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Tue 20 Mar, 2012 04:36 pm
what process within earth's asthenosphere is responsible for plate motions?
@erikabxoxo,
These articles on the USGS website will help you with your homework:
http://www.nature.nps.gov/GEOLOGY/usgsnps/pltec/pltec1.html
Here's the online version of the award winning article called "The Dynamic Earth - the story of plate tectonics."
http://pubs.usgs.gov/gip/dynamic/dynamic.html