Last Updated:2025/11/19
(uncountable, geology) A fine-grained homogeneous sedimentary rock composed of clay or volcanic ash which has been metamorphosed so that it cleaves easily into thin layers.
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Japanese Meaning
板岩 — 火山灰や粘土からなる細粒な堆積岩が変成して形成された岩石であり、薄い層に割れやすい性質を持つ
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( plural )