Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
| www.biodiversitylibrary.org
Transcription
St. Albans July 9, 1922: Sunday.
Dayles wanted to see the Highgate Falls section once more and so we all started for it at 9.30. I concluded to work out the section in more detail. Beginning at Highgate Falls and going down stream the section is as follows:
Section of the Upper Cambrian along the north shore of the Mississippi River from the bridge over Highgate Falls down stream. Under the bridge here is an anticline and the section is down the west limb.
Chilton formation. Section from old to young beds.
Heavy bedded dol, creating Falls. Center of arch, 15' seen. Unfossilized. Pink slatey dol. 15'
Heavy bedded dol. 50 feet, may be 70 feet
Black slatey dol. Dolgy. 3'
Heavy bedded blue-grey conglomeratic (intrusn.) dol. 5'
Black micaceous slate 6"
Heavy bedded sandy grey emply. dol. 10'
Laminated sandy dol. 4'
Black slatey dol. 6"
Grey emply. dol. 1'
Black slatey dol. 4'
Grey emply. dol. 14"