海底峡谷の浸食:海洋岩石掘削者による貢献

J E Warme, T B Scanland, N F Marshall

Science (New York, N.Y.)

|September 17, 1971

まとめ

バイバル類やポリケータ類のような海洋無脊椎動物は,スクリップス海底峡谷の岩石を大幅に侵食しています. 彼らの掘削活動は通路を作り,多くの地域で岩の崩壊と物理的な侵食を上回る岩石の崩壊につながります.

科学分野:

マリン・バイオロジーの海洋生物学
地質学地質学地質学
無脊椎動物の古生物学について

背景:

スクリップス・サブマリン・キャニオン (Scripps Submarine Canyon) の岩石環境は,様々な侵食力にさらされています.
海の無脊椎動物は,峡谷の地質構造に居住し,相互作用しています.

研究の目的:

スクリップス・サブマリン・キャニオン内の岩石浸食における海洋無脊椎動物の掘削の役割を調査する.
生物学的侵食と物理的,化学的侵食の重要性を比較する.

主な方法:

峡谷内の岩層のフィールド観測.
主要な無脊椎の穴を掘る生物 (双弁類,ポリヘト類,シプンキュロイド類) の特定.
掘削の強度と,その結果生じる岩の変化の評価.

主要な成果:

峡谷の縁や上壁の岩は,海洋無脊椎動物による激しい掘削を示しています.
掘削活動により,広範囲にわたる通路のネットワークが形成され,岩石の崩壊に寄与する.
脊椎動物による侵食は支配的なプロセスであり,しばしば物理的および化学的侵食を上回ります.

結論:

海洋無脊椎動物は,スクリップス海底峡谷における重要な地形物質である.
生物的侵食は,峡谷の岩石基板の形成に重要な役割を果たしています.
これらのプロセスを理解することは,海洋地質学の研究において極めて重要です.

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