Welcome to Wikipedia. Everyone is welcome to make helpful changes to Wikipedia. However, some of your changes, like those to "Metamorphic rock", did not seem to be helpful and have been reverted or removed. If you want to try out changing Wikipedia to learn more about how it works, please use the sandbox. Thank you. Ignacio 
(talk) 16:45, 16 May 2012 (UTC)
May 2012 change
Your recent changes are vandalism and are not acceptable on Wikipedia. Please stop. If you continue vandalizing, you will be blocked from changing pages on Wikipedia. Ignacio (talk) 16:59, 16 May 2012 (UTC)
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