| 21. | North of this was the Columbia Embayment, where the continental margin was east of the surrounding areas.
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| 22. | The passive continental margin became active when the Farallon Plate started to dive below the North American Plate.
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| 23. | At times some of the metamorphosed downgoing slab may be thrust up or obducted onto the continental margin.
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| 24. | The Stephen Formation formed at a low-latitude miogeoclinic continental margin, at the western limit of a continental craton.
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| 25. | Due to its increased density, it flows down the Antarctic continental margin and continues north along the bottom.
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| 26. | Until recently, technological limitations had prevented extensive and detailed mapping of the U . S . continental margin,
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| 27. | Unlike most subduction zones worldwide, there is no deep oceanic trench present along the continental margin in Cascadia.
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| 28. | In plate tectonic terms, the Atlantic Plain is known as a classic example of a passive continental margin.
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| 29. | Another major point of discussion regards the presence of erosional deep canyons along the continental margins of the Basins.
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| 30. | As plants took hold on the continental margins, oxygen levels increased and carbon dioxide dropped, although much less dramatically.
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