The Experts below are selected from a list of 219 Experts worldwide ranked by ideXlab platform
Grzegorz J. Nowak - One of the best experts on this subject based on the ideXlab platform.
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Lithotype variation and Petrography of coal seams from the żacler Formation (Westphalian) in the Intrasudetic Basin, southwestern Poland
Organic Geochemistry, 1993Co-Authors: Grzegorz J. NowakAbstract:Abstract Lithotype variations in the coal seams of the Westphalian zacler Formation were studied with reference to their maceral and microlithotype composition. District variability of lithotypes and Petrography in particular seam sections have been observed. Generally, semibright coals predominate in the coal seams of the NW part of the Intrasudetic Basin (the Walbrzych area), whereas in the Nowa Ruda area (E part) the seams studied consist mostly of bright lithotypes. The variation in lithotypes is directly related to petrographic variation on the microscopic scale. The seams studied predominantly contain vitrite, vitrinertite- vitrite, and trimacerites in particular parts of the Intrasudetic Basin. Megascopic lithology and Petrography of coals are the result of the different coal deposition environments.
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Lithotype variation and Petrography of coal seams from the Zacler Formation (Westphalian) in the Intrasudetic Basin, southwestern Poland
Organic Geochemistry, 1993Co-Authors: Grzegorz J. NowakAbstract:Abstract Lithotype variations in the coal seams of the Westphalian zacler Formation were studied with reference to their maceral and microlithotype composition. District variability of lithotypes and Petrography in particular seam sections have been observed. Generally, semibright coals predominate in the coal seams of the NW part of the Intrasudetic Basin (the Walbrzych area), whereas in the Nowa Ruda area (E part) the seams studied consist mostly of bright lithotypes. The variation in lithotypes is directly related to petrographic variation on the microscopic scale. The seams studied predominantly contain vitrite, vitrinertite- vitrite, and trimacerites in particular parts of the Intrasudetic Basin. Megascopic lithology and Petrography of coals are the result of the different coal deposition environments.
Chandra L. Reedy - One of the best experts on this subject based on the ideXlab platform.
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Thin-section Petrography in Studies of Cultural Materials
Journal of the American Institute for Conservation, 1994Co-Authors: Chandra L. ReedyAbstract:AbstractThin-section Petrography can serve a number of functions in studies of cultural objects. It is used to characterize and identify inorganic materials, locate the specific source of materials, group objects that may have a common source, and, less commonly, provide information on object deterioration and the effects of conservation treatment. This paper presents an introduction to the types of cultural materials and research questions that have been examined through thin-section Petrography. Examples involve studies of stone (sculptures and architectural materials), ceramics (vessels and sherds, terracotta sculptures, and architectural ceramics), glass and glazes, and miscellaneous materials such as clay core materials from bronzes, plaster and cements, frescoes, and slags
Ahmad Subhi M. Mustafa Lehlooh - One of the best experts on this subject based on the ideXlab platform.
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Sedimentology , Petrography and Geochemistry of the Upper Cretaceous Phosphate Between Madaba and Karak
1998Co-Authors: Ahmad Subhi M. Mustafa LehloohAbstract:Sedimentology , Petrography and Geochemistry of the Upper Cretaceous Phosphate Between Madaba and Karak، للحصول على النص الكامل يرجى زيارة مكتبة الحسين بن طلال في جامعة اليرموك او زيارة موقعها الالكتروني
Robin Armstrong - One of the best experts on this subject based on the ideXlab platform.
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Visualisation and quantification of CV chondrite Petrography using micro-tomography
Geochimica et Cosmochimica Acta, 2013Co-Authors: Dominik C. Hezel, Premkumar Elangovan, Sebastian Viehmann, L. Howard, Richard L. Abel, Robin ArmstrongAbstract:Abstract Micro-computed tomography is a non-destructive technique that allows the study of 3D meteorite Petrography. The technique produces a unique and instructive visualisation of the meteorite for quantifying its components. We studied the overall Petrography of the two CV chondrites Allende and Mokoia to constrain their formation histories. A set of movies and stereographic images detail the 3D Petrography. Component modal abundances agree with previous reports and modal abundance differences between Allende and Mokoia support the chondrule–matrix complementarity and that chondrules and matrix formed from the same chemical reservoir. We identified two types of chondrules, a normal type and one where a normal type I or II chondrule is almost completely encapsulated by an opaque-rich layer. This layer was probably acquired during a late stage condensation process. The appearance of opaques in chondrules and matrix is different, not supporting a genetic relationships between these. Low abundances of compound chondrules (1.75 vol% in Allende and 2.50 vol% in Mokoia) indicate low chondrule densities and/or low relative component velocities in chondrule formation regions. Porosities on a scale
L. Jacobson - One of the best experts on this subject based on the ideXlab platform.
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Ceramic Petrography: The interpretation of archaeological pottery and related artefacts in thin section ceramic Petrography [Book Review]
South African Archaeological Bulletin, 2013Co-Authors: L. JacobsonAbstract:Review(s) of: Ceramic Petrography: The interpretation of archaeological pottery and related artefacts in thin section ceramic Petrography, by Quinn, P.S. 2013, Oxford, Archaeopress, i+254 pp. ISBN 978-1-905739-59-2 (paperback), Price 35.00 pounds.
