Bear Gulch Member

Geology

Group: Big Snowy

Formation: Heath

Lithologies: lime mudstone (1), "limestone" (24)

Paleoenvironments: shallow subtidal indet. (1), open shallow subtidal (5), lagoonal/restricted shallow subtidal (18), estuary/bay (1)

Age range: base of the Arnsbergian to the top of the Early/Lower Campanian or 327.00000 to 70.60000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Chesterian335.5 - 323.2USA (Montana) (136169 157238)
Serpukhovian330.9 - 323.2USA (Montana) (154744)
Arnsbergian327.0 - 323.7USA (Montana) (90681 116654 116655 116656 116657 116658 116659 116660 116762 116763 116764 130890 227056 226838 227060 227061 227064 227065 227066 232617 232618 232644)
Early/Lower Campanian83.5 - 70.6Canada (Alberta) (82650 82651 82652 82653 82654)