Hiranita Formation
Geology
Group: Chichibumachi
Members: unnamed (2)
Lithologies: not reported (2)
Paleoenvironments: marine indet. (2)
Age range: Langhian or 15.98000 to 13.82000 Ma
Collections
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Langhian | Japan (Saitama) | (171618) | |
| Middle Miocene | Japan (Saitama) | (220509) |