. Jefferson, Berkeley, and Morgan counties, by Grimsley, assistant geologist. White, state geologist. These shales and sandstones are usually greenish orgreenish-gray in color and weather to a j^ellowish-green, but there arenot infrequent zones of brownish-red shales and sandstones. In cer-tain layers fossils are common and the characteristic species, Spiri-fer disjunctus Sowerby of Chemung stage, occurs frequently and thistogether with the presence of other Chemung species, lithologicalsimilarity and stratigraphic position indicates the correctness of thecorrelation of this division
. Jefferson, Berkeley, and Morgan counties, by Grimsley, assistant geologist. White, state geologist. These shales and sandstones are usually greenish orgreenish-gray in color and weather to a j^ellowish-green, but there arenot infrequent zones of brownish-red shales and sandstones. In cer-tain layers fossils are common and the characteristic species, Spiri-fer disjunctus Sowerby of Chemung stage, occurs frequently and thistogether with the presence of other Chemung species, lithologicalsimilarity and stratigraphic position indicates the correctness of thecorrelation of this division with the Chemung stage of New York. In the work of the Maryland Survey on the Devonian () Swartz recognized five subdivisions of the Chemung bedsas follows: Chemung. Upper shale and sandstone conglomeratic sandstone shale and sandstone conglomerate sandstone shale and sandstone beds. When ibis grouping of the strata is compared withProfessor Stevensons grouping of the Pennsylvania sectionsand south to New River, as given above, it is found to be PLATE XIII(A).—Hamilton Shales with Blocky Ledges above, and FinelyLaminated below, Low Grade Railroad Cut along Potomac.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectgeology, bookyear1916
