Eastport quadrangle notebook # 3, 1907
Page 25
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Transcription
42 ululation = No. 6537. About 5 feet of light gray isolated under the trap E. 20° and strike N. 5°E. They contain some nodular pebbles & Cy.tentaculata = 653.7 A. As these are much broken & thick bedded - they do not form a good type of the Prince's Cove shales. Now this spot proceeding north and around the Point cliffs of trap are exposed until on the east side of the point, northerly, of 60 to 150 feet there seem in the bluffs at the first & top cliff, some dark blue thin bedded shales containing (not coll.) forams, compressed clachenids, foraminifera, 653.7 A. (cluding small mediolopsides & Lingula) Lingulocardis sp. - the shales strike N. 8°W at the N. end and N. 5°E at the south and a few rods away. The dip is to the east 1-25° At the north and two little patches of dark blue slate against trap to the contact bedding N. 75°W. The trap cliff forms this high tide slope in the west. South end of shales unknown. Due west of the little island seems another patch of shale of a darker color along a very light gray -like patch of shale is cut off on the north and south by trap, the south North boundary trending N. 80°W and crossing S. 5-1242 & third boundary trends N. 30°W. in a well developed fault plane. This little satch of light gray shales strikes N. 75°E. and dips East at 1-20°. No forams. Mud balls common near the south contact - The shales are sharred a darker color. The trap in the south of the little patch of light gray shale forms only a very narrow beds and is followed on the south by a mess of shales. The contact with the trap runs E.W. or S.S.E. W. Now the contact the shales strike N. 5°E and dip cast at an angle of 17° They contain a species of Lingulocardis of which a couple of specimens were obtained - recently discovered specimens of Katy- schrenus also being as well as Byricinus & Bojame = 6.53.7 A. As the shales are very A in color from dark brown black to gray & light gray - the latter may be due to bedding of the shales continue for no. 100 yards of exposures to the south - a short way fur this strike becomes N. 35°E and dip 47° S.E. The shale here contain a few scattered valves of Lingulocaris etc. a rare Phlyctochrea & Byriclina = 6.53.7 A. Then the south end of the exposures of shales - we saw found not cut in face but evidently belongs to same shales containing a band of Katfelichirus & some with Cy.tentaculata = 6.53.7 A3 43 In east stream at the Bridge near Grand Point have prominent cliff formed thick strata striking N.10°W, dip cast @25°. These thick bedded types on the south side of the stream part of the bridge form a narrow ridge for a little galbro like, 48-50 feet thick which here trends N. 72°W. A specimen a couple of feet from the north contact is 1231. It is moderately coarse or a galbro - In the middle of the ridge however the galbro is extremely coarse and the pink feldspar gives the rock a mantled aspect specimens (1222) on the south east of the ridge nearly 200 yards, the thick bedded basic tuffs about- by narrow shoots of trap (1236) only a couple of feet wide irregular in outline and a- bloody terminating at the shore core. The basic tuffs continue along the shore northwest for over a quarter of a mile Spec- imens are 1237, 42. Then the- play a uniform strike of N. 10-12° W and dip East 22-28° (average @ 25°). The foreground trap (1233) might at first be considered a contact face of the galbro north than 231, but this is not reliable as 60 yards northwest of the bridge the cliff, here massive & columnar are cut by a 20 foot dike of similar trap which I. homogeneus throughout. a specimen from the middle 1243 is similar to 1233. Gravel Gravel point X8