Petrology and origin of Precambrian metamorphic rocks in the eastern Ruby Mountains southwestern Montana - Smith, Kevin J
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Precambrian schists and gneisses are exposed in much of the Ruby Mountains of southwestern Montana. The major rock types include abundant quartz-feldspar gneiss, hornblende gneiss, amphibolite, quartzitic gneiss, and marble. Minor rock types important in the study area include anthophyllite gneiss, hornblende-pyroxene-plagioclase gneiss, quartz-hypersthene-garnet granulite, iron-formation, and hornblende-hypersthene granulite. These rocks form a concordant series folded into a broad, open antiform-synform pair in the study area. This volume is a revised edition containing the complete original…mehr

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Produktbeschreibung
Precambrian schists and gneisses are exposed in much of the Ruby Mountains of southwestern Montana. The major rock types include abundant quartz-feldspar gneiss, hornblende gneiss, amphibolite, quartzitic gneiss, and marble. Minor rock types important in the study area include anthophyllite gneiss, hornblende-pyroxene-plagioclase gneiss, quartz-hypersthene-garnet granulite, iron-formation, and hornblende-hypersthene granulite. These rocks form a concordant series folded into a broad, open antiform-synform pair in the study area. This volume is a revised edition containing the complete original text plus the addition of a number of appendices. These include all maps, data tables, field notes and petrographic descriptions. I have included a new structural analysis treating the area as a single domain with all 342 strike and dip measurements, and a structure cross-section cartoon and a suggested pre-metamorphic sedimentary section. These appendices allow the reader to assess the evaluation from original descriptions.
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Autorenporträt
Kevin is a professional geologist retired after 30 years with Shell Oil company and Royal Dutch Petroleum. Current interests, aside from Geology, include Birding, Crystal Radio, History, Heraldry, and Atmospheric Geophysics. All interests pursued are studied, documented and published where possible. Kevin's publications include his MS Thesis on the Precambrian basement of SW Montana, a technical Handbook on Crystal Radio, and four volumes concerning the Heraldry of the province of Alsace, France.