New data on the stratigraphy of metamorphosed strata of the southern part of the Sredinny Range of the Kamchatka Peninsula
Abstract
The first researcher who more or less fully classified the rocks composing the Middle Ridge was K. I. Bogdanovich. Based mainly on petrographic features, he divided the rocks into 13 groups. Metamorphosed rocks constituted 3 groups. Group 4 included various metamorphic shales of sedimentary and effusive origin. Group 3 included arch sandstones, schistose sandstones, etc., often indistinguishable from some rock varieties of group 4. Group 5 combined orthogneisses and intrusive rocks. The age of all these metamorphosed formations K. Bogdanovich attributed the age of all these metamorphosed formations to the Paleozoic, but it is not older than the Devonian.
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