Field Notebook: Ontario 1912
Page 71
Image from the Biodiversity Heritage Library. Contributed by Yale Peabody Museum of Natural History. | www.biodiversitylibrary.org
Transcription
In walking around to the east of Theading this afternoon I was struck with the low relief of the county which is decidedly undulating. The high lands are ridges and the one that runs north and south 3 miles east of Theading is capped by one of limestone not more 5th foot thick. Beneath this limestone come the Hachiford shales and then they are followed by fine unprofitable shale and these by another dense limestone about four feet thick. These shales are not thicker than 30 feet. Below the limestone occur one soft unprofitable blue shale used for brick and tile grading = the Lorne Hamilton Shales. That seen today is all over 15 feet thick.