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The AAPG/Datapages Combined Publications Database
Showing 10,864 Results. Searched 196,436 documents.
Paleozoic Rocks of Grand Canyon
Edwin D. McKee
Four Corners Geological Society
... by Sharp (1940, p. 1264) have indicated that weathering extended to a depth of at least 50 feet below the surface. A verdict of “intense chemical...
1969
Paleopedologic and Paleohydrologic Records of Precipitation Seasonality from Early Pennsylvanian "Underclay" Paleosols, U.S.A.
Steven G. Driese, Eric G. Ober
Journal of Sedimentary Research (SEPM)
... with depth and range between 85 and 95.5% (Fig. 8F). The chemical index of alteration (CIA) is a measure of the degree of chemical weathering of earth material...
2005
Geology of the Nuhn Uranium Ore Body, Jackson Group, South Texas Uranium District
Richard P. McCulloh, Charles Roberts
South Texas Geological Society Special Publications
... depth of 65 ft., of which 725 were core holes with an average of 29 cored ft. per hole. A total of 21,135 ft. of core was taken from the Korzekwa tract...
1986
GEOPHYSICAL CASE HISTORY OF THE ALTURITAS CONCESSION, STATE OF ZULIA WESTERN VENEZUELA
Harry R. Stenson
Asociación Venezolana de Geología, Minería y Petróleo (AVGMP)
... in the near-surface section, due to differential weathering. Gravity calculations determined the maximum possible depth to the causative structure...
1962
Geology of the Nuhn Uranium Ore Body, Jackson Group, South Texas Uranium District
Richard P. McCulloh, Charles T. Roberts
Bulletin of South Texas Geological Society
... holes by adjacent core holes. Each core hole took continuous core of the host sand interval. In all, 1,367 holes were drilled to an average depth of 65...
1983
Characterization and Simulation of Fluid Flow in Natural Fracture Networks
Hugo Harstad, Lawrence W. Teufel, John C. Lorenz
Rocky Mountain Association of Geologists
... regional fracture trend. In addition each grid was referenced to true north and the strike and dip of each outcrop bedding plane was measured. Grid size...
1997
Integrated reservoir characterization of low resistivity thin beds using three-dimensional modeling for natural gas exploration
Lim Yen Jun, Lo Shyh Zung
Geological Society of Malaysia (GSM)
... Zhang Xi structure. Yung Kuang structure is placed between two faulted structures, created a prominent two-way dip semi closure structural trap on (YK-1...
2018
Lithified Carbonates from the Deep-Sea of the Equatorial Atlantic
Geoffrey Thompson, V. T. Bowen, W. G. Melson, Richard Cifelli
Journal of Sedimentary Research (SEPM)
... about 43°N latitude, at depth about 1405-1180 m on the Mid-Atlantic Ridge, contained massive dolomite very similar petrologically to that of Pierce...
1968
Mineralogy And Sedimentation History, Santa Barbara Basin, California
Peter Fleischer
Journal of Sedimentary Research (SEPM)
... of Santa Clara River sediments is suggested by drainage area calculations, and supported by a comparison of <62µ mineral suites and chlorite content...
1972
A Quantitative X-Ray Diffraction Technique Applied to Fine-Grained Sediments of the Deep Gulf of Mexico
S. B. Devine , R. E. Ferrell, Jr., G. K. Billings
Journal of Sedimentary Research (SEPM)
..., Regional clay mineral facies: products of weathering intensity and current distribution in the northeastern Gulf of Mexico: Geol. Soc. America Bull., v. 73...
1972
Geology and Uranium Geochemistry of the Chinati Mountains Caldera, Trans-Pecos Texas
Joseph C. Cepeda, Christopher D. Henry, Timothy W. Duex
AAPG Special Volumes
... dip 15 and 20 degrees to the southwest adjacent to horizontal flows of the lower rhyolite. These field observations suggest that (1) the arcuate...
1981
Petrography and Composition of Authigenic Feldspars, Oligocene Frio Formation, South Texas
K. L. Milliken
Journal of Sedimentary Research (SEPM)
... grain and overgrowth. Depth 7,630 ft (2,326 m). End_Page 366------------------------ from several up-dip wells in which samples were available over...
1989
Assumed Holocene Highstands, Gulf of Mexico: Basic Issues of Sedimentary and Landform Criteria--DISCUSSION
Ervin G. Otvos
Journal of Sedimentary Research (SEPM)
... to weathering for several millennia, the tests would have disappeared long ago. In addition, radiocarbon ages from two coastal ridges reproduced...
