The Shenango Formation (Mississippian) in northwestern Pennsylvania Kimmel, Grant E. creator author. Schiner, George R. 1926- author. Geological Survey (U.S.) issuing body. Pennsylvania Bureau of Topographic and Geologic Survey, sponsoring body. text bibliography dcu 1970 monographic eng remote 1 online resource (13 pages) : illustrations. by Grant E. Kimmel and George R. Schiner ; prepared in cooperation with the Pennsylvania Topographic and Geologic Survey. Title from title screen (viewed September 15, 2014). Includes bibliographical references (page 13). n-us-pa Geology Pennsylvania Geology, Stratigraphic Mississippian Geology Geology, Stratigraphic Mississippian Geologic Period Pennsylvania From 310 to 345 million years ago fast I 19.3:1294-C I 19.3:1294-C Shenango Formation (Mississippian) in northwestern Pennsylvania Kimmel, Grant E. (OCoLC)4032423 Geological Survey bulletin ; 1294-C Contributions to stratigraphy https://purl.fdlp.gov/GPO/gpo70158 COP 140926 20211120174611.0 in00003718059 eng