Welcome to the new Datapages Archives
Datapages has redesigned the Archives with new features. You can search from the home page or browse content from over 40 publishers and societies. Non-subscribers may now view abstracts on all items before purchasing full text. Please continue to send us your feedback at emailaddress.
AAPG Members: Your membership includes full access to the online archive of the AAPG Bulletin. Please login at Members Only. Access to full text from other collections requires a subscription or pay-per-view document purchase.
Welcome to the new Datapages Archives
Search Results > New Search > Revise Search
The AAPG/Datapages Combined Publications Database
Showing 800 Results. Searched 195,689 documents.
Grain Size Representation by Cm Patterns as a Geological Tool
R. Passega
Journal of Sedimentary Research (SEPM)
... give useful information about the environment. Friedman (1961) showed that mean, standard deviation and skewness permitted a distinction between...
1964
Petrography Of The Upper Cenozoic Non-marine Sediments In The San Pedro Valley, Arizona
Robert S. Gray
Journal of Sedimentary Research (SEPM)
... places have incorporated silt- and clay-size particles. The conventional size parameters, mean, sorting, skewness, and Kurtosis, were calculated...
1967
Aragonite-Cemented Sandstone from Outer Continental Shelf Off Delaware Bay: Submarine Lithification Mechanism Yields Product Resembling Beachrock
Robert C. Allen, Eliezer Gavish , Gerald M. Friedman , John E. Sanders
Journal of Sedimentary Research (SEPM)
... moment) is 0.43, the skewness (3 based on an extrapolated distribution of the minute pan fraction, 0.4 per cent) is 0.00 and the kurtosis (4 computed...
1969
Chapter 6 - Sand & Sandstone Textures
Dana S. Ulmer-Scholle, Peter A. Scholle, Juergen Schieber, Robert J. Raine
AAPG Special Volumes
... variations are statistically described in terms of sediment skewness and kurtosis. The discussion of these topics is well beyond the scope and intent...
2014
Petrology, Provenance and Silica Diagenesis of the Penrith Sandstone (Lower Permian) of Northwest England
Brian Waugh
Journal of Sedimentary Research (SEPM)
... co-efficient of 1.24, skewness of 0.95 and average median grain diameter of 0.41 ram. This value for the median diameter is higher than that usually...
1970
Eocene Conglomerate Sedimentology and Basin Analysis, San Diego and the Southern California Borderland
David G. Howell, Martin H. Link
Journal of Sedimentary Research (SEPM)
..., and quartzitic rocks (Table 1). The skewness in clast composition versus geographic area reflects the different tolerances of these lithologic types...
1979
Hydraulic Interpretation of Grain-size Distributions Using a Physical Model for Bedload Transport
J. S. Bridge
Journal of Sedimentary Research (SEPM)
... deviate from 0.4, as might be expected for very smooth boundaries. Increasing coefficient of variation (and distribution skewness) shifts...
1981
Jointed Source Rock and Fluvial Gravels Controlled by Rosin's Law: A Grain-Size Study in Calabria, South Italy
Hillert Ibbeken
Journal of Sedimentary Research (SEPM)
... fill in the dam embankment acted as a point source of boulders distinguishable downstream, and no definable change in skewness resulted from...
1983
Interactions between the Ebb-Tidal Delta and Landward Shoreline: Price Inlet, South Carolina
Duncan M. Fitzgerald
Journal of Sedimentary Research (SEPM)
... and meandering characteristics of the channel thalweg. The skewness of the ebb-tidal delta changes when accretion along one side of the inlet combines...
1984
Texture as Characteristic of Clastic Deposition
R. Passega
AAPG Bulletin
... is a function of two independent factors. Therefore, parameters such as the coefficients of sorting and skewness which measure attributes...
1957
Sedimentology and Clast Orientations of the 18 May 1980 Southwest-Flank Lahars, Mount St. Helens, Washington
Jon J. Major , Barry Voight
Journal of Sedimentary Research (SEPM)
... (1957). Calculated parameters include mean grain size, deposit sorting, and skewness and kurtosis of the size-distribution curve. Regardless...
1986
Depositional Environments of the Dakota Sandstone and Adjacent Units in the San Juan Basin Utilizing Discriminant Analysis of Trace Elements in Shales
Lester J. Walters, Jr. , Donald E. Owen , Andrea L. Henley , Miriam S. Winsten , Karol W. Valek
Journal of Sedimentary Research (SEPM)
... for the transformed variables. The skewness and kurtosis should be zero if the variables are normally distributed. The Kolomogorov D statistic was used...
