The USA geophysical map was created by Lyndsey McCollam (lizardpoint.com) and is a derivative work of
http://commons.wikimedia.org/wiki/File:Blank_US_Map.svg 
, which was created by
User:Theshibboleth 
.
This file is licensed under the
Creative Commons Attribution-Share Alike 3.0 Unported 
license.
To use this image, you must attribute it to the original creator, User:Theshibboleth, and to the derivative author, Lyndsey McCollam with a link back to lizardpoint.com, and include a copy of the Creative Commons Attribution-Share Alike 3.0 Unported license.

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