尖岭组主要由粘土岩、粉砂岩、含砾粉砂岩、岩屑粉砂岩组成,底部为含砾砂岩或砾岩、岩屑砂岩。下部含笔石:Normalograptus brevis,Glyptograptus euglyphus,Nemagraptus sp.等;三叶虫:Birmanites cf. hupeiensis;腕足类:Zanclorhyncha sp.,Protozyga nasuta等;上部产腕足类:Mimella,Sowerbyella;双壳类:Paraphthonia,Tancrediois;鹦鹉螺:Michelinoceras sp.,Westonoceras sp.,Eurasiaticoceras sp.;三叶虫:Ampyxinella sp.,Remopleurides sp.。上与甘沟村组、下与榆红组均为整合接触。厚598-968米。