A Composite Gneiss near Barna (County Galway)
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Precambrian Quartzo - Feldspathic Gneiss from the Herman 1 A Well , Erie County , Ohio
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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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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ژورنال
عنوان ژورنال: Quarterly Journal of the Geological Society
سال: 1915
ISSN: 0370-291X
DOI: 10.1144/gsl.jgs.1915.071.01-04.11