602 CHARLES S. PROSSER 
Fic. 4.—Fall on Slate Run showing entire thickness of Berea sandstone with 
Sunbury shale above and Bedford shale below. Each contact indicated by a hammer. 
Photograph by W. C. Morse. 
Fic. 5.—Entire thickness of Berea sandstone, with Sunbury shale above and 
Bedford shale below, on northern bank of Slate Run. Upper contact indicated by 
hammer. Photograph by C. S. Prosser. 
