Lower Chedao Member

Geology

Formation: Chedao

Lithologies: "shale" (1), "limestone" (1)

Paleoenvironments: marine indet. (1)

Age range: base of the Costonian to the top of the Harnagian or 458.20000 to 457.20000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Costonian - Harnagian458.2 - 457.2China (GanSu) (8551)