现已扩大原色哇组的含义,包含前人的曲色组。岩性为石英砂岩、泥岩、灰岩、泥灰岩不等厚互层。含菊石:Witchellia sp.,Dorsetensia sp.,Sonninia(S.) propinguans,Zetoceras sp.,Fontannesia sp.,Pseudotoites sp.,Megalytoceras sp.,Stephanoceras sp.,S. cf. wangen,Shirbuirnia cf. buo公里an,Kumatostephanus sp.,Pelekodites sp.,Emileia sp.等及双壳类:Parvamussium cf. pumilum,Camptonectes(C.) punctatus,Liostrea cf. acuminata,Pseudolimea duplicata