Eastport quadrangle notebook #2, 1907
Page 16
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Transcription
"1045" Reynold's Point N.E. 125 yds. S.W. Section east end Reynolds Cove. roughly corrected I lose limestone strike toward and appear to pass under the horizontal shelves of the south end of Blackford Island. Its limestone contains in places many ostracods - one or two specimens collected = 6.24.9a. The little ridge on the boundary to west 6.24.5 & 7 is a gray dike of a fluffy gray rock which is amorphous and (Porphyritic) in rare spots. This dike 1886 bears N. 20° W. Newark Dip 36° NE. The ridge immediately west of this is composed of pumice concretions limestone with holes at the top. The concretion bands are modular and end up by thick massive shrinkage cracks which have been filled in with gray calcareous mud dams of the beds are mostly masses of concretions 1 to 2 inches thick. The rock is the gray limestone crystalline in places but generally fine grained and containing ostracods scattered through and % or so fairly clustered within with an occasional Zygurita = 3.24.Pa. The limestone bands are 1 to 3 inches thick with fettings of thin shale, generally half an inch thick or less. 18 feet of close concretionary limestone ends and are followed by 4 feet of thin fine-grained in 1 to 3 foot masses with 1/2" to 2" cal- careous seams. Its shale relief is quite clearly a cleavage or rather fragmentation anterior to that of 6.29.Pa. 6N13° The rocks strike due west and dip 22° to the east. The principal joint in central 6.24.P shown on this map is a series of lime- stones which are cut at the surface by a thick 10 foot gabbro dike "dike A" is massive rock unders level under the limestone & appears to be the top edge of a high steep dome. This dike ex-tends N.30° E following along the tops of the argine limestones are seen to strike N 10-15° west & passing north-westernly along the cape the line of strike trends around toward the mid side of Cooper Island or N 45° W. The dip is steward 20°, or from east to north- east. About 40 feet of these limestones are exposed on the east side of the point and containing ostracods (Argyriosa) with a rare Zygurita & very rare trigula = 6.24.Pa. This forms at about 50 feet stratigraphically below 6.24.Bd. The beds of 6.24.Bd - Bd underlie in the former about 40 feet of limestone, top of about 30 feet and then 1 foot of 6.24.Pa or a total of 90 feet of sediments (limestones, including the creek gap). "extended map of strikes & dips in 6.24.Pa" Scale 1 = showing two gabbro dikes changes in dips, and trinity & porphyry and dike 1087 was the north end of the point there is another gabbro dike a couple of yards thick and on the extreme end of the point also high water the limestone strike West 25° North