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The AAPG/Datapages Combined Publications Database
Showing 3,218 Results. Searched 200,619 documents.
Organic Matter Deformation in Overmature Mudrocks; #51571 (2019)
Guochang Wang
Search and Discovery.com
... is spherical or near spherical with smooth walls • As thermal maturity increases, OM-hosted pores will form and grow larger, causing the pores Sample...
2019
Magnetic Mineral Composition as a Potential Indicator of Depositional Conditions in Gas-Bearing Silurian Shale Rocks from Northern Poland, #51574 (2019).
Dominika Niezabitowska, Rafał Szaniawski, Michael Jackson,
Search and Discovery.com
... in the Jantar it reaches up to 7 percent). Additionally, spherical carbonate concretions in the Pelplin Formation were investigated. The differences...
2019
Cyclic Carbonate Sedimentation in the Mississippian at Moose Dome, Southwest Alberta
L. V. Illing
CSPG Special Publications
... below wave base. Bioclastic lime-sandstones (Pekisko formation) appeared as the seas shallowed, first with interstitial pasty matrix and then clean...
1959
Paleoecology and Environments Inferred for Some Marginal Middle Permian Marine Strata
R. L. Clifton
AAPG Bulletin
..., symmetrical and asymmetrical. Evans, who has recently studied the origin and meaning of ripple marks, states (FOOTNOTE 25) that wave-formed ripple marks should...
1944
Allogenic Quartz and the Origin of Penemosaic Texture in Evaporites of the Detroit River Formation (Middle Devonian) in Northern Indiana
Lawrence F. Rooney, Robert R. French
Journal of Sedimentary Research (SEPM)
... sediments by wave action and density settling. 'Massive replacement of carbonate rock by anhydrite has also been suggested for deposits closely...
1968
Paleoenvironments of an Earliest Cambrian (Tommotian) Shelly Fauna in the Southwestern Great Basin, U.S.A.
Debra A. Gevirtzman, Jeffrey F. Mount
Journal of Sedimentary Research (SEPM)
... wackestones to packstones to grainstones. The peloids are well sorted, spherical to subspherical, and fragmented to whole. They average in length...
1986
Buried and Resurrected Hills of Central Ozarks
C. L. Dake , Josiah Bridge
AAPG Bulletin
..., from the distortion of spherical algae in the Cason shale, that that formation FOOTNOTE 1. Eliot Blackwelder, "The Origin of the Central Kansas Oil...
1932
Oil Exploration Analysis of Recent Carbonate Facies
Hugh J. Mitchell-Tapping
GCAGS Transactions
..., Wave effect on sea grasses in the West Indies: The formation of the bare sand zone: Geological Magazine, v. 112, p. 2-4. Mitchell-Tapping, H.J....
1998
Rock classification in the Eagle Ford Formation through integration of petrophysical, geological, geochemical, and geomechanical characterization
Shahin Amin, Matthew Wehner, Zoya Heidari and Michael M. Tice
AAPG Bulletin
... maps from the lower Eagle Ford core samples. Based on the analysis of x-ray images, quartz and pyrite appear to be more spherical shaped. An aspect...
2021
A New Approach To Quantify the Ordering State of Protodolomite Using XRD, TEM, and Z-Contrast Imaging
Yihang Fang, Huifang Xu
Journal of Sedimentary Research (SEPM)
... voltage with 0.5 mm spherical aberration (Cs) and a point resolution of 0.19 nm at the University of Wisconsin–Madison. Average chemical compositions...
2019
Problems of Plate Tectonics and Continental Drift
Paul S. Wesson
AAPG Special Volumes
...-sectional model. However, because the main input factor is a P-wave data-density correlation derived from studies of the United States Basin-Range...
1974
ABSTRACT: Heavy minerals and trace elements in Yangquan Anthracite from Shanxi Province, China
Chong Tian, Yongchun Zhao, Junying Zhang, Rajender Gupta, Chuguang Zheng
The Society for Organic Petrology (TSOP)
... Both isolated euhedral pyrite presents as individual crystals and a spherical crystal assembly (framboid) are observed in Yangquan anthracite...
