Image from the Biodiversity Heritage Library.
Contributed by Smithsonian Institution Archives.
| www.biodiversitylibrary.org
Transcription
1" chert ==
1" rock
1/2-1" chert ==
13" rock
2 1/2 - 3" chert =
15" rock
2" chert ==
4' 2" quarried rock
for use
Quarry,
6 ft rock including 14 in thick layer
at bottom. One lower part may
be taken to represent Dayton stone
11' 4" Clinton rock reddish brown
8" Cincinnati ledge
blue clay.
12
11
12 12
132
8
135