Mitten Black Shale Member

Geology

Group: Montana

Formation: Pierre Shale

Lithologies: "shale" (25), "limestone" (15)

Paleoenvironments: offshore (25)

Age range: base of the Early/Lower Campanian to the top of the Campanian or 83.50000 to 72.10000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Campanian83.6 - 72.1USA (Wyoming) (1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1731 1732 1733 1734 1735 1736 1738 1739 1740 1741 1730)
Early/Lower Campanian83.5 - 70.6USA (Wyoming) (1737 186542 186543)