: mean size, graphic standard deviation (sorting), skewness...
1964
Evaluation of Grain-Size Parameters in Lacustrine Environments
J. T. Solohub, J. E. Klovan
Journal of Sedimentary Research (SEPM)
...]/[6.6] (3) Skewness (SKI) SKI = [16 + 84 - 250]/[2(84 - 16)] + [5 + 95 - 250]/[2(95 - 5)] (4) Kurtosis (KG) KG = [95 - 5]/[2.44 (75 - 25)] where 5...
1970
Lithological and Chemical Facies Changes in the Recent Deltaic Sediments of the Godavari River, India
A. S. Naidu
Houston Geological Society
... river course of the modern Godavari Delta the median and mean size of the sands decrease, sorting increases, skewness changes from negative to positive...
1966
Deep Water Sands and Silts on the Nova Scotian Continental Margin
Dorrik A. V. Stow
Atlantic Geology
... study were from very thick sand units. Fig. 7b is a plot of mean size against skewness. The trend indicated is similar to than shown by recent analyses...
1976
ABSTRACT: Textural Trends in Deposits of Collapsing Turbidity Currents: Sedimentology of Turbidites and Slurry Beds from the Oligocene Flysch of the East Carpathians, Romania; #90007 (2002)
Zoltán Sylvester, Donald R. Lowe
Search and Discovery.com
... skewness SB1 U = ungraded N = normal grading I = inverse grading height above base of bed (cm) 200 ICT? U NCT = normal coarse-tail grading ICT...
Unknown
Grain Analyses of Minerals of Sand Size in Ball Mills
Harold L. Alling
Journal of Sedimentary Research (SEPM)
... dominant. The skewness at the start is close to zero, rapidly increases, then slowly decreases. This characteristic is apparently a transitory...
1944
Petrologic Changes in Fluvial Sediments in the Rio Nautla Drainage Basin, Veracruz, Mexico
Robert P. Self
Journal of Sedimentary Research (SEPM)
..., Skewness and kurtosis in polymodal sediments from the Irish Sea: Jour. Sed. Petrology, v. 42, p. 102-106. FOLK, R. L., AND W. C. WARD, 1957, Brazos...
1975
The Goodness-of-fit to Ideal Gauss and Rosin Distributions: A New Grain-size Parameter
Ruprecht Schleyer
Journal of Sedimentary Research (SEPM)
... additional grain-size parameters. In contrast to the classical grain-size parameters (mean, sorting, skewness, kurtosis, etc.), they characterize...
1987
Grain-size Parameters and Paleoenvironments of the Nubia Sandstone
S. Omara, Wagih W. Bishara, M. Nasr
Journal of Sedimentary Research (SEPM)
... of inclusive graphic skewness against graphic kurtosis gave the best differentiation of samples from beach, dune, and aeolian flat environments. A plot...
1974
Darton Ridge, Pennsylvanian Feature of Wyoming Shelf
Thomas W. Todd
AAPG Bulletin
... deviation, skewness, and normalized kurtosis--were computed for each thin section using the formulas of Folk and Ward (1957). The arithmetic mean (average...
1966
Use of Textural Parameters in Evaluating the Genesis of the Berne Conglomerate (Mississippian) in Central Ohio
Kennard B. Bork
Journal of Sedimentary Research (SEPM)
... Formations (Mississippian) of Ohio: Univ. of Iowa, M.S. thesis (unpub.), 188 p. MARTINS, L. R., 1965, Significance of skewness and kurtosis...
1970
Relationship Between Grain Size Parameter Distribution and Current Patterns in the Gironde Estuary (France)
George P. Allen
Journal of Sedimentary Research (SEPM)
... between the more significant parameters of size, sorting and skewness and the ratio of wave to tidal energy. This is particularly evident in parameter...
1971
Sedimentology of the Mainland Nearshore Region of Santa Barbara Channel, California
Ronald L. Kolpack
CSPG Special Publications
..., England: Fourth International Ocean Disposal Symposium, Abstracts volume, p. 35-37. Kolpack, R. L. 1984. Skewness and kurtosis as a measure of dynamic...
1986
Sediments of Cape Cod Bay, Massachusetts
J. L. Hough
Journal of Sedimentary Research (SEPM)
...), involving the use of first quartile, median and third quartile diameters and the calculation of sorting factor (So. = Q1/Q3) and Skewness (Sk. = Q1...
1942
Significance of Compositional and Textural Properties of South Canadian River Channel Sands, New Mexico, Texas and Oklahoma
Jerome M. Pollack
Journal of Sedimentary Research (SEPM)
... are larger and 50 percent smaller. It is generally preferred to the mean diameter as a measure of central tendency as it is less influenced by skewness...
1961
An Interpretation of Trends in Grain Size Measures
Patrick McLaren
Journal of Sedimentary Research (SEPM)
...An Interpretation of Trends in Grain Size Measures Patrick McLaren 1981 Vol. 51 No. 2. (June), The mean grain size, sorting, and skewness...
1981