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Excerpt from Structure of Metamorphic Rocks at Mineral King, California Bedding in the less competent rocks has been transposed into lenticular lithologic layering, or foliation, by slip on cleavage. The foliated rocks are inferred to have deformed by a process akin to laminar slip on cleavage with strike-slip movements perpendicular to the vertical axis of cleavage intersections. As a consequence of the transposition of bedding, major folds formed by bedding tend to be obscured, or even obliterated, and a superficially homoclinal sequence of bedded and foliated rocks is produced. Pervasive disharmonic folding on all scales interrupts regular repetition of units by folding and thereby further obscures major fold patterns. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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A text which aims to help undergraduate students in geology to recognize and interpret metamorphic textures and microstructures in thin-section. For lecturers and postgraduates in geology and petrology, the book provides reference for the interpretation of metamorphic rocks.
Excerpt from Metamorphic Geology: A Text-Book The composition of the average igneous rock as calculated from analyses of sediments. Comparison of calculated proportions of sediments with those observed In geologic sections katamorphic redistribution OF average igneous rocks IN terms OF sediments (by volume) Volume change in development of unconsolidated sediments Total volume of sediments calculated from amount of ocean salts katamorphic redistribution OF igneous rocks IN terms OF min erals (by weight) Average mineral composition of igneous rocks Average mineral composition of sediments Redistribution of quartz Redistribution of the Ieldspars. Redistribution of ferromagnesian minerals Redistribution of principal accessory minerals katamorphic redistribution OF igneous rocks IN terms OF chem ical constituents (by weight). Constituents added from the hydrosphere and atmosphere during katamorphism of igneous rocks Redistribution of Silica. Alumina iron. Magnesia. Lime. Potash. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
An introduction to the thin section description and interpretation of metamorphic rocks, their textures, and microstructures, for advanced undergraduate and graduate geology students. Sections cover some of the broader aspects of metamorphism and metamorphic rocks, the basics of description and interpretation of the textural/microstructural features from the simplest to the more complex, and advanced interpretations in polydeformed and polymetamorphosed rocks. Also available in paper (02414-2), $29.95. Annotation copyrighted by Book News, Inc., Portland, OR
This book describes metamorphic rock formation mechanisms in a simplified form. It presents the geometrical rules which control mineral assemblages as a function of rock composition, and provides the basis of a thermodynamical approach used for equilibrium slope calculations as well as for the evaluation of P, T stability fields of mineral associations. On the basis of several examples from the literature, the author emphasizes the relations between different metamorphic gradients and different geodynamic situations. Associated P-T-t paths are examined from several points of view including the respective roles of heat conduction and convection. Audience: This textbook will be useful to undergraduate students in geology, but also to research students and scientists needing to rapidly update their knowledge of metamorphism. It is also accessible to anybody interested in geosciences wanting to acquire a basic knowledge of the close relationships that exist between geodynamics and metamorphic processes.