Passive margin

Map showing the distribution of Earth's passive margins (yellow swaths).

A passive margin is the transition between oceanic and continental lithosphere which is not an active plate margin.

It is constructed 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.

单词	Passive margin
释义	Passive margin 英语百科 Passive margin A passive margin is the transition between oceanic and continental lithosphere which is not an active plate margin. It is constructed 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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