The geology of Ascutney Mountain, Vermont . ion there is striking unconformity between the planes of depositionand the fissility, ^ a Note by Dr. Hillebrand, analyst: On boiling with dilute HCl, some HoS is given off, followedby a strong and persistent odor of volatilizing sulpliui-, showing the decomposition of a sulphidewith the formation of H^S and the simultaneous deposition of sulphur. It is probable thatboth pyrite and pyrrhotite are present. b Another sample gave per cent carbon and per cent COo. •^Geology of New Hampshire, Concord, 1877, Vol. II, p. 400. dSee Whittle, Th
The geology of Ascutney Mountain, Vermont . ion there is striking unconformity between the planes of depositionand the fissility, ^ a Note by Dr. Hillebrand, analyst: On boiling with dilute HCl, some HoS is given off, followedby a strong and persistent odor of volatilizing sulpliui-, showing the decomposition of a sulphidewith the formation of H^S and the simultaneous deposition of sulphur. It is probable thatboth pyrite and pyrrhotite are present. b Another sample gave per cent carbon and per cent COo. •^Geology of New Hampshire, Concord, 1877, Vol. II, p. 400. dSee Whittle, The genei-al structure of the main axis of the Green Mountains: Am. Jour,Sci., 3d series, Vol. XLVn, 1894, p. 347. Eichardson: Proc. Am. Assoc. Adv. Sci., Boston meeting, 1898, p. 296. PLATE II. A, Unaltered phyllite, showing normal plane-parallel strrictnre; ordinary light,X20. (Seep. 14.) B, Phyllite, showing bent laminae and strain-slip cleavage; ordinary light,X 20. (See p. 14.) 16 U. S. GEOLOGICAL SURVEY BULLETIN NO. 209, FL. II. (^)
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