谁知道呢，你可能甚至会在乱石碎砾中找到钻石。
And who knows, you might even uncover a diamond in the rough.
关于底砾层的成因问题，有多种观点。
There are many viewpoints about the genesis of the "bottom gravel".
与熔岩呈过渡的火山碎屑岩主要为角砾熔岩和集块熔岩。
The second rock is mainly breccia lava and conglomerate lava.
与熔岩呈过渡的火山碎屑岩主要为角砾熔岩和集块熔岩。
The second rock is mainly breccia lava and conglomerate lava.
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