Geological Survey Professional Paper Volume 623-624 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. Excerpt: ...parallels the 1,300-foot contour line on plate 1. In the creek bed at about the 1,420-foot contour (pl. 1)--near the section corner common to secs. 10 and 16--and extending downstream to about the 880-foot contour, a partial stratigraphic section of the Raging River Formation can be observed. (See description on p. 58.) A bed of medium-grained gray volcanic sandstone at an altitude of about 1,220 feet contains Cristispira pugetensis Allison, a turritellid. This species was also found, but in greater abundance, at locality 648 on the nose of the Raging River anticline, about 600 feet southwest of the center of sec. 15, T. 23 N., R. 7 E. Although the precise stratigraphic position of locality 648 is not known, it is probably at least 1,000 feet below the top of the formation. If C. pugetensis proves to have a narrow stratigraphic range, it may be possible to correlate its occurrences in stratigraphic section 3 and at locality 648. Moreover, if the C. pugetensis in stratigraphic section 3 is about 1,000 feet below the top of the formation, there must be several hundred feet of the upper part of the Raging River Formation missing, and the 700foot covered interval of stratigraphic section 2 must be represented by part of stratigraphic section 3. Farther southeast, part of the Raging River Formation is exposed in the channel of a tributary that flows across the NWV4 sec. 15, T. 23 N., R. 7 E. Dark-gray very fine grained volcanic sandstone crops out where the old logging road crosses the creek, at an altitude of about 1,260 feet, and the outcrop continues upstream to an altitude of about 1,360 feet. Below the road the bedrock is mostly concealed down to an altitude of about 1,030 feet, where an igneous sill is exposed. A second sill crops out at an altitude of about 96...