851-6 Dark gray silty to sandy clay 869 Fine grained sandstone intercalated siltstone + silty claystone. stylolites at base Bottomed 869 Notes on Clays 1) Mottled gray fragmental semiplastic-semiflint from 592-594 is about at Upper Freeport horizon. Sent for test to see if its type was good grade. No commercial bodies can be expected at this horizon. (Anal. #1) 2) Note - Lower Bakerstown underclay with obvious impurities in this hole. 3) Mahoning horizon represented by fragmental clay at 527' (CB16)