Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
| www.biodiversitylibrary.org
Transcription
Cannonball:- Lower shale member
and "greensand" members
present in section. Shales
grade into fossiliferous buff
S.S. capped by eroded cone,
layer. Greensand above has
2 barren cone, goes in it.
Cones in this zone flat ellipsoidal
'alamasau' type common in
upper Pierre + transition beds.
Holomeraite in 'greensand'