Where Can Igneous Rocks Be Foundに関する深掘り解説を分かりやすく解説いたします。

You will not find igneous rocks in places with a lot of limestone or chalk, like the White Cliffs of Dover. That’s biological stuff—old sea creatures. Not our fiery friends.

Also, don’t look for them in your bathtub. Unless you have a very weird plumbing system. Or you brought a rock with you. In which case, stop, you weirdo.