Sanchu Group

Geology

Formations: Ishido (6), Sebayashi (7)

Lithologies: not reported (1), mudstone (1), "shale" (3), sandstone (9), conglomerate (1), "limestone" (1)

Paleoenvironments: marine indet. (5), terrestrial indet. (1), shallow subtidal indet. (1), marginal marine indet. (2), estuary/bay (3), delta plain (1)

Age range: base of the Barremian to the top of the Early/Lower Albian or 125.77000 to 110.10000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Late/Upper Hauterivian - Early/Lower Barremian132.6 - 121.4Japan (Gunma) (97938)
Barremian125.77 - 121.4Japan (Gunma) (126288 229065)
Barremian125.77 - 121.4Japan (Nagano) (91351)
Barremian125.77 - 121.4Japan (55537 55538 55539 55540 55541)
Late/Upper Barremian - Aptian125.77 - 113.2Japan (Gunma) (87522)
Late/Upper Barremian - Aptian125.77 - 113.2Japan (Honshu) (50307)
Early/Lower Aptian121.4 - 119.57Japan (Gunma) (67143)
Early/Lower Albian113.2 - 110.1Japan (Gunma) (13336)