Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
| www.biodiversitylibrary.org
Transcription
7/11/94 2JH9413
TRAVERSE TO The PROMINENT
POINT IN SE, SEC 31, T
23N, R18E, Fergus Co., MT.
Judith River FM.
Base is a SS about
2750' contour
abt 10-15 m. Thick.
above this SS is a
carbonaceous layer prob.
representing the back-
barrrier marsh then a
sequence of mudst, siltst,
Thin SS , w channels
rooted Inceptisols,
Thin ligmite.
pour scraps of plants
are rare.
Top of JB supposedly marked
by oyster bed. This occurs
at 3250' making J.B
500' Thick.