Excerpt from Bulletin United States Geological Survey, Issue 286, 1906
The field work on the area covered in this report was begun early in July, 1902, and continued throughout the summer. Early in September Mr. M.I. Goldman joined the writer and assisted in the areal mapping for one month. During the following winter the instrumental results were found to be too much in error for drawing structural contours at 20-foot intervals. Consequently in the spring of 1903 the field was again taken by the writer and Mr. F. G. Clapp, and the elevations on outcrops of the key strata previously determined by aneroid were checked by level. The results were surprising and gratifying. The larger part of this work was accomplished by Mr. Clapp, who also collected other geologic data and several hundred records of wells in Beaver and Allegheny counties. In August, 1903, the writer was transferred to western work, and his time has since been divided between two areas. The engraved topographic map of the Beaver area was finished in March, 1904. In the summer of 1904 Mr. Clapp spent a few days in obtaining special information on the clay industries of Beaver quadrangle. This data has by correspondence been brought up to date (May, 1905), and enlarged so as to cover most of Beaver County.
From Mr. M. R. Campbell, geologist in charge of fuels and other natural hydrocarbons, the writer has received such oversight and criticism as makes mention of gratitude here totally inadequate. The preparation of the report has been facilitated by various courtesies of the oil, gas, and clay companies operating in this region. Special acknowledgment is due to Mr. R. R. Hice, of the Fallston Fire Clay Company, a member of the Pennsylvania Topographic and Geologic Survey Commission, for data on the New Sheffield gas field and other valuable information.
The Beaver quadrangle is located in western Pennsylvania, with its western boundary about 1 mile from the Ohio State line. The whole area, except the southeast comer, which includes a triangular portion of Allegheny County, lies in Beaver County, and through its middle in a general westerly direction flows Ohio River. Near the junction of Ohio and Beaver rivers is situated the town of Beaver, which gives its name to the quadrangle. The quadrangle extends from latitude 40 So on the south to 40 45 on the north, and from longitude 80 15 on the east to 80 30 on the west, including one-sixteenth of a square degree of the earths surface, or an area of about 227 square miles.
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