A Practical Guide to Rock Microstructure by Ron H. Vernon

By Ron H. Vernon

Rock microstructures offer clues for the translation of rock historical past. a superb realizing of the actual or structural relationships of minerals and rocks is vital for profiting from extra designated chemical and isotopic analyses of minerals. Ron Vernon discusses the fundamental approaches accountable for the big variety of microstructures in igneous, sedimentary, metamorphic and deformed rocks, utilizing high quality color illustrations. He discusses capability problems of interpretation, emphasizing pitfalls, and focussing at the most up-to-date suggestions and techniques. Opaque minerals (sulphides and oxides) are talked about the place acceptable. the excellent checklist of appropriate references may be invaluable for complicated scholars wishing to delve extra deeply into difficulties of rock microstructure. Senior undergraduate and graduate scholars of mineralogy, petrology and structural geology will locate this booklet crucial interpreting, and it'll even be of curiosity to scholars of fabrics science.

Breadth of insurance (igneous, sedimentary, metamorphic and deformed rocks, together with connection with ore minerals)
entire reference checklist, performing as a superb start line for examine into microstructural problems
complete color illustrations

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Impure (quartz and clay-bearing) limestones (Fig. 23) and dolomites produce spectacular metamorphic mineral assemblages when heated (Chapter 4). g. 5). g. g. some cherts). 37 38 2 Microstructures of sedimentary rocks Fig. 24: Oolitic limestone, Lake Keepit area, north-western New South Wales, Australia. The limestone consists mainly of fossil shell and crinoid (sea-lily) fragments that probably accumulated in a lagoon near a coral reef being eroded by wave action. The dark rims of the ooids were formed by very fine-grained algal mud sticking to them as they were gently washed about in the lagoon.

26 2 Microstructures of sedimentary rocks Fig. 14: Carboniferous ash-fall tuff from the Hunter Valley, New South Wales, Australia, composed mainly of glass and phenocryst fragments (quartz, feldspar and deformed biotite) ejected in an explosive eruption. The fragments (glass shards) were formed by fragmentation of pumice (Fig. 95), the curved edges, sharp corners and Y-shapes reflecting former vesicles in the pumice. A few small pumice fragments with one or two gas bubble holes are present. The glass has been replaced by hematite (reddish brown) and zeolite (colourless).

5). g. g. some cherts). 37 38 2 Microstructures of sedimentary rocks Fig. 24: Oolitic limestone, Lake Keepit area, north-western New South Wales, Australia. The limestone consists mainly of fossil shell and crinoid (sea-lily) fragments that probably accumulated in a lagoon near a coral reef being eroded by wave action. The dark rims of the ooids were formed by very fine-grained algal mud sticking to them as they were gently washed about in the lagoon. The shapes of the ooids are determined by the shapes of the original clasts.

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