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桂北宝坛地区分布着华南古老的花岗岩体。根据岩石类型,可分为两类:一为中酸性岩体,包括本洞、龙有、峒马、蒙洞口、才滚、塘村等岩体;第二类为规律较大的斑状花岗岩、斑状二长花岗岩体,包括三防、元宝山、平英、田蓬、清明山等岩体。其中第二类
Baotian in Guangxi area is distributed with ancient granite bodies in southern China. According to the rock type, it can be divided into two types: one is a medium-acidic rock body, including the rock, dragon, geomao, Mengdongkou, Caoban, Tangcun and other rock masses; the second is the macular- Porphyry monzonite granite body, including the three defenses, Yuanbaoshan, Ping Ying, Tian Peng, Qingming Hill and other rock. The second category