Field Notebook: Vermont 1922
Page 9
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Transcription
Irastburg, Vt., July 2, 1932. Sunday Left St Johnsbury at 9.30 A.M., northwest through Concord, Woodstock, Sheffield, Glover, Barton to Orleans where we had lunch at 1 P.M. Just before getting into Orleans saw beside the road a critical outcrop of quartzites, with thin zones of petrolite lenses at some unknown distances cut by a pegma- tite dike about 18 miles thick. The latter is unmeta- morphosed and is therefore of Appalachian age. The Oceania porphyrites are all metamorphosed according to Keeth. These held because of their resistant nature held them bedding plane. I saw no fossils. Maybe Ordovician or some old, pre-Cambrian age. Perhaps the former. In the afternoon went five miles east to Irastburg. Due just south of the village on either (= across) brook, may be seen in place ex- posures of a much foliated dark hard phyllite (Richardson calls it limestone) seems to be made up of a shale with some lime and small fine grained sand. It is a stranded series dark of sandy layers interbedded with thin shale beds and the whole rather incompetent or trap under cutting it flows readily. When the beds are much there hard in the center or parts of the section one sees a