Upper Yezo Group

Geology

Formations: unnamed (19), Haborogawa (1), Hobetsu Shale (1), Osoushinai (1), Regosawa (1), Upper Haborogawa (1), Urakawa (20)

Lithologies: not reported (3), claystone (20), mudstone (19), siltstone (1), sandstone (1), "limestone" (1)

Paleoenvironments: marine indet. (22), offshore (1), basinal (siliciclastic) (21)

Age range: base of the Coniacian to the top of the Campanian or 89.80000 to 72.10000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Coniacian89.8 - 86.3Japan (Teshio) (40122)
Coniacian89.8 - 86.3Japan (Iburi) (40313)
Coniacian89.8 - 86.3Japan (39903 233827)
Coniacian89.8 - 86.3Japan (Hokkaido) (96027 96028 96029 96030 96031 96032 96033)
Coniacian89.8 - 86.3Japan (Ishikari) (39824)
Coniacian89.8 - 86.3Japan (Hidaka) (40587)
Coniacian - Santonian89.8 - 83.6Japan (Hokkaido) (91354)
Coniacian - Campanian89.8 - 72.1Japan (40614)
Santonian86.3 - 83.6Japan (39904)
Santonian86.3 - 83.6Japan (Teshio) (40126)
Santonian86.3 - 83.6Japan (Ishikari) (39825)
Santonian86.3 - 83.6Japan (Hokkaido) (95788 96034 96035 96036 96037 96038 96039 96040 96041 96042)
Santonian86.3 - 83.6Japan (Hidaka) (40588)
Santonian86.3 - 83.6Japan (Iburi) (40314)
Santonian - Campanian86.3 - 72.1Japan (Teshio) (40653 234037)
Late/Upper Santonian - Early/Lower Campanian85.8 - 70.6Japan (Hokkaido) (115409)
Campanian83.6 - 72.1Japan (39902)
Campanian83.6 - 72.1Japan (Ishikari) (39826)
Campanian83.6 - 72.1Japan (Hokkaido) (94128 94135 96043 96044 96045 96046)
Campanian83.6 - 72.1Japan (Hidaka) (40589)
Campanian83.6 - 72.1Japan (Teshio) (39821)
Early/Lower Campanian83.5 - 70.6Japan (Hokkaido) (152095)