Marine Provinces - MARS 1010 Objectives Questions Marine...

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MARS 1010 – Objectives Questions Marine Provinces Reading Assignment: Chapter 4 in Sverdrup and Armbrust 1. What are the key features distinguishing active and passive continental margins? Why do these two types of margins differ? The edges of landmasses are present below the ocean surface and the steep slopes that descend to the sea floor are know as the continental margin. Passive, or Atlantic margins- passive margins have little seismic or volcanic activity and involve a transition from continental crust to oceanic crust in the same lithospehric plate. They form after continents are fidgeted apart, creating a new ocean basin between them. They tend to be relatively wide. They also have thick sediments. Active, or Pacific margins- are tectonically active and associated with earthquakes and volcanism. Most are associated with plate convergence and subduction of oceanic lithosphere beneath a continent. Active margins are plate boundaries and are usually relatively narrow. The slopes are typically steeper than passive
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This homework help was uploaded on 04/13/2008 for the course MARS 1010L taught by Professor Jager during the Fall '07 term at University of Georgia Athens.

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Marine Provinces - MARS 1010 Objectives Questions Marine...

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