Chappo Member

Geology

Formation: Wasatch

Lithologies: not reported (1), claystone (8), "shale" (1)

Paleoenvironments: terrestrial indet. (17)

Age range: base of the Tiffanian to the top of the Clarkforkian or 61.70000 to 54.90000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Tiffanian61.7 - 56.8USA (Wyoming) (14936 14940)
Clarkforkian56.2 - 54.9USA (Wyoming) (15075 15076 15077 15078 164513 164514 164515 164516 164517 164518 164519)
Graybullian55.8 - 50.3USA (Wyoming) (15875 15876 15877)
Wasatchian55.8 - 50.3USA (Wyoming) (15462)