Quaternary
Holocene
Pleistocene Abag Formation A’ershan Formation
Neogene
Pliocene
Miocene
Paleogene
Oligocene
Eocene
Paleocene A’ertashi Formation
Cretaceous A’ergong Formation
Late (Upper)
Early (Lower) Dabeigou Formation Jianxing Formation Jiufotang Formation Tuchengzi Formation Xiagou Formation Yijinholuo Formation Yixian Formation
Jurassic
Late (Upper) Shaximiao Formation Suining Formation Tiaojishan Formation
Middle Ah Formation Haifanggou Formation
Early (Lower) Lufeng Formation
Triassic
Late (Upper) Adula Formation
Middle
Early (Lower) Aba Formation Zuosuo Formation
Paleozoic
Permian
Late Zuozuo Formation
Middle
Early A’erbasayi Formation A’ertushileike Formation Beipiao Formation
Carboniferous
Late Jianshanying Formation
Middle
Early
Devonian
Late (Upper)
Middle A’ermantie Formation
Early (Lower) A’ertaxi Formation Xikeng Formation
Silurian
Late Xikeng Formation Zusailing Formation
Middle
Early
Ordovician
Late (Upper)
Middle
Early (Lower)
Cambrian
Late (Upper)
Middle Abuqiehai Formation Zushimiao Formation Wulongqing Formation Chiungchussu Formation
Early (Lower)
Kuanchuanpu Formation Yanjiahe Formation
Proterozoic
Neoproterozoic Abor Formation Lantian Formation Doushantuo Formation
Mesoproterozoic Gaoyuzhuang Formation Tuanshanzi Formation
Paleoproterozoic Chuanlinggou Formation A’ertenghala Formation Xiheli Formation
Archean
Neoarchean Xihui Formation
Mesoarchean
Paleoarchean
Eoarchean
References