Bulletin - United States Geological Survey Volume 309

Bulletin - United States Geological Survey Volume 309

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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. 1907 edition. Excerpt: ...passes directly north of the Union wells, in apparent continuation of the princpal anticline of the hills to the east. It lies considerably south of the point of greatest disturbance in the field, which is apparently in the immediate region of the New England wells. Farther west it possibly merges with the fold which appears south of the fault zone at the east end of the Whittier district. North of this fold are others, both anticlines and synclines, in one of which are the New England wrells and an isolated well of the Union Oil Company. The rocks along the axis of this fold show severe crushing, with indications of considerable displacement. At the head of the east fork of La Habra Canyon the structure again shows marked complexity. Sharp crumples, even faults, exist. The most conspicuous displacement is between the hills on either side of the road over the divide. The unconformity also is very marked, the line between the Fernando conglomerate and the siliceous shale of the Puente sweeping in a broad curve to the southern base of the hills and passing thence to the entrance to Walnut Canyon and the hills separating this from the entrance to Brea Canyon. Whether faults exist along this line is uncertain. North of the more conspicuous fracture the lower body of shale, beyond an interval of sharp minor folds, assumes a northerly dip, which is maintained by the succeeding formations to the northern limit of the hills. South of the fracture the shale, together with a small fragment of Puente sandstone, appears to lie in a sharp syncline, which is succeeded by an anti cline, but there is much confusion in the details of structure, and these have not been determined. The changes in structure so frequently encountered in the Puente Hills are..show more

Product details

  • Paperback | 110 pages
  • 189 x 246 x 6mm | 213g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236932870
  • 9781236932877