Chichibumachi Group

Geology

Formations: Hiranita (1), Nagura (4)

Lithologies: not reported (5)

Paleoenvironments: marine indet. (1), reef, buildup or bioherm (4)

Age range: Langhian or 15.97000 to 13.82000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Burdigalian - Langhian20.44 - 13.82Japan (Saitama) (56956 133498)
Langhian15.97 - 13.82Japan (Saitama) (54183)
Middle Miocene15.97 - 11.608Japan (Saitama) (56955 220509)