2012
Sources of Pleistocene and Holocene Sand for the Northeast Gulf of Mexico Shelf and the Mississippi Fan
Jim Mazzullo, Charles Bates
GCAGS Transactions
..., characterized by spherical quartz grains derived from older strata in the drainage basin of the Mississippi River, and the Eastern Gulf Province...
1985
Sieving Characteristics of Symmetrical Tabular Grains with Any Roundness Value: NOTES
Basanta K. Sahu
Journal of Sedimentary Research (SEPM)
... and roundness values was shown for the following possible (idealized) cases: Case I--Ellipsoidal (spherical) grains with any roundness value, Case IIA...
1965
Surface Production Equipment: Part 9. Production Engineering Methods
James Jennings
AAPG Special Volumes
... (Figure 2), horizontal (Figure 3), and spherical (Figure 4). Horizontal separators are found in both the single tube and double tube design. Advantages...
1992
Effect of Surface Conductance on Drilling-Mud Resistivity: GEOLOGICAL NOTES
Norman Street
AAPG Bulletin
... be strictly true for a dilute suspension of spherical particles, for a concentrated suspension of spheres a more complicated relationship has been...
1956
Sedimentology of the Upper Triassic Charlie Lake, Baldonnel and Pardonet Formations from Outcrop Exposures in the Southern Trutch Region, Northeastern British Columbia
John-Paul Zonneveld, G. Gabriella Carrelli, Cynthia Riediger
CSPG Bulletin
... association 4 (FA4) consists of a heterogeneous succession of solution collapse breccias, rooted, pedogenically-altered mudstone and siltstone, and wave-rippled...
2004
Grouping of Carbonate Rocks Into Textural and Porosity Units for Mapping Purposes
G. E. Thomas
AAPG Special Volumes
... limestones. Oolite: A spherical to ellipsoidal accretionary body which may or may not have a nucleus, and has concentric or radial structure, or both...
1962
Upper Cretaceous Coastal Deposits in South-Central Colorado--Codell and Juana Lopez Members of Carlile Shale
Michael McLane
AAPG Bulletin
... (5YR5/1), very hard, spherical to oblate, septarian, calcareous concretions occurs just above the base of the Codell, and another 1.5 m (5 ft) higher...
1982
Spectral Subdivision of Limestone Types
Robert L. Folk
AAPG Special Volumes
... or wave regimen at the site of deposition, because their mode of accumulation is the same as that of other mechanical sediments. An area of vigorous...
1962
The Structure and Diagenesis of Rhizoliths from Cayman Brac, British West Indies
Brian Jones, Kwok-Choi Ng
Journal of Sedimentary Research (SEPM)
...) isolated calcite rhombs, 3) calcified spherical bodies, 4) Types I and II calcified epilithic and chasmolithic filaments, and 5) grain-coating...
1988
The Use of Nuclear Explosives in Oil and Gas Production1
H. F. Coffer, H. E. Grier, H. H. Aronson
Earth Science Bulletin (WGA)
.... The only major foreseeable problem is the seismic shock wave. This limits the size of explosive which can be used near important surface structures...
1968
Modern Sediment Studies and Ancient Carbonate Environments
F. W. Beales
CSPG Bulletin
... a much greater significance than their sediment contribution. Used informally the term calcisphere can embrace a variety of small spherical structures...
1961
Petrophysical Rock Typing in Organic-Rich Source Rocks Using Well Logs
Alvaro Aranibar, Mehrnoosh Saneifar, Zoya Heidari
Unconventional Resources Technology Conference (URTEC)
... interpretation of well logs and core measurements. We first jointly interpret photoelectric factor, density, neutron porosity, compressional- and shear-wave...
2013
Depositional Environments of the Type Temblor Formation, Chico Martinez Creek, Kern County, California
Jack B. Carter
Pacific Section SEPM
... trough crossstratification and pebble segregation into thin, slightly lenticular beds are common in sediments deposited above wave base (Clifton, 1973...
1985