Did you know that every rock you pick up has changed many times throughout it's history? It's true - rocks change. Geologists like to describe the changes via a rock cycle. They also classify rocks into one of three types: igneous, sedimentary and metamorphic. Each of these types can become the other, depending on the process used to break the rock down and reform it. In this weekly I simply wanted to describe the three
Music
"Algo Rhythm Natural" by Podington Bear (Google Play • AmazonMP3 • iTunes)
Source: YouTube
