Beaver Bay Group

Geology

Formations: Stepovak (4), Tolstoi (2)

Lithologies: "shale" (1), siltstone (2), sandstone (5), conglomerate (3)

Paleoenvironments: marine indet. (6)

Age range: base of the Middle Eocene to the top of the Oligocene or 48.07000 to 23.04000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Middle Eocene48.07 - 37.71USA (Alaska) (44096 44097)
Oligocene33.9 - 23.04USA (Alaska) (44081 44082 44083 44084)