Abstract

During the writer's investigation of the metamorphic rocks of the Saxtons River area* in southern Vermont, certain facts aroused curiosity concerning the composition of sericite in the chlorite-sericite schist on Glebe Mountain, one of the larger mountains comprising the eastern range of the Green Mountains. First of all the sericite is greasy-feeling. Secondly it occurs in a schist that is believed to be stratigraphically equivalent to the schist containing kyanite at Gassetts, Vermont (Thompson, 1950; Currier, 1934, p. 335-339). With this information in mind, J. B. Thompson suggested to the writer that the greasy-feeling mineral might well be pyrophyllite, the dioctahedral analogue of talc and also a mineral which had been described elsewhere in the region (Hitchcock et al., 1861, p. 504-505). Pyrophyllite would be expected to metamorphose to the higher grade assemblage, kyanite-quartz, found at Gassetts.

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