Field Notebook: Massachusetts, New Hampshire, Vermont 1921
Page 47
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Transcription
It is our custom that the L.C. slate follow directly the dolomite series. The succession is thus: Permian and quartzite, Brinrock Marble, the first dolomite [illegible], the local conglomerate, and then the thick slate series (3000 ±). This makes at least 5600 feet of Lower Cambrian are Upper Cambrian. Stopping one night at St. Altaus, at the American House. [In 1923 Keith published a paper] saying that the St Altaus conglomerate me = Parotgian and hence all of the Beqjin slates are Parotgian. Therefore if the above only 2600 feet in Lower Cambrian and the 3700 feet of Beqjin slate an earlier Ordovician = Ogardian of Keith. [The field work of 1922 showed that the Milton dol. is Upper Cambrian, and that the Brinton Cong. is local Ordovician. The Ogardian lies below the Lowerm conglomerate.]