Subduction

 Plate Tectonics-   Subduction BY: Michael, Kevin, Allison, Michaela, and Dominique

 What is Subduction? Subduction is when an old plate and a young plate hit each other in the ocean, the younger one goes over the older one because the older one is thicker. The model shows the oceanic crust and the ocean and a trench. What it doesn't show is the continental plate, which is like the older plate, and the oceanic plate is like the younger plate. So, the oceanic plate runs into the continental plate, and goes over it.

The subducted plate partially dissolves as it goes farther into the ground, and less dense parts try to rise to the top.

The result is volcanoes, as shown above.

Subduction zone
The subduction zone is the place where two lithospheric plates come together, one riding over the other. Most volcanoes on land occur next to and inland from the boundary between the two plates. This subduction zone is off the coast of Washington and Oregon, near the Juan de Fuca Plate.



This video shows the dimensions of a subduction zone: http://oceanexplorer.noaa.gov/explorations/03fire/logs/subduction.html

Weird Simile to describe Subducition: -Subduction is like playing leapfrog with a young and an old person, the young one (plate) goes over the old one (plate).

www.platetectonics.com www.answers.com [|www.zebu.uoregon.edu]
 * __ SOURCES: __**

URL: http://earthquake.usgs.gov/learning/glossary.php?term=subduction%20zone Page Contact Information: [|EHP Web Team] Page Last Modified: July 16, 2008 20:11:15 UTC  __** QUESTIONS: **__
 * 1) According to answers.com, a subduction zone is a zone where rocks of an oceanic plate are forced to plunge below much thicker _ ___ crust.
 * 2) How does subduction occur?
 * 3) True or False: Suduction is the process in which one plate is pushed downward beneath another plate into the underlying mantle when plates move toward each other.
 * 4) According to the picture above, which two lithospheric plates come together?
 * 5)     What happens to the plate that goes into the mantle?