VARYING CLASSIFICATION OP THE STOCKBRIDGE LIMESTONE. 



333 



by a broad belt of limestone occupying the Kutland 

 valley ; next, in Pine hill, we find a partial repeti- 

 tion of the series in the "frontal" range, namely, 

 massive quartzite underlain by a transitional gneissic 

 series ; then, on the western crest of the hill, a band 

 of black schist in contact with the band of crystal- 

 line limestone which occupies the second or Centre 

 Kutland valley. The narrow ridge west of this val- 

 ley is again formed by black schists, succeeded by a 

 third band of crystalline limestone in the West Rut- 

 land valley; and finally, black and greenish schists 

 form the slopes of the Taconic range. 



Earlier Opinions concerning the Rocks. — The lime- 

 stones of these three valleys belong to the Eolian 

 limestone of the Vermont geological report. In the 

 limestone of West Rutland, Reverend Augustus Wing 

 found Chazy fossils, as described by J. D. Dana in 

 the well-known articles in the American Journal of 

 Science,^ where the term " Treuton-Cbazy-Calcifer- 

 ous " was applied to the Eolian limestone in general. 

 Mr. Wing found no fossils in the Centre Rutland or 

 Rutland limestone belts, but was inclined to refer the 

 quartzite of Pine hill to the Potsdam and the Centre 

 Rutland limestone to the upper Calciferous and Que- 

 bec, or j^erhaps, including all the formations, to the 

 Trenton. The slates on either side of the West Rut- 

 land valley he considered younger than the limestone, 

 or of Hudson River age. 



In the geological map accompanying Mr. Walcott's 

 paper on "The Taconic system of Emmons," etc.,t 

 the slates or schists of the Taconic range west of West 

 Rutland are colored as lower Cambrian (Georgia). 



A paper on " The Taconic iron ores of Minnesota 

 and of western New England," by N. H. and H. V. 

 Winchell, appeared in the American Geologist for 

 November, 1890, in which the conclusion is reached 

 from a critical review^ of the literature that a part of 

 the Eolian limestone, noticeably that in proximity to 

 the Olenellus quartzite on the east, must be of Cam- 

 brian age. 





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*3d series, vol. XIII, 1877, pp. .332-347. 405-419. 



t Am. Journ. Science, 3d series, vol. XXXV, 1888, pp. 229,^401. 



