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The AAPG/Datapages Combined Publications Database
Showing 3,219 Results. Searched 200,626 documents.
Abstract: Sedimentary Features and Depositional Settings of Organic-Rich Shale Facies in the Middle to Upper Ordovician of Northeast Indiana and Northwest Ohio, by Jingqi Xu and Juergen Schieber; #90182 (2013)
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2013
The Curious Case of Hydrocarbon-Expulsion Fractures: Genesis and Impact on the Bakken Shales
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N/A
Three-Dimensional Evolution of Normal Faults in Two Phase Rifting
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The Dielectric Permittivity of Carbonate Formations With Different Porosity Types
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Source Depth Estimation From Gravity Data Over Bihar Mica Belt, India by Continuous Wavelet Transfor
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Re-Evaluation of Bottom-Hole Temperature Corrections: New Insights From Two Hot Wells in West-Central Utah
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Abstract: Fe-Mn Macrooncoids in the Eastern External Subbetic (SE Spain): Evidence for Microbial Mediated Origin
Matías Reolid, Luís M. Nieto, Juan Jiménez-Millán
Search and Discovery.com
... and Tolypammina. Frequent microspheres with spherical to ovoid shapes probably corresponds to microbes. Bacterial and fungal filaments are observed...
2008
Abstract: INTERPRETIVE SEISMIC DATA PROCESSING ON OPI PHASE-III 2003 DATA; #90150 (2012)
Azhar Jamil Siddiqui and Muhammad Haneef
Search and Discovery.com
... of amplitudes using spherical divergence correction. • FK Filtering to remove source-generated noise like Air waves, Ground Role etc. • Surface...
2012
Abstract: Seismic Implications of Moveable Fluids; #90254 (2016)
Robert W. Wiley, Peter Wilson, Scott Peters
Search and Discovery.com
... which included a low-frequency approximation of the effective P-wave in a medium with spherical inclusions. Several studies have been derived from...
2016
Abstract: Geologic Characterization of Enigmatic Carbonate Masses in the Woodford Shale, Criner Hills Area, Oklahoma; #90309 (2017)
Danielle Martin
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... an enigma. Masses range from 24 cm to 1.5 m in diameter and are sub-spherical to oblate or ellipsoidal in shape. Field, petrographic and geochemical...
2017
Abstract: Porosity Destruction Due To Selective Diagenetic Cementation In High-Porosity, Sandstone Reservoir Analogue: Examples From the Crotone Forearc Basin, South Italy; #91210 (2025)
Mattia Pizzati, Anita Torabi, Cristian Cavozzi, Paola Iacumin, Fabrizio Balsamo
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... in length, drop-shaped asymmetric objects and nodular to spherical-shaped bodies. The present-day cementation pattern was imparted by the pervasive...
2025
Analogs of Earth Marbles to Mars Blueberries: Records of Groundwater History from Red Rock to Red Planet; #110028 (2005)
Marjorie A. Chan, Brenda. Beitler, W.T. Parry, Jens Ormö, and Goro Komastu
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... in concretionary forms. Concretions are typically spherical (like marbles) and develop through a selforganizing process. This analog can help explain...
2005
Diagenetic Advective and Diffusive Mass-Transfer Rates of Selective Solutes in Hematite Concretion Formation, by Marjorie A. Chan, William T. Parry, and Anthony Park; #90052 (2006)
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2006
Microbially-Mediated Dolomite Associated with the Oil Shales of the Lacustrine Green River Formation, Green River, Uinta, and Piceance Creek Basins, by Long Ma and Henry S. Chafetz; #90052 (2006)
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2006
Ooids and Grapestone – A Significant Source of Carbonate Mud from Caicos Platform by Noelle Van Ee and Harold R. Wanless, #50163 (2009).
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2009
Outcrop Characteristics for the Woodford Shale, #80200 (2011)
Richard D. Andrews
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... be abundant. Many are nearly perfectly spherical and contain concentric internal banding. The nodule core is typically calcareous. Thin siltstone...
2011
Precambrian Surface (Great Unconformity) in Eastern Midwest; #30441 (2016)
Paul E. Potter
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..., 1942, Settling-velocity and Flume-behavior of Non-spherical Particles: Transactions, American Geophysical Union, v. 23/2, p. 621-633. Martin, L., 1932...
2016
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,
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... in the Jantar it reaches up to 7 percent). Additionally, spherical carbonate concretions in the Pelplin Formation were investigated. The differences...
2019
Model Based Deviated VSP Reservoir Imaging Technique in tough field conditions
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N/A
Distribution of Oceans and Continents--A Suggestion
W. G. Woolnough
AAPG Bulletin
... that of the continental lands, there is still a large excess of water. The same phenomenon can be made more immediately apparent by drawing an antipodal map...
1946
Formation of wedge structures in the permafrost deposits of the Batagay megaslump (Yana Highlands, northeast Siberia)
Yana Tikhonravova, Nikolay Torgovkin, Alexey Lupachev
Journal of Sedimentary Research (SEPM)
... (IAEA/WMO 2024) for Olenek (68.5°N, 112.43°E) with the co-isotopic regression line as δD = 7.87δ18O + 0.22 (R2 = 0.98). Deuterium excess (dexc...
2025
Heavy Minerals in Lower Tertiary Formations in the Santa Cruz Mountains, California
Alexander J. Beveridge
Journal of Sedimentary Research (SEPM)
... well rounded and near-spherical, but the majority of both colorless and pink garnet grains are angular to subangular. Surface etching is a common...
1960
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
Shape and Roundness of Lake Erie Beach Sands
F. J. Pettijohn, A. C. Lundahl
Journal of Sedimentary Research (SEPM)
... abrasion cannot account for the observed trends. Water currents, sorting the sands of the beach in the down-current direction, carry the less spherical...
1943
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