Did you know that the oldest rock in the world is estimated to be 3.8 billion years old? Rocks, though they may not seem like much, are actually very useful. Geology, the study of rocks and rock formation, is important because it provides us clues to the Earth’s past, and helps us understand our world better. However, rocks not only offer us the opportunity for insight and clues regarding the earth’s past, but they are also quite beautiful. Rocks are in fact connected to some of the world’s oldest art forms. For example, petroglyphs, or engravings or carvings in stone,…