火山岩
5.According to the characteristics and time-space distribution of volcanics, two relatively high-grade volcanic divisious are classified, that is, volcanic region the first grade, and volcanic belt the second grade.
7.In total 6 volcanic regions and 30 volcanic belts are subdivided in Xinjiang.
9.THE BASIC CHARACTERISTICS OF CAMBRIAN MARINE VOLCANIC ROCKS IN THE NORTHERN QILIAN MOUNTAINS

