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 3,218 Results. Searched 200,619 documents.
An Automated Grain-shape Classifier
William H. Glezen, John C. Ludwick
Journal of Sedimentary Research (SEPM)
... coarse sand grains into three shape classes: spherical, intermediate, and tabular. Six samples of 1500 grains each can be classified in 2.5 hours...
1963
Geology of Sediment Cores from the George V Continental Margin, Antarctica
M. A. Hampton, J. H. Kravitz, G. Luepke
Circum Pacific Council Publications
... of 3 5 ppt for s e a water. Water content is reported as a percentage of dry sediment weight; therefore, values in excess of 1 0 0 % are possible. Grain...
1987
Mantle Creep: Elasticoviscous Versus Modified Lomnitz Law, and Problems of "The New Global Tectonics"
Paul S. Wesson
AAPG Bulletin
..., the material is near its yield point and there is a great excess of vacancies generated by dislocation intersection. The average vacancy concentration...
1972
Diagenesis Through Coupled Processes: Modeling Approach, Self-Organization, and Implications for Exploration
W. Chen, A. Ghaith, A. Park, P. Ortoleva
AAPG Special Volumes
... spherical. Hence [EQUATION (5)] for the effective grain radius Ri. If the rock has high porosity, one might assume that most of the grain surface area (4R...
1990
Sphericity Determinations of Pebbles and Sand Grains
Willard D. Pye, Margaret Hurst Pye
Journal of Sedimentary Research (SEPM)
... and sand grains is simply and rapidly determined by taking ratios of the diameters of the particles. It is proved that for ellipsoidal and spherical shaped...
1943
Heterogeneous Distribution of Calcite Cement at the Outcrop Scale in Tertiary Sandstones, Northern Apennines, Italy
Earle F. McBride , Kitty L. Milliken , William Cavazza , Ubaldo Cibin , Daniela Fontana , M. Dane Picard , Gian Gaspare Zuffa
AAPG Bulletin
... localized hydrologic factors in determining the spatial distribution of authigenic pore-filling calcite. Spherical concretions grew by diffusive supply...
1995
Enhanced Two Dimensional Grain Size Analysis through the Use of Calibrated Digital Petrography, #41461 (2014).
O. Hinds, R.A. Duller, R.P. Walker, B.T. Wells, R.H. Worden
Search and Discovery.com
... the effect of size distribution and shape variation error. Three samples were made from: sample a; unimodal glass beads with spherical shape (Figure 1a...
2014
The Great Salt Lake - an Overview
Robert E. Cohenour
Utah Geological Association
.... The sudden onset of warm weather causes rapid production of meltwater in excess of the ground-water intake capacity. Such a condition of high runoff occurring...
1987
Estimation of original kerogen type and hydrogen index using inorganic geochemical proxies: Implications for assessing shale gas potential in the Devonian Horn River Formation of western Canada
Sung Kyung Hong, Young Jae Shinn, Jiyoung Choi, and Hyun Suk Lee
AAPG Bulletin
... 2). The ellipsoid-shaped radiolarian tests with spherical entactiniid radiolarian tests are preserved in the siliceous and calcareous shales (Ross and Bustin, 20...
2018
Determination of Drag Coefficients in Measuring Particle Diameters
Weinan Chen
Journal of Sedimentary Research (SEPM)
... for estimating the contact area between a particle and the fluid, which is critical in calculating the nondimensional drag coefficient (CD). When a spherical...
2003
A model for fibrous illite nucleation and growth in sandstones
Robert H. Lander, Linda M. Bonnell
AAPG Bulletin
... perpendicular to the a axis, and Tc is the crystallite thickness along the c* axis. As the crystal grows, the model keeps track of excess thickness...
2010
Cave Pearls and Pisoliths: A Sedimentological Comparison
Carol A. Hill
West Texas Geological Society
... Cave, Guadalupe Mountains, New Mexico (Nymeyer, 1938). Shape is typically spheroidal for both pisoliths and cave pearls, but can vary from spherical...
1992
Practical Significance of Birdseye Structures in Carbonate Rocks
E. A. Shinn
Journal of Sedimentary Research (SEPM)
.... Birdseye vugs, shown in figure 7, formed both under the heat lamp and outdoors under the sun. Both spherical and planar types, similar to those described...
