Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
| www.biodiversitylibrary.org
Transcription
Clay in upper (Dakota?) beds is thin and
silty. Definitely more than one bed. Trace
on photo approximates position of these.
No clay worthy of note.
stratig. - Both 1st & 3rd sandstones thick.
1st has persistent chert-qtz cqltc coarse ss.
at base. Discont. exposed (poorly) only at
N end of hotback.