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A passive margin is the transition between oceanic and continental lithosphere that is not an active plate margin. A passive margin forms by sedimentation above an ancient rift, now marked by transitional lithosphere. Continental rifting creates new ocean basins. Eventually the continental rift forms a mid-ocean ridge and the locus of extension moves away from the continent-ocean boundary. The transition between the continental and oceanic lithosphere that was originally created by rifting is known as a passive margin.

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  • Passive margin
  • Marge passive
  • Margine passivo
  • パッシブ・マージン
  • Passieve marge
  • Krawędź pasywna
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  • En géologie, une marge passive ou marge continentale passive correspond à la zone de transition entre la croûte continentale et la croûte océanique (plaine abyssale) quand il n'y a pas de subduction. La marge correspond alors à l'une des deux épaules du rift qui a initié l'ouverture océanique (l'autre épaule du rift se trouve de l'autre côté de l'océan).
  • A passive margin is the transition between oceanic and continental lithosphere that is not an active plate margin. A passive margin forms by sedimentation above an ancient rift, now marked by transitional lithosphere. Continental rifting creates new ocean basins. Eventually the continental rift forms a mid-ocean ridge and the locus of extension moves away from the continent-ocean boundary. The transition between the continental and oceanic lithosphere that was originally created by rifting is known as a passive margin.
  • パッシブ・マージン (Passive margin) は、大陸と海洋の境界を表す地質用語である。プレートテクトニクス用語である発散型境界や収束型境界とも異なる。 プレート同士が衝突する境界がアクティブと呼ばれるの対する言葉で、実際に大陸縁辺に海溝が発達する太平洋周縁には存在せず、大西洋とインド洋の周縁に見られる。プレート同士の境界ではなく、プレート内に分布するとも言える。唯一例外は紅海とアデン湾で、ここは現在活動するリフトのためプレート境界を形成する。また、大陸からの堆積物供給量が大きく、大陸棚や大陸斜面が発達するのが特徴的である。場所によっては火山活動もある。
  • Krawędź pasywna, krawędź typu atlantyckiego – granica pomiędzy litosferą kontynentalną a oceaniczną w obrębie jednej płyty tektonicznej.
  • Een passieve marge (Engels: passive margin) is in de tektoniek een overgang tussen de continentale lithosfeer onder een continent of een continentaal plat en oceanische lithosfeer onder een oceaan, waar geen plaatgrens ligt. De passieve marge komt ongeveer overeen met wat in de oceanografie de continentale helling en continentale verheffing worden genoemd. Soms wordt de passieve marge gemeten vanaf de kustlijn of de continentale helling, maar een tektonisch correctere manier is te meten vanaf de verst landinwaartse afschuiving. De buitengrens van de passieve marge is de plek waar de eerste oceanische korst ligt.
  • Questa distinzione riguarda il fatto se un confine crostale tra litosfera oceanica e continentale sia o no anche il confine tra due placche tettoniche. I margini attivi si trovano sul bordo di un continente dove avviene la subduzione. Essi sono spesso segnati da sollevamenti e da cinture montuose vulcaniche sulla placca continentale. Meno spesso vi è una faglia trascorrente, come quella che definisce la linea costiera meridionale dell'Africa occidentale. La maggior parte del margine dell'Oceano Indiano orientale e quasi tutto quello dell'Oceano Pacifico sono esempi di margini attivi. Sebbene una saldatura tra litosfera oceanica e continentale sia chiamata margine passivo, non si tratta di un margine inattivo. Subsidenza attiva, sedimentazione, fagliamento di crescita, formazione di fluidi
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