まとめ
ボストン盆地 ボストン盆地
科学分野:
- 地質学 地質学 地質学
- パレオントロジー・パレオントロジー
- ストラティグラフィー ストラティグラフィー
背景:
- ボストン盆地の地質年齢は研究の対象となっている.
- これまでの研究は,盆地の堆積岩の年齢を決定的に定めたことができなかった.
研究 の 目的:
- ボストン盆地のヴェンディアン (末期プロテロゾイクZ) 時代を決定する.
- 精密な地質年代測定のためのマイクロ化石分析を利用する.
主な方法:
- ケンブリッジ・アルギライトの微生物化石分析.
- 特定された微生物群を,既知のプレカンブリア期末期の集合体と比較した.
- ピライトで保存されたマイクロ化石のペトログラフィック分析.
主要な成果:
- ボストン盆地にはヴェンディアン (末期プロテロゾーイクZ) 時代が決定された.
- マイクロ化石,バヴリネラ (Bavlinella cf.) を含む. faveolata,が特定され,分析されました.
- 化石は,ピライトの石化物として保存されている状態で発見されました.
結論:
- ヴェンディアン時代は,ボストン盆地にとって新しい時間的枠組みを提供する.
- この年齢指定は,盆地の構造の再解釈を容易にする.
- ボストン盆地の地質の地域的相関は,今修正することができます.
さらに関連する動画
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