The three types of rock October 21, 2011 Posted in: geology humor Hah. My sister sent this to me. Related Posts Volcano sighting! July 27, 2024 seattle volcanoes Exploring Mount St. Helens blast zone using Google Earth May 23, 2024 volcanoes Happy Museum Selfie Day January 17, 2024 ai-art dalle3 generative-art meetings work zoom ← Previous Post Extrapolating the screen size of Android mobile phones over time. Next Post → Stop SOPA