Key to maps X, Coal mine adit, working or abandoned direction of main (strike) heading P X Pit or prospect in coal c Coal outcrop (in field or woods) or - .... if continuous for any distance Road cuts X Approx. crop of coals in sections between adjacent drill holes. marine fossils in root shale coal crop or smut or blossom. black shale fossiliferous (marine) shale red beds (or ////// in fields) sandstone iron-pellet clays (generally weathered red-bed horizons) Flint clay Plastic clay c clay sample CB-5 [illegible] test pit in clay or coal seeps - restained or oily phi coaly wash. Trace of coal seams Harlem Lower Bakerstown Brush Creek Upper Freeport Upper K1 Hanning Others U.S.B.M. Proj. 823 D.D.H's Foreign (deep) D.D.H's (Churn it C in circle.)