まとめ
古代の熱帯雨林は3億5000万年前に存在していたことが,ミズーリ州古石岩の化石化した根の痕跡によって証明されています. これらの発見は,栄養素が少ない,湿った熱帯の土壌条件への初期の森林の適応を明らかにしています.
科学分野:
- パレオボタニーは古植物学です.
- 堆積地質学 堆積地質学とは
- パレオエコロジー (古生態学)
背景:
- パレオゾーイク・パレオカルスト・システムは,古代の陸上の環境に関するユニークな洞察を提供します.
- カオリン酸性粘土石は,気候が強い土壌の兆候であり,しばしば湿度の高い気候と関連しています.
研究 の 目的:
- パレオゾイク・パレオカスト内の化石の根の痕跡を調査する.
- ペンシルバニア中期の古環境と森林コミュニティを再建する.
主な方法:
- カオリン酸性粘土岩の地質学的地図作成と分析.
- 化石の根構造の古生物学的調査.
- パレオソールの気象変異の地化学分析.
主要な成果:
- 豊富な化石の根の痕跡が発見され,根のマットと深い木のような根が含まれています.
- 観察された植根パターンは,現代の熱帯雨林の植根パターンに似ています.
- パレオソールは,オリゴトロフ的条件の特徴である,最小の栄養基を持つ深い気象化を示します.
結論:
- 湿気のある気候のオリゴトロフ的,粘土質の基板に適応した森林コミュニティは,少なくとも3億5000万年前に存在した.
- この発見は,古生物学期に複雑な森林生態系が存在していたことを示唆している.
- パレオカルスト環境は,古代の植物や土壌の発達に関する重要な証拠を保存しています.
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