Eastport quadrangle notebook # 5, 1908
Page 192
Image from the Biodiversity Heritage Library. Contributed by Smithsonian Institution Archives. | www.biodiversitylibrary.org
Transcription
135 Quadrille Ruled Form. Patented 1906. John C. Moore Corporation, Rochester, N. Y. Back of the house of Mr.Saunders, the hill in northern 8:31:3/6 is com- pos ed of the greenish shales,or tuffaceous shales, highly slated.There is a little blue glassy rhyolite. The south shore of East Stream in 8;31;3 is composed of highly slated shales, supported on th east by a hillock of rhyolite. The slaty cleavage trends N.57 degrees east, and is nearly vertic- al. The bedding is very indistinct. It appears to strike N.5 degrees east and dip west at a very low angle, but this appearance may possibly be due to jointing. The slates are cut at the "Narrows" in the western part of 8:31:3 by a 20-foot gabbro dike. The slates reappear beginning in 8:31:2 eastern quarter, where the cleavage trends N.60 degrees east and is nearly vertical (dips 85 degrees south-east). Here again there are many planes developed striking N.8 degrees east and dipping west at an angle of 33 degrees. These appear to represent strike and dip. The slates continue as far as Moon Brook, and are cut by two gabbro sills, the eastern one extending N.E., and the western one, a dike, trending N.50 degrees west. The little bay about Moon Brook 8:31:1 is gabbro excepting the northwest corner where a strip of slate appears. To the west, the gabbro again appears on the rounded little point in eastern 8:31:1. The gabbro contains here long black lathes nearly a centimetre in length(hornblende?) and on the east margin has lavenderish- 30 28 26 24 22 OVE R 18 16 14 12 10 8 6 4 2