Teaching Moments - Columbus Rocks

[postlink] http://teachingmomentscscc.blogspot.com/2010/11/teaching-moments-columbus-rocks.html[/postlink] http://www.youtube.com/watch?v=zCMxUbbH-skendofvid
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Columbus State Community College Geology Professor Jeff Richardson gives us a quick lesson on the different kinds of rocks in and around Columbus.
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