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ckd08

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發表於 2011-12-16 04:18 AM | 顯示全部帖子 ::: 一按馬上把這個話題放上你的facebook!! :::
I wonder where is this sinkhole located because sinkhole usually happens on limestone, carbonated rock and salt beds.  However, why would they ask help from a volcanist instead of a geologist ?
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