Field Notebook: Minnesota, Wisconsin, Iowa, Illinois, Pennsylvania
Page 57
Image from the Biodiversity Heritage Library. Contributed by Yale Peabody Museum of Natural History. | www.biodiversitylibrary.org
Transcription
"After dinner drive to the Big Springs and then to Allen Shuntel quarry. These horizons in Trenton limestone with some thin bands of shale. Clearer the springs than the Hunt quarry is while I found that little species of Terebratula and these are also in the Trenton limestone. The springs come out just above the green shale. From this level to the general level of the county is at least 125 feet, the thickness of the galena. About four o'clock started for Kykoff!"