最終更新日：2024/08/06

(colloquial) A sandstone, shale, or mudstone that forms in layers that are easily split into flagstones.

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calmstone

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calmstone

noun

(colloquial) A sandstone, shale, or mudstone that forms in layers that are easily split into flagstones.

I found a beautiful calmstone on the beach.

意味（1）

(colloquial) A sandstone, shale, or mudstone that forms in layers that are easily split into flagstones.