The Mynachdy Gneiss
نویسندگان
چکیده
منابع مشابه
Gneiss domes and gneiss dome systems
Various mechanisms have been proposed for the dynamic cause and kinematic development of gneiss domes. They include (1) diapiric fl ow induced by density inversion, (2) buckling under horizontal constriction (i.e., extension perpendicular to compression), (3) coeval orthogonal contraction or superposition of multiple phases of folding in different orientations, (4) instability induced by vertic...
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Precambrian quartzo-feldspathic gneiss was encountered at an elevation of —3616 feet in the Herman 1A well drilled in southeastern Erie County, Ohio, by the Amerada Petroleum Corporation. The five samples of this gneiss that were studied exhibit varying degrees of gneissose foliation. In order of decreasing abundance, microcline, plagioclase, quartz, and biotite together account for an average ...
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a School of Earth Sciences, Bristol Isotope Group, University of Bristol, Wills Memorial Building, Queen’s Road, Bristol BS8 1RJ, United Kingdom b School of Earth, Atmospheric and Environmental Sciences, Isotope Geochemistry & Cosmochemistry Group, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom c Department of Geological Sciences, NASA Lunar Science Institute Center f...
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Web services offer a more reliable and efficient way to access online data than scraping web pages. However, interacting with web services to retrieve data often requires people to write a lot of code. Moreover, many web services return data in complex hierarchical structures that make it difficult for people to perform any further data manipulation. We developed Gneiss, a tool that extends the...
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SUMMA R Y. In the Dahomeyan of the western Accra Plains marie gneisses, amphibolites, and orthoamphibolite dykes in granitic gneiss occur. During the latest recrystallization, metamorphic conditions ranged (north to south) from oligoclase--epidote amphibolite subfacies through andesineepidote amphibolite subfacies to at least the medium or upper part of the amphibolite facies. Chemical analyses...
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ژورنال
عنوان ژورنال: Geological Magazine
سال: 1947
ISSN: 0016-7568,1469-5081
DOI: 10.1017/s0016756800083060