Coal Ridge Member

Geology

Group: Montana

Formation: Judith River

Lithologies: not reported (9), mudstone (1), siltstone (1), sandstone (1)

Paleoenvironments: terrestrial indet. (11), crevasse splay (1)

Age range: Late/Upper Campanian or 83.50000 to 70.60000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Late/Upper Campanian83.5 - 70.6USA (Montana) (14447 55274 156538 190394 230098 230102 231025)
Middle Campanian - Late/Upper Campanian83.5 - 70.6Canada (Saskatchewan) (14493 14494)
Middle Campanian - Late/Upper Campanian83.5 - 70.6USA (Montana) (46123 46124 206062)