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The AAPG/Datapages Combined Publications Database
Showing 800 Results. Searched 196,194 documents.
The Primrose-Kirby Area in the Southern Athabasca, Alberta, Canada: A Detailed Geological Investigation: Section V. Exploration Histories
F. Dekker, C. Visser, P. Dankers
AAPG Special Volumes
... moment statistics: mean, mode, standard deviation, kurtosis, and skewness. For each sample a probability plot is made. Besides the particle-size...
1987
Volcanic Beach Sediments, their Transport, and the Development of Shore Platforms at the Base of the Caldera Wall on the Santorini Islands, Southern Greece
Mauri Pyokari , Kari Yli-Kyyny
Journal of Sedimentary Research (SEPM)
... and poorest in the beach zone on Monolithos Beach. Skewness Sk1 shows a nearly symmetrical distribution, but the mean values for the different shore zones...
1995
Sedimentation and Petrology of Spiro and Foster Sands (Pennsylvanian), McAlester Basin, Oklahoma
David N. Lumsden , Edward D. Pittman , Richard S. Buchanan
AAPG Bulletin
... corresponding to mean grain size, standard deviation, skewness, and kurtosis were calculated (Friedman, 1961). Scatter plots comparing standard deviation...
1971
Bristol Bay: Model Contemporary Graded Shelf
G. D. Sharma , A. S. Naidu , D. W. Hood
AAPG Bulletin
... sediments. End_Page 2004------------------------------ Fig. 8. Variation of sediment skewness in Bristol Bay. Fig. 9. Percentage organic carbon...
1972
Application of Rosin's Distribution in Size-frequency Analysis of Clastic Rocks
Laurence R. Kittleman, Jr.
Journal of Sedimentary Research (SEPM)
... distributed sedimentary materials and described the construction of the graph paper. He showed how terms for skewness and kurtosis may be added...
1964
Zircon Fission-track Thermochronology of the Nojima Fault Zone, Japan
Takahiro Tagami, Masaki Murakami
AAPG Special Volumes
... skewness, showing no signs of appreciable reduction of FT length. In contrast, those from adjacent to the fault at depth show significantly reduced means...
2005
Fluvial Sedimentation Conditioned by Quaternary Climatic Change in Central Texas
Victor R. Baker , Margarida Maria Penteado-Orellana
Journal of Sedimentary Research (SEPM)
.... Modal analysis revealed that all samples, excluding 6B and 4, are multimodal. Skewness, or asymmetry of the cumulative curve, was measured using...
1978
Residual Transport Model in Correlation with Sedimentary Dynamics over an Elongate Tidal Sandbar in the Gironde Estuary (Southwestern France)
Cyril Mallet , Helene L. Howa , Thierry Garlan , Aldo Sottolichio , Pierre Le Hir
Journal of Sedimentary Research (SEPM)
... µ, sorting coefficient , and skewness SK. Comparison of these three parameters from one sampling site with those from a neighboring site allows...
2000
Characteristics of Gravel Bars in Ephemeral Streams
Marwan A. Hassan
Journal of Sedimentary Research (SEPM)
..., and skewness. During the 1970s, a number of studies examined bar morphology and sedimentology on gravel outwash plains (e.g., McDonald and Banerjee 1971...
2005
Sedimentologic and Paleocurrent Study of Mauch Chunk Sandstones (Mississippian), South-Central and Western Pennsylvania
Momin Ul Hoque
AAPG Bulletin
.... Folk, R. L., 1961, Petrology of sedimentary rocks: Austin, Texas, Hemphill's, 154 p. Folk, R. L., 1962, Of skewness and sands: Jour. Sed. Petrology, v...
1968
Fluvial Processes as Interpreted from Ancient and Recent Fluvial Deposits
G. S. Visher
Special Publications of SEPM
... of sedimentation and the significance of the commonly developed positive skewness and bimodality Bernard INTRODUCTION The study of ancient fluvial...
1960
Coastal switching of dominant depositional processes driven by decreasing rates of Holocene sea-level rise along the macrotidal coast of Gochang, SW Korea
Hyun HO Yoon, Woo Hun Ryang, Seung Soo Chun, Alexander R. Simms, Jin Cheul Kim, Tae Soo Chang, Dong-Geun Yoo, Seok-Hwi Hong
Journal of Sedimentary Research (SEPM)
... in the Gochang coast. Fig. 7. Vertical variation of the fraction of sediment content, mean grain size, sorting, and skewness of the columnar section...
2023
Organic geochemical characterization of deltaic Paleogene rock units in Coos Bay, Oregon: Kerogen type and richness in response to depositional environments
Allison K. Barbato, John M. Armentrout, Leslie B. Magoon, Thomas Demchuk, Craig Barrie, and Sophie Warny
AAPG Bulletin
... descriptors such as bimodality, skewness, and kurtosis in combination with an S2 > 0.15 mg HC/g rock. Geologic environments known to create conditions...
