The porphyroclastic lava in Chaihe, Daxinganling region was found in recent years during the 1∶50 000 regional geological survey. Late Jurassic volcanic rocks of Manketouebo, Manitu and Baiyingaolao formations are developed in the Ershisidaogou, Aonier-Sidaogou and Chaihe-Gulihe volcanic erupted basins. The Gulihe porphyroclastic lava body, occurring as an oval dome extending in northeast direction, can be divided into internal facies (porphyritic), transitional facies (felsitic) and external facies (hyaline). The porphyroclastic lava in Aonier, trending in east-west, can be recognized in two or three facies. The lava bodies are composed of mainly rhyolitic lava, formed in the late stage of Baiyingaolao volcanism.