Bulletin Volume 481-490

Bulletin Volume 481-490

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 edition. Excerpt: ... structure: At the south quarry the gneiss foliation strikes N. 80-85 E. and dips 20-25 N. 5-10 W. The sheets, 1 to 3 feet thick, dip with the foliation. There are four sets of joints: Set A, striking N. 70 E., dipping 75 S. 20 E. is spaced 2 to 5 feet; set B, striking north, vertical, is spaced 2 to 5 feet; set C, striking N. 40 E., is vertical; set D, striking N. 75-80 W., dips 30 S. 10-15 W. At the northern opening the gneiss foliation strikes N. 75 E. and dips 25 N. 15 W. The sheets, 2 to 6 feet thick, dip with the foliation. There are two sets of joints: Set A, striking X. 50 E., vertical; set B. striking N. 10 E., vertical or steep east, forming an 8-foot wide heading at east edge of quarry. Pegmatite dikes, 1 inch to 2 feet thick, dip low northeast. The rift at both quarries is parallel to the long axes of the lenses and at right angles to the gneiss foliation. The grain is parallel to that foliation and the hardway is transverse to it and to the lenses. These quarries were not in operation in 1008 and had evidently been idle for a number of years. Transportation was by cart or car one-fourth mile to dock. ou LYME. MACCUKDY QUABRY. The MacCurdy quarry is in the township of Old Lyme, on Duck River, between Lyme village and the Lyme & Blackball station. (See PL I.) Owner, Mrs. Evelyn MucCurdy Salisbury, 237 Church Street, New Haven, Conn. The granite (specimens D, XXX, 49, b, c, d, the last being a polished cube with edges 3.5 inches), MacCurdy granite, is a pegmatite with the composition of a biotite granite. Its general color is medium pinkish-reddish gray spotted with black. Its texture is very coarse porphyritic with feldspars to 1.5 inches (exceptionally to 4.5 inches) and mica mostly under 0.5 inch (exceptionally to 1...
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Product details

  • Paperback | 438 pages
  • 189 x 246 x 23mm | 776g
  • United States
  • English
  • black & white illustrations
  • 1236877764
  • 9781236877765