2001
Applications of Fluorescence Microscopy to Study of Pores in Tight Rocks (1)
DANIEL J. SOEDER
AAPG Bulletin
... only epoxy-impregnated pores are visible. The effect is shown in Figure 3 for a specimen of Lower Cretaceous Travis Peak sandstone from a depth of 8,275...
1990
Modifications of the petroleum system concept: Origins of alkanes and isoprenoids in crude oils: Reply
James Collister, Robert Ehrlich, Frank Mango, Glenn Johnson
AAPG Bulletin
... proportions of analytes, to be inappropriate, that concentrations instead of proportions are the ideal metric for such calculations. However, chemometric...
2005
Brine volume and salt dissolution rates in Orca Basin, northeast Gulf of Mexico
Robin S. Pilcher, Raleigh D. Blumstein
AAPG Bulletin
...)-thick brine layer and overlying seawater produces a strong seismic reflector in the water column at a depth of approximately 2251 m (7385 ft) below sea...
2007
Characteristic Geometries of Distal Fine-Grained Fans Based on Mississippi Fan, Jackfork, and South Africa Studies
Arnold H. Bouma, Daniel J. Rozman, Donald E. Rehmer, Samuel K. Huisman
GCAGS Transactions
... mi (36 km) of horizontal deposits. A dip varying 1-3 degrees to the east results in good outcrops on the west side. Good outcrops are located...
2007
Use of Unmanned Aerial Vehicles (UAVs) to Create Digital Outcrop Models: An Example from the Cretaceous Cow Creek Formation, Central Texas
Chris Zahm, Josh Lambert, Charlie Kerans
GCAGS Journal
... cloud to enable calculations of dip and dip angle. The DEM for this model is 12,300 x 17,858 grid cells resulting in 3.28 cm/pixel. These products...
2016
Applying Multimedia Modeling to Karst Systems: Comparing MEPAS, MMSOILS, and RESRAD
James L. Regens, Karen R. Obenshain, Curtis Travis, Martin Clauberg
Environmental Geosciences (DEG)
... to weathered bedrock, although actual depth varies between locations depending on topography, degree and depth of weathering, and structure...
1999
Strontium Isotope Stratigraphy and the Oligocene-Miocene T-Letter Stages in Papua New Guinea
T. L. Allan, J. A. Trotter, D. J. Whitford, M. J. Korsch
Papua New Guinea (PNG) Petroleum Convention Proceedings
... and on the retention of prim ary fabric as affected by weathering and/or diagenetic “recrystallisation”. In the traverse (spot) samples typically collected...
2000
Nontronitic Clay Pseudomorphs of Cretaceous–Paleogene (K–T) Boundary Microtektites, Shell Creek, Alabama, U.S.A.
Ray Ferrell, David T. King Jr., Lucille W. Petruny
Journal of Sedimentary Research (SEPM)
...–lower Clayton Formation interval exposed in Shell Creek. Standard measured section with generic weathering profile is indicated, and standard symbols...
2011
Geometry and Origin of the Burbank Sandstone and Mississippian "Chat" in T. 25 and 26 N., R. 6 E., Osage County, Oklahoma
Jaime A. Cruz
Oklahoma City Geological Society
.... The regional dip of the rocks in the thesis area is westward at the rate of 35 feet per mile, as measured on the top of the Oswego limestone. Tectonic...
1967
Raman Spectroscopic Investigations of Burgess Shale-Type Preservation: A New Way Forward
Alison Olcott Marshall, Randol L. Wehrbein, Bruce S. Lieberman, Craig P. Marshall
PALAIOS
... and weathering that the fossils have undergone. Previous approaches could not always provide the level of detail about these pathways that Raman...
2012
Heartburn in Predicting Natural Fractures: The Effects of Differential Fracture Susceptibility in Heterogeneous Lithologies
John C. Lorenz
Rocky Mountain Association of Geologists
... though it consists of a coarsegrained sandstone similar to the adjacent fractured beds. Outcrops of this lens have been more rounded by weathering than...
1997
Stratigraphy and Depositional Environments of the Miocene Branch Canyon Formation in the Sierra Madre, Caliente Range, and Sespe Creek Areas, California
Michael L. Perri, A. Eugene Fritsche
Pacific Section SEPM
..., 1969) for the lower Santa Margarita Formation. Such a small and consistent change in depth over a wide area could very easily be accomplished...
1988