conformably
31Beaverhill Lake Group — Stratigraphic range: Middle to Late Devonian 390–365 Ma …
32Clearwater Formation — Stratigraphic range: Albian …
33Woodbend Group — Stratigraphic range: Frasnian …
34Debolt Formation — Stratigraphic range: Meramecian …
35Smoky Group — Stratigraphic range: Late Cretaceous …
36Dunvegan Formation — Stratigraphic range: Cenomanian …
37Saskatchewan Group — Stratigraphic range: Frasnian …
38Muskiki Formation — Stratigraphic range: Late Cretaceous …
39Muskwa Formation — Stratigraphic range: Frasnian …
40Nonesuch Shale — The Nonesuch Shale is a Proterozoic geologic formation that outcrops in Michigan and Wisconsin, United States, but has been found by drill holes to extend in the subsurface as far southwest as Iowa. The Nonesuch is a lacustrine sequence of shale …