1987
Constraints on the Formation of Pliocene Hummocky Cross-stratification in Calabria (Southern Italy) from Consideration of Hydraulic and Dispersive Equivalence, Grain-Flow Theory, and Suspended-Load Fallout Rate
Peter G. DeCelles, William Cavazza
Journal of Sedimentary Research (SEPM)
... in upper left or right comers give skewness. Legend symbols: 1--clast imbrication; 2--trough cross-stratification; 3--horizontal to low-angle lamination...
1992
Sedimentology and Stratigraphy of Tidal Sand Ridges Southwest Florida Inner Shelf
Richard A. Davis, Jr., Jonathan Klay , Pliny Jewell, IV
Journal of Sedimentary Research (SEPM)
..., there is a nearly normal distribution of the sediment (Table 2). The mean grain size, sorting and skewness of the four selected samples are quite...
1993
Gulf Coast Barriers
Francis P. Shepard
AAPG Special Volumes
... similar to the beach sands. Their median diameters are virtually identical except where the beaches have abundant shells. The sorting, skewness...
1960
Dispersal and Petrology of Sandstones of Stanley-Jackfork Boundary, Ouachita Fold Belt, Arkansas and Oklahoma
George DeVries Klein
AAPG Bulletin
... reveal a greater degree of mixing of end-members than is suggested by the petrographic map (Fig. 5). A westward skewness of the northern fan-shaped bodies...
1966
Stratigraphy and Sedimentology of Jackfork Group, Arkansas
Robert C. Morris
AAPG Bulletin
...). They are generally well sorted to moderately well sorted (average standard deviation of 0.76 ^phgr) and have a mean skewness value of +0.23. Common quartz...
1971
Variations in Morphology of Major River Deltas as Functions of Ocean Wave and River Discharge Regimes
L. D. Wright , J. M. Coleman
AAPG Bulletin
... is likely to be skewed, and the downdrift part will have the largest volume. The degree of this skewness, Sk, is indexed by the ratio EQUATION (8...
1973
Ephemeral-Fluvial Deposits: Integrated Outcrop and Simulation Studies Reveal Complexity
Colin P. North , Katy S. Taylor
AAPG Bulletin
... to the large positive skewness in the permeability distributions. To counter this concern we cross-checked the variogram analysis with correlogram analysis...
1996
Measuring and modeling fault density for CO2 storage plume-fault encounter probability estimation
Preston D. Jordan, Curtis M. Oldenburg, Jean-Philippe Nicot
AAPG Bulletin
... deviation, kurtosis, and skewness are 23 m (76 ft), 14 m (48 ft), 1.85, and 1.21, respectively. This indicates that the distribution of contour intervals...
2013
Organic matter pores and oil generation in the Tuscaloosa marine shale
Jiemin Lu, Stephen C. Ruppel, and Harry D. Rowe
AAPG Bulletin
... with far fewer counts below 30 nm. The skewness reflects the fact that smaller pores were not measured. The mode of the OM pore-size distribution falls...
2015
Benchmarking exploration predictions and performance using 20+ yr of drilling results: One company’s experience
Kurt W. Rudolph, and Frank J. Goulding
AAPG Bulletin
..., indicating more normal uncertainty distributions or at least very low skewness. On a speculative basis, this might be because extreme high-side outcomes...
2017
A comparison of three-dimensional–printed porous rocks with nano x-ray computed tomography: Silica sand, gypsum powder, and resin
Lingyun Kong, Mehdi Ostadhassan, Bo Liu, Mohsen Eshraghi, Chunxiao Li, Miguel Navarro, Yihuai Zhang, and Huabin Wei
AAPG Bulletin
... signify the distributions. The pore radius distribution of all three 3-D–printed samples displays a positive skewness, similar to the histogram...
2021
Astronomical forcing of meter-scale organic-rich mudstone–limestone cyclicity in the Eocene Dongying sag, China: Implications for shale reservoir exploration
Jianguo Zhang, Zaixing Jiang, Chao Liang, Timothy F. Baars, Youwei Wang, and Hemmo A. Abels
AAPG Bulletin
...–62.5 µm]) than the other minerals (Figure 6E), and show a weak negative skewness (Figure 6F). Organic matter is also widely seen in this type of laminae...
2022
Forecast of economic gas production in the Marcellus Shale
Wardana Saputra, Wissem Kirati, David Hughes, and Tadeusz W. Patzek
AAPG Bulletin
... that the calculated mean is always higher than the median if we have a positive skewness in the distribution (the heavy tail is on the right-hand side...
2024