二连组,又名二连达布苏组(Iren Dabasu Formation)、青元岗组,是位于中国内蒙古二连浩特一带及黑龙江的上白垩世地层,1922年由Walter Granger、Charles P. Berkey命名。该地层以浅灰、浅灰绿色泥质砂岩、砂岩、砾砂岩、泥岩为主,间夹泥灰岩等。[1]
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