1968
The Chemistry of Eolian Quartz Dust and the Origin of Chert
C. Blaine Cecil, Bruce S. Hemingway, Frank T. Dulong
Journal of Sedimentary Research (SEPM)
... spherical particle but twenty-seven percent of a 1 μm spherical particle. Although angular clay-size quartz particles ≤ 1 μm will consist...
2018
Secondary gas emissions during coal desorption, Marathon Grassim Oskolkoff-1 Well, Cook Inlet Basin, Alaska: implications for resource assessment
Charles E. Barker, Todd Dallegge
CSPG Bulletin
... several morphological types of microbes, including rod, cocci and spherical forms attached to the coal surface. These microbes apparently represent...
2006
Biological Pumping Upwards of the Coarse Fraction of Deep-Sea Sediments
I. N. McCave
Journal of Sedimentary Research (SEPM)
... and particulate excess 210Pb, organic carbon and CaCO3 in surface sediments of the deep equatorial Pacific: Earth Planet. Sci. Lett., v. 77, p. 59-69...
1988
Estimation of In-Situ Wettability using Multi-Frequency Electromagnetic Measurements
Yuteng Jin, Siddharth Misra, Dean Homan
Unconventional Resources Technology Conference (URTEC)
... and nonconductive phase on the surface of a spherical particle. The wetting phase will try to surround the solid particle to satisfy the contact angle...
2020
Volcanic effects on microplankton during the Permian Triassic Transition (Shangsi and Xinmin, South China)
Jun Shen, Yong Lei, Thomas J. Algeo, Qinglai Feng, Thomas Servais, Jianxin Yu, Lian Zhou
PALAIOS
... but acritarchs reached their peak abundance, confirming their role as a disaster taxon. Above the LPME, long-spined and small spherical acritarchs...
2013
Deposit Structure and Processes of Sand Deposition from Decelerating Sediment Suspensions
Esther J. Sumner, Lawrence A. Amy, Peter J. Talling
Journal of Sedimentary Research (SEPM)
... layers (laminar sheared layers) were an important mechanism by which the bed aggraded beneath these unsteady flows. At bed aggradation rates in excess...
2008
Sea level and vertical motion of continents from dynamic earth models since the Late Cretaceous
Sonja Spasojevic, Michael Gurnis
AAPG Bulletin
... in spherical shell models of mantle convection: Journal of Geophysical Research, v. 105, no. B5, p. 1106311082, doi:10.1029/2000JB900003.Zhong, S. J...
2012
The Influence of Plants and Micro-Organisms on Diagenesis in Caliche: Example from the Pleistocene Ironshore Formation on Cayman Brac, British West Indies
Brian Jones
CSPG Bulletin
... and spherical bodies ((Fig. 7D-F)), and (4) calcified hemispherical and spherical bodies ((Fig. 7A-C)). UNCALCIFIED FILAMENTS The uncalcified filaments...
1988
Scanning Electron Microscope Petrographic Differentiation among Different Types of Pores Associated with Organic Matter in Mudrocks
Robert M. Reed, Robert G. Loucks, Lucy T. Ko
GCAGS Journal
...). These pores can be highly variable in size (nanometers to micrometers) and shape (spherical to cubic to highly irregular). Inherited pores occur...
2020
Recognition of Sandstone Depositional Environment: A Grain Shape Approach, with an Example from North Padre Island
Jim Mazzullo , Donald Sims
GCAGS Transactions
... that spherical sand grains have a strong tendency to move under the influence of the wind, while less spherical grains tend to lag behind. Mattox (1955), however...
1983
Frontmatter: TOC, Road Logs, Back pocket Maps, West Texas Geological Society Guidebook: Delaware Basin Exploration
Karl W. Klement, Ed H. McGlasson, Kenneth O. Seewald, W. N. McAnulty, David V. LeMone, William S. Strain
West Texas Geological Society
.... As a continuing result of this success there were 8 wildcats drilling to projected depths in excess of 20,000 feet in August 1968. There were 20 field wells...
1968
CO2–Mineral Reaction in a Natural Analogue for CO2 Storage—Implications for Modeling
Mark Wilkinson, R. Stuart Haszeldine, Anthony E. Fallick, Nicolas Odling, Susan J. Stoker, Robert W. Gatliff
Journal of Sedimentary Research (SEPM)
..., within the resolution of our methods. Figure 5. XRD trace of clay-size fraction (< 2 μm equivalent spherical diameter) showing the 110 dawsonite peak...
2009