Image from the Biodiversity Heritage Library.
Contributed by Smithsonian Institution Archives.
| www.biodiversitylibrary.org
Transcription
128 Carboniferous,
Devonian
Lower Silurian Upper Silurian
Town Helderberg
Hillsbor sandstone.
West Union st str,
Smelph Cedarville
Springfield
Niagara shale
Davyt m
Clinton
Cincinnati
Droit m
Black River
Chazy
Cambrian