主要岩石类型包括碳酸盐岩、沉积凝灰岩、矽质岩和石英砂岩。
The main kinds of rocks include carbonate rocks, tuffite, siliceous rocks and quartz sand - stone.
沉积岩有杂砂岩、粉砂岩、凝灰岩、泥质岩等。
The sedimentary rocks are graywacke, siltstone, tuff andpellitie, etc.
钙质或碳酸钙越近现代，所构成凝灰岩地层的沉积物越靠近底部，颜色也比较浅。
The more recent calcareous, or calcium carbonate, deposits that make up the tufa formations are closer to the bottom and lighter in color.
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