Field notes, Ohio, undated, 2 volumes
Page 137
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Transcription
N.D. Collinville, this 4½ mi. My ford bridge - 1 mi. My thr 10½ ft up 2nd dim change from coarse gritty arg. siltstone to fine biddled clay shales above 54½ ft up above same D.in retusac. 25¾ft up, pure river clay with graptolites. 6½ ft up - Cyclonema fluctuosa 4½ ft interval, Plat. lgy & Septaria at same levels; N.W. 5 7 jacksoning 12 mi. 16 ½ ft Bridge Siltwood 89 mi.