Congressional Edition Volume 6414

Congressional Edition Volume 6414

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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. 1913 edition. Excerpt: ...utilized in Delaware, and it is doubtful if future exploration of the deposits of this age will result in the discovery of any important clay beds except those in the Raritan formation. TERTIARY CLAYS. The Tertiary formations of Delaware are not important sources of clay, because, with the exception of the Lafayette, the beds are composed largely of sand and greensand marls. For this reason it is as a rule not advisable to seek clay in any of the formations of Eocene or Miocene age, though in places such deposits exist in the form of thin beds. The deposits of the Lafayette formation are largely sand and gravel but contain some thin layers of clay that might be suitable for the manufacture of common brick, though too sandy for the manufacture of brick of the better grades such as are used for ornamental work. At various places on the upland there is a thin layer of yellow or gray loam that may possibly belong in part to the Lafayette. This loam is comparatively free from grit and is suitable for making both common and pressed brick. It is sufficiently plastic to be molded by the stiff-mud process and would doubtless be satisfactory for the manufacture of draintile and similar clay products. QUATERNARY CLAYS. The Quaternary formations are widely distributed in Delaware and have furnished brick clays at many localities. In fact, nearly all the brickyards of the State, with the exception of one at Christiana, use clay from some one of the Quaternary formations. While there is a wide variation in the character of these clays from place to place, they are nearly all suitable for the manufacture of ordinary building brick or draintile, and in a few localities they might be utilized for making pressed brick. CLAYS OP SUNDERLAND FORMATION. The...
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Product details

  • Paperback | 160 pages
  • 189 x 246 x 9mm | 299g
  • United States
  • English
  • black & white illustrations
  • 123688745X
  • 9781236887450