Eastport quadrangle notebook # 1, 1907
Page 8
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Transcription
8 ars older than the dike and not separated on the dike by any by their lens labeled at the contact, Dike 1050 and with 1079 and 1078 appears as a separate from a more like 1050 x 1079 appears to be the same offshoot. In the southern series of 6.5.5 lamellibranchs are abundant in the thin gray shales which appears at the same as the thin gray shales lower beds of 6.5.6a, These lamellibranchs are 6.5.5 a., The shells here dip 24° N. 12° W., Strike E. 10°N x W 100 S. (= N 90 E) Saturday, June 22, 1907 At the foot of the cliff on the east side of Blackford Head near its base after later B in Broad Cove there occurs a very interesting little exposure. A sea cave is worn into the tropes at the east of a jorum which runs approximately N.E. x S.W. On the N. side of this jorum deposits a little exposure of a sort of shale, (dark gray 651a) coarse sandy shales with a very characteristic frequent & wood copals fragment not collected), There is no trace of these beds on the south side, and the feature is just-- ally a fault. The shale dips at my high angle approximately 70°NE of Nock amount of dip minimum shales penetrated. The rock on the north side is 1053 that on the south is 1052. Both appear to be the same, a fine grained gray volcanic tuff which exterior lithologically, tells stratified beds of Kennell Head. In places the rock appears to include angular fragments of light-gray lava no. 1053. There are poorly fragment of lakes shales, No. 1052 as a single thin line kind of trap which is covered by thick mass beds of thin gray shales, perhaps fifty feet thick. These shales are quite friable strikes N 45°W. and dip ESE south-- west at an angle of 38°. They contain scars of lamelli- branchs and a few gastropods with some Lingulas and and in the same series with 6.5.5a and the general area of thin gray shales about Blackford Head & Broad Cove The brachi are 6.25.12a., The rock is free from quartzite or cal- careous sand concretions of thin beds of gray shale throughout. The lower part is not much folded & fragments are included in 1052 indicating that the latter is an intrusion. The upper 20 feet of 6.25.1a are extremely crumpled, con- torted & sheared into a massive wrinkled sheet. The rocks are quite dark in places and the glossy coal black appear- ances of the sheet has given ground a clean appearance of coal. This is one of the contact areas that has been regarded as a sort of field of flow; the so-called coal is merely the broken-- side structural shale in the upper part of 6.25.1a which, broken contact by the overlying volcanics. This volcanics represent flow of light gray lava including large fragments, a foot commonly, feet, or measurably 2.5 x 4 feet thick of another light gray Lava, 1054 one of these fragments. 1057 represents the native there resting 9 Shackford Head S.E. side. beginning 3.25° W. nickelinae of the underlying shales. A very sharply marked fault seams opposite the 4-st. standing in northern 6.25.1 (about 75 feet South of 6.25.1a which is at the north edge of the square). Into the fault is any slight, apparently on the same material as rock occurs on both sides, In the south side of this fault which appears to pear 325° W. the comboidal feature in the gray lava flows of finely developed. A hand specimen of this lava is 1057. On closer it is quite grimeous, a piece of grime is 1057 on another surface. The lava is in spots beautifully mottled with cream-- mixed areas. A mottled specimen in 1058 1057 is a dike which runs into through the lava post-1057 and bears 3.50°W. This dike also ends through the shales and across a very fault-- that bear 6. W. about 10 feet north and represents the area of the fault generally at regularly for some of the south shore cliff of this island and head the shale which are locally brought up, strikes in nearly the same direction as the fault, and displays a heavy drag of.