Sam+&+Trevor

  Oceanic- Oceanic convergent boundaries are plate margins where one plate is overriding the other into the mantle beneath it. These boundaries form trenches and volcanic islands in the arc system. The plate that is being overridden goes down into the mantle and becomes magma. This raises the crust and creates volcanic islands. Trenches form where the one of the plates is subtucted or goes under the other. 
 * __ Oceanic-Oceanic Convergent __**

Some examples of this type of boundary is the Marianas Trench which is paralleling the Mariana Islands (these islands are located near Japan and the Philippines. A second example is the Aleutian Islands which is the string of islands off of Alaska. Another example of this boundary is the Java Trench which is located along southern Indonesia. This trench extends over 2,000 miles.

This type of boundary creates volcanoes and volcanic mountains. Along each of the examples listed above volcanoes are located along the whole trench. Earthquakes have been reported near each of the example trenches. The Aleutian Islands has many recent earthquakes.

1. Where is a trench located on a oceanic-oceanic boundary? 2. What is it called when a plate dives under another? 3. Where is the Marianas Trench located? 4. What forms from oceanic-oceanic boundaries?

Citations (APA)  Glasscoe, Maggi (1998/9/8). scign.jpl.nasa.gov. Retrieved February 27, 2009, from http://scign.jpl.nasa.gov/learn/plate4.htm  Watson, J. (1999/5/5). pubs.usgs.gov. Retrieved February 27, 2009, from http://pubs.usgs.gov/gip/dynamic/understanding.html  N/a, (2007/3/16). www.britannica.com. Retrieved February 27, 2009, from http://www.britannica.com/EBchecked/topic/301733/Java-Trench # 