Chedao Formation

Geology

Members: unnamed (4), Lower (1), Upper (1)

Lithologies: "shale" (2), lime mudstone (3), grainstone (1), "limestone" (3)

Paleoenvironments: marine indet. (5), sand shoal (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
Llandeilo - Caradoc461.1 - 449.5China (Gansu) (20762)
Llandeilo - Caradoc461.1 - 449.5China (GanSu) (20763)
Costonian - Harnagian458.2 - 457.2China (GanSu) (8551)
Soudleyan - Marshbrookian458.2 - 454.0China (GanSu) (8550)
Sandbian458.2 - 452.8China (Gansu) (182201 182202)