Eastport quadrangle notebook #2, 1907
Page 18
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Transcription
Following the same line for the straight section, standing from 6.24.8 into 6.24.7 we find a basin of limestone with, on average, dips, the strike in the southerly portion being read with north dips and the strike swinging around to nearly North (N 15°W) and with east dips of 15 to 30°. These limestones are cut by 3 dikes of galto. The northernmost dike illustrates beautifully folding & siling. The limestone at this point were apparently once buried for limestone as the stratum from old lime hills. The average strike is N 60° W with dips of 22° to the N. Not more than 15 ft. of limestones are exposed, the strike line nearly conforming with the strike. The limestones are abundant shrinkage marked and one or two layers show nummulites. In the little cove sit the middle of 6.24.7 occurs a mixture of acid and basic volcanics, ash 1092, lava 1093, relations not ascertainable. On the west side occurs a granite sill. a couple of feet thick 1094 and in the limestones, the granites cut by a basic (galto) dike of of the same layer rock as 1096, 1093. There is apparently a fault line as shales are brought up on the south- north side of the lake. The shale forms the west shore of the little cove as far as the point of the main shore. In this shore occurs a little cliff of shale striking N 60° E and dipping only 6° to the west. The shale dips under a galbo sill - the sedimentary layer in- clude is to 15 feet of very flat clay shales with extremely flattened lay clearage, in calcareous matter in the lake. These follow 420 feet of unusual clay folded shales closely under the lakes. In the thin shattered lower shale a single Craticorad (Bayreuths. large) leaf from a centimetre long was found, also a single Camellibrual of Pterines densurus - these slates may be more fossiliferous but are so stretched to show any other fossils. The upper massive upper shales contain several Bayreuth species and a Trifolium (few spined) gastropod 6.24.7 B. The lower shale two fossils are 6.24.7 A - D. Thursday, July 11, '07. In the cove as the S.W. corner of sect 3, west of Birch Pt., some faded sediments appear on the east side these are green gray calcareous lods coursely rolled in stone. The beds strike N 80° W and dip to the north at a very low angle - 6 to 10° they may possibly be volcanic flows. They lie to the south to north of the base of these of the sand forest of Birch Pt. in 3. 51.7) their sedimentary beds, 1091, also crops out south side of bar at its right side. These beds dip under a massive trap or fine galbo 1097 which contains a vertical veins of chunks of pink syenite 1096A while the same vein if followed along for 40 or 50 paces as seen to turn into a green episode or olvin. 1096 B Continuing along the shore the rock 1091 is seen to a basin of rather princesses cleavate shales, the shale & unloos rock N 34° 2.57° N and the eastern joint of 2:55. B. At the outside meets up not in the same.