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The AAPG/Datapages Combined Publications Database

Showing 440 Results. Searched 195,354 documents.

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Other Carbonate Grains: Peloids

AAPG Special Volumes

... ooids illustrating strong birefringence and a pseudo-uniaxial cross. X.N. 0.11 mm. (Middle). Holocene sediment. Joulters Cay, Bahamas. This is the same...

1978

Chapter 16 - Diagenesis: Sulfate & Halide Cements and Authigenic Precipitates

Dana S. Ulmer-Scholle, Peter A. Scholle, Juergen Schieber, Robert J. Raine

AAPG Special Volumes

... masses. It is monoclinic, has pronounced cleavage, is typically colorless in thin section, has low birefringence (just slightly higher than quartz...

2014

Abstract: Faults, Joints and Anisotropy Dominate Sonic, Resistivity Log Responses in a Geopressured Wabamun Limestone Gas Reservoir at Resthaven; #90225 (2015)

Gordon M. Uswak and Murray Gilhooly

Search and Discovery.com

..., induction log polarisation horn and conductivity anomalies, sonic waveform refraction and birefringence, and Stonely acoustic wave velocity...

2015

Relations of Gypsum and Anhydrite: DISCUSSION

Leo Ogniben

Journal of Sedimentary Research (SEPM)

... to the optical axes" (Ogniben, 1957a, p. 67, column 2, last paragraph) has nothing to do with low birefringence (Goldman, 1957, p. 196, column 1...

1957

Chapter 1 - Grains: Quartz and Silica

Dana S. Ulmer-Scholle, Peter A. Scholle, Juergen Schieber, Robert J. Raine

AAPG Special Volumes

..., but fractures and healed fractures can be common. Relief and optic sign: Low; uniaxial (+). Birefringence: First-order (in a 30-μm section) typically first...

2014

Associated Sediments

AAPG Special Volumes

... conditions. Note fine crystal size and low birefringence of chert. XN. 0.10 mm. (Middle). Upper Cretaceous White Limestone. Northern Ireland. A chert...

1979

The Clay Minerals and Their Identity

Clarence S. Ross, Paul F. Kerr

Journal of Sedimentary Research (SEPM)

...; cleavage, perfect on basal plane; approximate index of refraction about = 1,560, = 1.565, = 1.566; birefringence, 0.006; optical character, negative...

1931

Authigenic Montmorillonoid Cement in Andesitic Sandstones of Central California

J. F. Lerbekmo

Journal of Sedimentary Research (SEPM)

... different refractive indices, birefringence, and color. These features, illustrated in plate 1, C and D, suggest that the montmorillonoid...

1957

Geology of the Subsurface Igneous Rocks of Sunflower County, Mississippi

Danny W. Harrelson , James L. Coleman, Jr. , Philip L. Cook, Jr.

GCAGS Transactions

.... The clinopyroxene augite (.2-.4 mm) occurs as stubby, euhedral phenocrysts with moderate birefringence and alteration to chlorite along phenocryst...

1992

Beach Sand at Los Ojos De Agua De San Telmo, Michoacan, Mexico

Fred M. Bullard, Richard A. Mills

Journal of Sedimentary Research (SEPM)

..., the birefringence as well as the pleochroism is difficult to observe. All of the specimens are free of inclusions and they do not appear to be badly weathered...

1951

Heavy Minerals from the Viking Formation, West Central Alberta

H. R. Young

CSPG Bulletin

... in outline and frequently are aligned. The mineral is characterized by its detrital form and weak birefringence (Plate 2, Figs. 9-12). Collophane...

1965

The Occurrence of Moissanite (Silicon Carbide) in Sediments: DISCUSSION

C. H. Edelmann

Journal of Sedimentary Research (SEPM)

.... In several of the first slides prepared, varying amounts of a strongly colored substance with a very high index of refraction and low birefringence...

1932

Petrographic Microscope Slides of Detrital Mineral Grains

Paul Herbert, Jr.

Journal of Sedimentary Research (SEPM)

.... For classes in optical studies crushed minerals can be selected and grains mounted to show stages in relief or birefringence. The writer wishes...

1942

Abstracts: The Deconvolution of Multicomponent Trace Vectors; #90173 (2015)

Xinxiang Li, Peter Cary, and Rodney Couzens

Search and Discovery.com

... systems. Cary (1995) discussed a dilemma regarding data scaling/deconvolution and birefringence layer-stripping. High quality converted-wave data...

2015

Chapter 13 - Diagenesis: Clay Cements

Dana S. Ulmer-Scholle, Peter A. Scholle, Juergen Schieber, Robert J. Raine

AAPG Special Volumes

... index (RI) and optic sign, are rarely used in identifying clay mineral cements because of their small crystal sizes. Instead, color, birefringence...

2014

P- and PS-Wave Vector Wavefields for Anisotropic Petrophysics

James Gaiser

Petroleum Exploration Society of Australia (PESA)

... amplitude depends on S-wave birefringence. PS-waves are ideal for determining this Swave splitting information from layerstripping and their reflectivity...

2016

Igneous Rocks from Deep Wells in West Texas: GEOLOGICAL NOTES

Leroy T. Patton

AAPG Bulletin

...------------------------------ alteration along the cleavage cracks. The optic angle was measured and was found to be 2V = 89°. The maximum birefringence...

1945

Ultra-Thin Thin Sections In Carbonate Petrology: A Valuable Tool

R. C. Lindholm, D. A. Dean

Journal of Sedimentary Research (SEPM)

... mineral identification because different mineral species show characteristic interference colors, depending on birefringence and orientation...

1973

Glossary

Joann E. Welton

AAPG Special Volumes

... sediment. birefringence: The ability of crystals other than those of the isometric system to split a beam of ordinary light into two beams of unequal...

1984

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