Last Updated：2025/11/24

(geology) Sedimentary rock composed of fine clay particles. / One of the concretionary nodules in alluvial deposits.

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claystone

Source Word

claystone

countable uncountable

(geology) Sedimentary rock composed of fine clay particles. / One of the concretionary nodules in alluvial deposits.

Japanese Meaning

細かい粘土粒子から形成される堆積岩（粘土岩） / 河川堆積物などに現れる結節状の塊（結節岩の一種）

Geologists discovered a thin layer of claystone beneath the river delta.

地質学者たちは河川の三角州の下で薄い粘土岩の層を発見した。

Sense（1）

(geology) Sedimentary rock composed of fine clay particles.

Sense（2）

One of the concretionary nodules in alluvial deposits.

claystones

（ plural ）