Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
| www.biodiversitylibrary.org
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