Last Updated:2025/11/29

During the field survey, the geologist identified layers of pea ore embedded in the shale.

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During the field survey, the geologist identified layers of pea ore embedded in the shale.

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野外調査で、地質学者は頁岩に埋まる豆粒大の球状粒子を成す粘土質酸化鉄の層を確認した。

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