Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
| www.biodiversitylibrary.org
Transcription
7812 Hell Hollow
1st stop
Center, W bdy sw 1/4, NE 1/4, sec 36, T 21 N, R 35 E, GAA FIELD CO. MONT.
Hell Creek Fm - abt 30' below position of Z coal
Tan + brown pop corn crust poorly defined bedding
Fewer siderite cones. Superficially similar ones appear to be sandier + mostly to lack the Alligator kinds of the we in the Tullock Mbr
Some Sid cones.
Basal Tullock between z & z 'verigated beds of Dave Archibald