Science (New York, N.Y.)
|July 14, 1972
PubMed
まとめ

研究者らは,北ダコタ州のパレオセーン・リグナイトで,シリカ化された泥炭を発見した. この発見は,炭鉱期の石炭球のような植物構造の例外的な保存を提供し,古植物学の研究を支援しています.

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