2024
Depositional Environments and Sediment Characteristics of the Colville and Adjacent Deltas, Northern Arctic Alaska
A.S. Naidu, T.C. Mowatt
Houston Geological Society
... size (Mz), sorting (δ1), and skewness (Sk1) of sediments from various depositional environments of the North Slope deltas are shown in Figures 3, 4...
1975
Depositional History of the Dakota Sandstone, San Juan Basin Area, New Mexico
Donald E. Owen
Four Corners Geological Society
... upward. A few beds near the top are very well sorted. Skewness is generally positive (fineskewed) throughout, but shows a tendency to increase from near...
1973
Quaternary Stratigraphy and Depositional Environments, Santa Monica Bay, Southern California
Robert H. Osborne, Robert C. Scheidemann Jr., Thomas R. Nardin, Andrew S. Harper
Pacific Section SEPM
... ) . These samples vary in skewness from strongly coarse-skewed (phi skewness = -4.06) to strongly fine-skewed (phi skewness = 1 . 2 7 ) , whereas kurtosis...
1980
New Perspectives On the Geomorphic, Sedimentologic, and Stratigraphic Signatures of Former Wave-dominated Tidal Inlets: Assateague Island, Maryland, U.S.A.
Christopher T. Seminack, Randolph A. McBride
Journal of Sedimentary Research (SEPM)
... generally becomes better sorted upward through the tidal-inlet fill, whereas skewness tends to fluctuate between positive and negative values. Fig. 9...
2019
Depositional Environments Bearpaw-Horseshoe Canyon (Upper Cretaceous) Transition Zone Drumheller "Badlands," Alberta
W. W. Shepheard, L. V. Hills
CSPG Bulletin
.... Petrology, v. 24, no. 2, p. 76-99. Folk, R. L., 1962, of Skewness of sands, Jour. Sed. Petrology, v. 32, no. 1, p. 145-146. Folk, R. L., 1965, Petrology...
1970
Depositional settings and palynofacies assemblages of the Upper Triassic fluvio-deltaic Mungaroo Formation, northern Carnarvon Basin, Western Australia
Joe Scibiorski, Daniel Peyrot, Simon Lang, Tobias H.D. Payenberg, Adam Charles
Journal of Sedimentary Research (SEPM)
.... A skewness parameter of 0.0 ± 0.1 indicates a normal distribution, while a skewness parameter of –0.5 to –1.0 indicates moderate negative skewness...
2020
Recent Carbonate Sedimentation by Tidal Channels in the Lower Florida Keys
Vladimir Jindrich
Journal of Sedimentary Research (SEPM)
... smaller grains. Statistics such as mean size, standard deviation, skewness, and kurtosis were computed according to formulae given by Folk (1965...
1969
Sedimentology of the Lower Strawn Formation, Desmoinesean, Central Texas with Particular Emphasis on Reservoir Quality Rock
Steve Keyes
Abilene Geological Society
..., co-leaders): Guidebook No. 14, Bureau of Economic Geology, Univ. of Texas, p. 1-7. Duane, D.B. (1964) Significance of skewness in recent sediments...
1983
Depositional Environment of the Red Fork and Equivalent Sandstones East of the Nemaha Ridge Kansas and Oklahoma
Adonnis S. Hudson
Oklahoma City Geological Society
... was persistent with little variation in sorting over the fifty foot interval. The third moment measure, skewness, shows consistent fine skewness. Modern...
1973
Genesis and Evolution of A Beach-Ridge Plain Reflecting Relative Sea-Level Rise: A Case Study From Trab El Makhadha Gulf of Gabes, Southeastern Tunisia
Maher Gzam, Noureddine Elmejdoub, Soumaya Boussetta, Younes Jedoui
Journal of Sedimentary Research (SEPM)
... was determined by petrographic observation. Granulometric analysis was carried out, and mean grain size, kurtosis, skewness, and sorting index were...
2014
Distinguishing Depositional Setting For Sandy Deposits In Coastal Landscapes Using Grain Shape
Jordan Blair Reglin Eamer,, Dan Hirsh Shugar,,† Ian James Walker,,‡ Olav B. Lian, Christina M. Neudorf
Journal of Sedimentary Research (SEPM)
... and each sieve fraction was weighed with an electronic balance. Textural parameters (mean, sorting, skewness, and kurtosis) were calculated...
2017
Physical characteristics and distribution of bottom sediments from the Kelantan River Delta towards the South China Sea continental shelf, Malaysia
Nurul Afifah Mohd Radzir, Che Aziz Ali, Kamal Roslan Mohamed
Geological Society of Malaysia (GSM)
... micrometers scale. The results of size grain size analysis were presented in terms of mean, deviation, skewness and kurtosis, as proposed by Folk (1980...
2018