Tongue River Member

Geology

Formation: Fort Union

Lithologies: not reported (12), "siliciclastic" (4), claystone (3), sandstone (1), coal (1)

Paleoenvironments: terrestrial indet. (15), fluvial indet. (4), wet floodplain (3)

Age range: base of the Tiffanian to the top of the Paleocene or 61.70000 to 56.00000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Danian66.0 - 61.6USA (North Dakota) (14962)
Paleocene66.0 - 56.0USA (Wyoming) (31006 31219 31220)
Paleocene66.0 - 56.0USA (Montana) (53690 53845 53953 53955)
Torrejonian63.8 - 60.9USA (Montana) (14876 176690 176691 176692 176693 176694)
Tiffanian61.7 - 56.8USA (North Dakota) (14932 14946 14966 15006)
Tiffanian61.7 - 56.8USA (Montana) (14937 15047 15048)
Clarkforkian56.2 - 54.9USA (Montana) (137834)