Tectonics
Links
This Dynamic Earth
http://pubs.usgs.gov/publications/text/dynamic.html
View of the planet Earth from the USGS.
WebDoGS Plate Tectonics Reconstruction
http://www.uky.edu/ArtsSciences/Geology/webdogs/plates/reconstructions.html
A collection of web goodies on plate tectonics reconstructions; links, research, animations, movies, and software.
When the Earth Moves: Seafloor Spreading and Plate Tectonics
http://www.beyonddiscovery.org/content/view.article.asp?a=229
Describes how investigators pursuing basic questions in ocean and terrestrial science gradually arrived at an understanding of how the planet's crust works.