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The AAPG/Datapages Combined Publications Database

Showing 3,219 Results. Searched 200,621 documents.

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Three-Dimensional Measurement of Sand Grains: GEOLOGICAL NOTES

Jim L. Huitt

AAPG Bulletin

... it is necessary to characterize non-spherical sand grains dimensionally. In viewing most sand grains under magnification on a given plane, two dimensions...

1954

Archeopyle in Fossil Dinoflagellates: ABSTRACT

William R. Evitt

AAPG Bulletin

... in studying those dinoflagellates with spherical bodies, long processes, and obscure tabulation, called hystrichospheres. End_of_Article - Last_Page...

1965

Ordovician Algal Stromatolites in Upper Mississippi Valley: ABSTRACT

Richard A. Davis, Jr.

AAPG Bulletin

... including biogenic sand-size material and large pieces of shell material. Small spherical pellets are rare. Most samples contain some End_Page 609...

1966

Texture and Grain Surface Character of St. Peter Sandstone: ABSTRACT

Eugene J. Amaral, Wayne A. Pryor

AAPG Bulletin

... description of the St. Peter Sandstone as a very well-sorted sandstone with very well-rounded nearly spherical, and eolian frosted grains, is in error. End...

1971

Geologic Reservoir Analysis of Kirkwood Sandstone, Illinois: ABSTRACT

M. Holmes, A. J. Eloy, D. J. Ver Steeg

AAPG Bulletin

... network than those with skewed distributions. A theoretical 2-dimensional model of the pore network involving cubic packing of spherical grains...

1972

Radiolarian Ratios and Pleistocene-Holocene Boundary: ABSTRACT

Kenneth J. McMillen

AAPG Bulletin

... with the Pleistocene-Holocene boundary. The ratio of nassellarian (cone-shaped) radiolarians versus spumellarian (spherical) radiolarians decreases...

1979

Origin of Ooids in Pleistocene Miami Limestone, Florida Keys: ABSTRACT

Charles Franz, Kahle

AAPG Bulletin

... of calcified spherical bodies of algal or fungal origin. (3) Sheet (common): pavement-like layers of batons that are typically 0.5 to 2.0 µ long...

1981

Progressive Stages of Diagenesis in Early-Middle Eocene Fore-Arc Delta, Shelf, Slope, and Basin Sandstones, Southern Coast Range, Oregon: ABSTRACT

Marjorie A. Chan

AAPG Bulletin

... of calcite cementation preserved open framework-supported textures in spherical concretions. A second stage of mixed-layer clays formed cement rims...

1982

Pisoliths of Fairview Valley Formation, San Bernardino County, California: ABSTRACT

J. C. Nellis

AAPG Bulletin

... Fairview Valley Formation (Permian-Triassic?) crops out beneath the Sidewinder Volcanics in the Mojave block, southern California. Abundant spherical...

1982

Carbonate Sediment Produced by Rock-Boring Urchin, Echinometra lucunter, and Infauna, Black Rock, Little Bahama Bank: ABSTRACT

Charles M. Hoskin, John K. Reed

AAPG Bulletin

.... The samples were placed separately in 20L, 62.5 µm screen-walled buckets for 2 days (18 useable measurements). Urchins produced spherical...

1984

Morphologic Information on Cretaceous Nannofossils from Niobrara Formation: ABSTRACT

J. Mitchener Covington

AAPG Bulletin

.... Nine species were found with coccospheres intact, including a species of Biscutum with extraordinary cylindrical rather than spherical coccospheres...

1985

Linear Features on Global Topographic Image: DISCUSSION

I. B. Campbell

AAPG Bulletin

... of these disruptions? Why are they global and apparently spiral on a spherical projection? I pose these questions with the hope that readers may examine...

1993

ABSTRACT: A Deep-Water Seafloor Implosive Source with Applications for Off-Shore Instrumented Oil Fields and Sub-Sea Exploration; #90007 (2002)

Allan W. Sauter, LeRoy M. Dorman

Search and Discovery.com

.... In addition, the cylindrical rather than spherical shape of our implosion chamber should radiate energy non-isotropically, producing shear waves. Presently...

2002

ABSTRACT: Characterization of lateral petrophysical heterogeneity within Paleozoic dolomite reservoir facies using outcrop analogs; #90018 (2003)

Colette B. Hirstius

Search and Discovery.com

... meters and can be modeled using a spherical model. The nugget effect is generally high and accounts for approximately 50% of the variance. A distinct...

2003

ABSTRACT: Self-Organized Breakup of Gondwana; #90061 (2006)

James W. Sears

Search and Discovery.com

..., and fracture arrangement met conditions imposed by Euler’s rule for ordering convex polyhedrons on a spherical shell. The tensile stress field that initiated...

2006

ABSTRACT: Outcrop Characteristics for the Woodford Shale; #90133 (2011)

Richard D. Andrews

Search and Discovery.com

... perfectly spherical and contain concentric internal banding. The nodule core is typically calcareous. Thin siltstone and dolomitic beds ~1 ft thick...

2011

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