プレカンブリア時代後期に生じた藻類の化石,高塩素のラグーン
Science (New York, N.Y.)
|July 27, 1979
まとめ
オーストラリアの原始藻類の微生物化石.
科学分野:
- パレオントロジー・パレオントロジー
- 地質学 地質学 地質学
- 微生物学 微生物学とは
背景:
- オーストラリア中部のビッター・スプリングス・フォーメーションには,プロテロゾーイク時代の堆積岩が含まれています.
- リングウッドの蒸発石のような蒸発石の堆積は,特定のパレオ環境条件を示しています.
研究 の 目的:
- リングウッドの蒸発性堆積物からの藻類の微生物の集積を分析するために.
- ギレン・メンバ・ラグーンの古生物学環境条件を評価する.
- ストラティグラフィック相関に関するプロテロゾイク期の微生物群の有用性を評価する.
主な方法:
- 有機的に保存された藻類の微生物化石の分析.
- 化石の大きさ,多様性,および相性に関する調査.
- ビター・スプリングス・フォーメーション内の他の化石集合体との比較.
主要な成果:
- 微生物化石は小さく,多様性が低く,プロカリオットである可能性が高い.
- これらの特徴は,周期的に停滞する,高塩分ラグーン環境を示唆しています.
- アセンブラージは,ラヴス・クリーク・メンバのより多様なアセンブラージと著しく異なる.
結論:
- 制限された環境からのプロテロゾイク微生物群は,盆地分析と局所的な相関を情報にすることができます.
- 進化論とバイオストラティグラフィックの研究は,より制限が少ない古代の環境を優先すべきである.
- この発見は,環境ストレスが生命の初期形態に及ぼす影響を強調しています.
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