[請益] 關於變質岩易受侵蝕
上課的時候一直不能接受
變質岩明明就是再結晶的產物
結合能力理應比較強大 何故在低溫的時候就會容易受侵蝕
剛剛冷風一吹後才想到說似乎就相當一般石頭被凍裂的原理
但是石頭被凍裂是因為水流進裂隙凝成冰被撐開
那變質岩又是怎麼一回事呢??
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