Volcanic caves mainly are lava tube type?pyrodastic type cave and volcanic-intrusive cave,with different genetic mechanism and high value of tourism.
火山洞穴主要是指火山熔岩型洞穴 ,除此之外 ,还有构造 -差异风化洞穴和火山侵入岩崩塌堆叠型洞穴。
It is consisted of basalt lava (including massive basalt,porphyritic basalt,and amygdaloidal basalt),py- roclastic-lava,volcanic breccia and tuff.
对中坝址出露地层进行分析,主要为峨眉山玄武岩系第三到第六岩性段,由火山熔岩类、火山碎屑熔岩类、火山碎屑岩类和沉积火山碎屑岩类所组成。
