縞状鉄鉱床
1. Banded iron formationBanded iron formations (also known as banded ironstone formations or BIFs) are distinctive units of sedimentary rock that are almost always of Precambrian age. A typical BIF consists of repeated, thin layers of iron oxides, either magnetite (Fe3O4) or hematite (Fe2O3), alternating with bands of iron-poor shale and chert. Some of the oldest known rock formations, formed over 3,700 million years ago, include banded iron layers.
Read “Banded iron formation” on English Wikipedia
Read “縞状鉄鉱床” on Japanese Wikipedia
Read “Banded iron formation” on DBpedia
Read “Banded iron formation” on English Wikipedia
Read “縞状鉄鉱床” on Japanese Wikipedia
Read “Banded iron formation” on DBpedia
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