Retrieving "Continental Margin" from the archives

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1. Continental Collision

   Linked via "continental margin"

   Mechanisms of Crustal Stacking
   When a passive continental margin encounters an active subduction zone, the oceanic lithosphere previously separating the continents is entirely consumed. As the two continental bodies meet, convergence does not cease but is accommodated through complex mechanical responses. The primary mechanism is crustal stacking, where slices of crust are thrust over one another along numerous low-angle faults, known as decollements or [thrust faults]…

2. Island Arc

   Linked via "continental margin"

   Paleogeographic Significance
   Island arcs are ephemeral features on geological timescales, constantly evolving through accretion. When an island arc collides with a continent, the subduction zone effectively shuts down or shifts, leading to the amalgamation of the arc crust onto the continental margin. Such an event is re…

3. Oceanic Crust

   Linked via "continental margins"

   Oceanic Crust vs. Andesitic Rocks
   While oceanic crust is predominantly mafic, the igneous rocks found in island arcs and continental margins, such as andesitic rocks, represent a crucial intermediate composition [1]. Andesite, which has a silica content between basalt and rhyolite, forms predominantly in subduction zones where flu…