formations

In geology, formations are large, distinct layers of rock that have a recognizable appearance and composition, formed over long periods. Think of them as chapters in Earth's history, each telling a story about the environment and conditions when they formed. They are used by geologists to identify and organize sections of the Earth's crust, helping to understand how the landscape has changed over time. Formations are mapped out on the Earth's surface and can include various types of rocks, such as sandstone, limestone, or shale, often stacking on top of or alongside one another in a specific sequence.