Harrell Formation

Geology

Members: Tully (3)

Lithologies: claystone (1), "shale" (1), siltstone (1)

Paleoenvironments: marine indet. (3)

Age range: Givetian or 387.95000 to 382.31000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Givetian387.95 - 382.31USA (Pennsylvania) (9884 9885 9910)