テキサス州中部のシルリアン:この地域の初めての記録

V E Barnes, A J Boucot, P E Cloud

Science (New York, N.Y.)

|November 25, 1966

まとめ

ニューシルリアン・スターク石灰岩の露出がテキサス州中部のリラノ高原で発見された. これらのこれまで記録されていなかった地質学的な構造は,エレンブルガー群の崩壊構造の中で発見されています.

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:

シルルア紀の岩層はテキサス州中部では稀である.
Llano upliftは,地域層図を理解するための重要な地質学的な地域です.

研究の目的:

テキサス州中部で,これまでに記録されていないシルウリアン時代の浮き彫りの発見を記録するために.
新たに特定されたStarcke石灰岩の形成を特徴づけるために.

主な方法:

地質学的なフィールドマッピングと岩石の露出物の識別.
岩層構造のストラティグラフィック分析.
化石の収集と年代測定.

主要な成果:

シルリアン期の露出は,Llanoの上昇で崩壊した構造物の中で特定されました.
スターケ・クライストーン (Starcke Limestone) と名付けられたこの新しい形成は,ピンク色の灰色の粒状の石灰岩です.
化石は,スターク石灰岩のウェンロック時代の可能性を示しています.

結論:

スターク石灰岩の発見は,テキサスのこの地域におけるシルウリア時代の露出物の最初の記録を表しています.
スターケ石灰岩は,シルル紀期におけるラノ高原の地質史と堆積環境に関する新しい洞察を提供している.

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