Composite volcanoes are composite in three ways. They are composites of multiple eruptions. The eruptions that build up a composite volcano may be separated by hundreds of thousands of years. They are also composites of multiple materials. The eruptions that form these volcanoes lay down alternating layers of lava, ash and cinders. Thirdly, while this type of volcano might have only one vent, it also might be a composite of several vents.

 http://www.ehow.com/info_8520190_composite-volcano-kids.html

Composite Volcano

Mount Rainier, in Washington state, is a composite volcano