Landforms and Physiography - Aleutian Arc (Scheland, 2015)
Item
-
Title
-
Landforms and Physiography - Aleutian Arc (Scheland, 2015)
-
Description
-
The staple volcanic landform at convergent margins is the composite or stratovolcano. Before these breach the surface they start as seamounts below sea level. As the arc matures the seamounts grow into volcanic islands as the result of continual melt generation from the dehydration of the subducting slab. This process is explained in the magma generation section of this exhibit.
As the volcanic islands grow they may merge with neighboring ones to form larger land masses. Examples of well developed island arcs where this has occurred include Japan and New Zealand. The Aleutian Arc is moderately mature in the sense that is already has many stratovolcanoes that have formed islands and merged with others, but also has seamounts that are still below sea level towards the eastern portion of the fulll extent (Fig. 2).
An example of a stratovolcano along the Aleutian Arc that is active at the moment is Mt. Cleveland.
-
Subject
-
Landforms that occur at the Aleutian Arc convergent margin as the result of volcanism
-
Creator
-
Cullen Scheland
