Welcome to the Guild! If you get a chance, I started a thread quite some time ago about plate tectonics and was trying to use them for my own campaign world as justification for some of the landforms and what not. If you get a chance, I would love some critiques on what is there and feel free to add additional information. We are an incredibly friendly community and have no problems with receiving constructive criticism and comments so don't feel that you have to apologize all the time. We are here to learn and if the comments mean bettering our skills than they are worth it.

You can find the thread here: http://www.cartographersguild.com/showthread.php?t=1322