Klappentext
Excerpt from West Virginia Geological Survey, Logan and Mingo Counties, Vol. 4: Paleontology
Upper Freeport Coal The Bolivar Fire Clay Upper Freeport Sandstone Lower Freeport Coal Lower Freeport Sandstone The Upper Kittanning Coal The East Lynn Sandstone The Middle Kittanning Coal The no. 5 Block Coal The Clarion Coal..
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