Koum Formation

Geology

Members: Grés de Gaba (5), Mbissirri (4)

Lithologies: mudstone (6), sandstone (5), conglomerate (1)

Paleoenvironments: fluvial indet. (4), channel lag (1), "floodplain" (4)

Age range: base of the Cautleyan to the top of the Albian or 449.20000 to 100.50000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Katian452.8 - 445.2China (Qinghai) (276235)
Ashgill449.5 - 443.1China (Gansu) (23586 23589)
Ashgill449.5 - 443.1China (GanSu) (8559)
Cautleyan - Rawtheyan449.2 - 445.2China (QingHai) (8678)
Cautleyan - Hirnantian449.2 - 443.1China (GanSu) (8569)
Aptian - Albian121.4 - 100.5Cameroon (Nord) (38917 38918 52673 99706 118068 118069 118070 118071 118072)