Sedimentary rocks are made up of pieces of older rocks (igneous, metamorphic, and sedimentary) and organic remains (shells, bone, etc.). When rocks break apart from erosion they are transported by ...

This image is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. When we look at a rock, we often just focus on its size and appearance. Is it light or heavy? Dark or ...

Rolling dice is an excellent way to emphasize that the rock cycle is deceptively named. Equally importantly, what felt like a failed lesson in volcanoes to me was not noticably catastrophic for my ...