Notes |
1985 reprinting of 1975 map and 3 cross-sections. "MAP 42, 1975, Reprinted 1985." "1927 North American datum." Relief shown by contours. "Compiled in 1971 from USGS quadrangles dated 1953-1969." "Prepared by the Pennsylvania Bureau of Topographic and Geologic Survey in cooperation with the U.S. Dept. of the Interior, Geologic Survey." Includes bibliographical references. Includes text, "Index map to source material," "Geologic column," and location map. Accompanied by 3 sheets of cross-sections. |