"D4683 Going south-east for 3 miles along the Madison railroad one first encounters the Ohio Shale shale and then at least 75 feet of Devonian limestone down to the streambed. Along the track one sees much widma of very crocted magnesium limestone. The beds or distiguishes are the silten limestones in large bks. The openings of the croctls are from 1/4 to 1/2 incht. The joints from 4 to 8 inches. In going to Madison we again saw the Ohio shale about 4-5 miles south-east and again a little further along. In those places it seems to reprove on the Silajaran.. If this is or the rule of silo indicates an erosional unconformity, The Devonian rocks are in a very uncrm county. But once on the Silajaran rocks the county is again flat and remains so almost to North Orkadian at the edge of the cliff to the river level. Staying at the Madison Hotel. C9222