A Formation

Geology

Group: Hakobuchi

Members: unnamed (1)

Lithologies: mudstone (1)

Paleoenvironments: basinal (siliciclastic) (1)

Age range: base of the Campanian to the top of the Early/Lower Campanian or 83.60000 to 72.20000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Early/Lower Campanian83.6 - 72.2Japan (Hokkaido) (95789)
Campanian - Maastrichtian83.6 - 66.0Japan (Iburi) (40337)