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黑龙江宝清、饶河地区含Monotis ochotica以砂页岩、中酸性凝灰岩为主的晚三叠世海相层,以前称为清江群,现为南双鸭山组。近年来,浑江小河口和汪清天桥岭晚三叠世陆相层的发现和研究影响较大。1978—1980年,吉林区调一分队于黑龙江省东南部与苏联毗邻的东宁、老黑山一带,在大片火山岩夹层中,发现以Cycadocarpidium-Taeniopteris为特征的晚三叠世植物组合,证明黑龙江省东南部存在着以火山岩为内容的晚三叠世陆相
Heilongjiang Baoqing, Raohe area with Monotis ochotica sand shale, tuff-based late Triassic marine layer, formerly known as Qingjiang Group, is now South Shuangyashan formation. In recent years, the discovery and research of the late Triassic continental strata in the Hunjiang Creek mouth and Wangqing Tianqiao Ridge have a great impact. From 1978 to 1980, Jilin District transferred a unit to the late Triassic plant assemblage characterized by Cycadocarpidium-Taeniopteris in a large volcanic interlayer in the northeastern part of Heilongjiang Province, adjacent to the Soviet Union in the area of Dongning and Old Montenegro. It proved that Heilongjiang Province There are late Triassic continental facies in the southeastern part of the volcano