The three types of rock October 21st, 2011 • Filed under: geology | humor Hah. My sister sent this to me. Related Posts Geology sighting! August 7, 2023 volcanoes Some things are better left unsaid April 26, 2011 NASATweetup Have there really been more earthquakes than average? March 1, 2010 ← Previous Post Extrapolating the screen size of Android mobile phones over time. Next Post → Stop SOPA
