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The AAPG/Datapages Combined Publications Database
Showing 3,149 Results. Searched 197,286 documents.
The Dielectric Permittivity of Carbonate Formations With Different Porosity Types
Search and Discovery.com
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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
Search and Discovery.com
... 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
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
Search and Discovery.com
... 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
Search and Discovery.com
... 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
Search and Discovery.com
..., 1942, Settling-velocity and Flume-behavior of Non-spherical Particles: Transactions, American Geophysical Union, v. 23/2, p. 621-633. Martin, L., 1932...
2016
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
Model Based Deviated VSP Reservoir Imaging Technique in tough field conditions
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N/A
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
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
Abstract: Microbialites in Zechstein Cycle 2 Carbonates (NE England and Poland): Types and Source Rock Perspectives; #90153 (2012)
Mirosław Słowakiewicz and Maurice E. Tucker
Search and Discovery.com
... that appear peaked or rounded in cross-section. They display the same relative orientation and are believed to have originated as wave-generated...
2012
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
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