Izumi Group

Geology

Formations: unnamed (7), Hiketa (2), Kita-Ama (2), Kita-ama (1), Kokawa (1), Matsuo (1), Minato, Azenotani & Shichi Shale, Kitaama Sandstone, Yoroizaki Sandstone (1), Minato, Azenotani, Kitaama & Shichi Shale, Shimonada Siltsone, Yoroizaki Sandstone (1), Mutsuo (2), Nakato Shale (1), Seidan (1), Shimonada (3), Shimonada Siltstone and Sandstone & Kitaama Sandstone and Shale (1), Shimonada siltstone & Kitaama Sandstone (1), Shindachi (1), Shintachi (1), Tsubasayama Sandstone (1)

Lithologies: not reported (11), "siliciclastic" (4), mudstone (2), "shale" (9), siltstone (3), sandstone (10)

Paleoenvironments: marine indet. (28)

Age range: base of the Campanian to the top of the Maastrichtian or 83.60000 to 66.00000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Campanian83.6 - 72.2Japan (Kagawa) (40170 40255)
Campanian83.6 - 72.2Japan (Osaka, Wakayama) (39905)
Campanian83.6 - 72.2Japan (Wakayama) (39967 236691)
Campanian83.6 - 72.2Japan (Ehime) (40325)
Campanian83.6 - 72.2Japan (Hyogo) (39575)
Campanian83.6 - 72.2Japan (40167)
Campanian83.6 - 72.2Japan (Fukui) (40162)
Late/Upper Campanian83.6 - 72.2Japan (Kagawa) (119011 230990 235741)
Late/Upper Campanian83.6 - 72.2Japan (Ehime) (161436)
Late/Upper Campanian83.6 - 72.2Japan (Hyogo) (119012)
Late/Upper Campanian83.6 - 72.2Japan (166255)
Campanian - Maastrichtian83.6 - 66.0Japan (185019)
Early/Lower Maastrichtian72.2 - 66.0Japan (Osaka) (119017)
Early/Lower Maastrichtian72.2 - 66.0Japan (185017 185018)
Early/Lower Maastrichtian72.2 - 66.0Japan (Hyogo) (119013 119014 119015 176812)
Maastrichtian72.2 - 66.0Japan (Osaka, Wakayama) (39906)
Maastrichtian72.2 - 66.0Japan (1396 185020)
Maastrichtian72.2 - 66.0Japan (Hyogo) (39576)
Maastrichtian72.2 - 66.0Japan (Wakayama) (119019)
Maastrichtian72.2 - 66.0Japan (Osaka) (119016 119018)