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 326.90000 to 72.20000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Chesterian335.4 - 323.4USA (Montana) (136169 157238)
Serpukhovian330.3 - 323.4USA (Montana) (154744)
Arnsbergian326.9 - 323.6USA (Montana) (90681 116654 116655 116656 116657 116658 116659 116660 116762 116763 116764 130890 226838 227056 227060 227061 227064 227065 227066 232617 232618 232644)
Early/Lower Campanian83.6 - 72.2Canada (Alberta) (82650 82651 82652 82653 82654)