Hioki Group
Geology
Formations: Kiwado (1), Taoyama (2)
Lithologies: not reported (2), sandstone (1)
Paleoenvironments: marine indet. (2), terrestrial indet. (1)
Age range: Late/Upper Oligocene or 27.30000 to 23.04000 Ma
Collections
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Chattian | Japan (Yamaguchi) | (127693) | |
| Late/Upper Oligocene | Japan | (183066) | |
| Late/Upper Oligocene | Japan (Yamaguchi) | (190897) |