The Hell Creek Formation - Fossil Ecosystems of North America: A Guide to the Sites and their Extraordinary Biotas - page 162

166

166 Diagram to show the stratigraphy
of the Upper Cretaceous succession of
the Williston Basin after Hartman,
2002.

Eastern
Williston Basin

Member-
Lithofacies

West East

Sentinel Butte
Member
Tongue River
Member

Cannonball
Member

Ludlow

T
K

Member

Breien
Member

Linton
Member

Colgate
Lithofacies

Bullhead
Lithofacies

Timber Lake
Member
Trail City
Member