Download e-book for iPad: A Color Guide to the Petrography of Carbonate Rocks: Grains, by Peter A. Scholle

By Peter A. Scholle

ISBN-10: 0891813586

ISBN-13: 9780891813583

This quantity expands and improves the AAPG 1978 vintage, a colour Illustrated consultant to Carbonate Rock ingredients, Textures, Cements, and Porosities (AAPG Memoir 27). Carbonate petrography may be very complex. altering assemblages of organisms via time, coupled with the randomness of thin-section cuts via complicated shell types, upload to the trouble of picking out skeletal grains. additionally, simply because many basic carbonate grains are composed of risky minerals (especially aragonite and high-Mg calcite), diagenetic alteration more often than not is kind of wide in carbonate rocks. the variety of inorganic and biogenic carbonate mineralogy via time, despite the fact that, complicates prediction of styles of diagenetic alteration.This e-book is designed to assist take care of such demanding situations. It incorporates a wide selection of examples of in general encountered skeletal and nonskeletal grains, cements, materials, and porosity kinds. It comprises huge new tables of age distributions, mineralogy, morphologic features, environmental implications and keys to grain id. It additionally includes a variety of noncarbonate grains, that ensue as accent minerals in carbonate rocks or which may offer very important biostratigraphic or paleoenvironmental info in carbonate strata. With this consultant, scholars and different staff with little formal petrographic education can be capable of learn skinny sections or acetate peels below the microscope and interpret the most rock components and their depositional and diagenetic historical past.

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Extra resources for A Color Guide to the Petrography of Carbonate Rocks: Grains, Textures, Porosity, Diagenesis (AAPG Memoir) (Aapg Memoir)

Example text

1 mm Lo. , Nevada Oblique sections through the reproductive parts of two charophytes again showing variations in views of the central cavity and surrounding cortical tubes. , a planktonic, lacustrine organism. Although not a charophyte, it is both a green alga and one of the few calcareous planktonic organisms that contributes carbonate to lacustrine sediments. It thus is commonly found in association with charophytes in such deposits. Photograph courtesy of Walter E. Dean. -Holocene Family Gymnocodiaceae: Permian-Cretaceous Environmental Implications: Photosynthetic — require light, but are the algal group best adapted to use the blue light that penetrates into deep waters.

The rounded, cigar-shaped exteriors of these grains made them easy to transport and orient, and as such they can be useful paleocurrent indicators. 4 mm Lo. , New Mexico A high-magnification view of a fusulinid foraminifer showing the numerous, closely-spaced pores that perforate the microgranular calcite of the test wall. In lower magnification views, these pores are essentially invisible. , Oklahoma Encrusting foraminifers (arrows) on a neomorphosed, highly ornamented bivalve shell. The globular, chambered, foraminiferal structure is barely visible within the dense, micritic encrustation.

623, Årsbok 61, no. 8, 75 p. Podobina, V. , 1990, Composition and microstructure of agglutinated foraminifer wall, in C. Hemleben, M. A. Kaminski, W. Kuhnt, and D. B. , Paleoecology, biostratigraphy, paleoceanography and taxonomy of agglutinated foraminifera, v. 327, D. Reidel Publishing Company, p. 19-23. Thompson, M. , 1964, Fusulinacea, in R. C. , Treatise on Invertebrate Paleontology, Part C, Protista 2: Geological Society of America and the University of Kansas Press, p. C358-C436. Towe, K.

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A Color Guide to the Petrography of Carbonate Rocks: Grains, Textures, Porosity, Diagenesis (AAPG Memoir) (Aapg Memoir) by Peter A. Scholle


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