Rock formations are natural structures made up of one or more types of rocks. They can vary in size, shape, and color, and are often formed through geological processes such as erosion, sedimentation, and volcanic activity. Common types of rock formations include mountains, cliffs, and caves, each showcasing unique characteristics. These formations can provide valuable information about the Earth's history and the environment. For example, the layers of sediment in a sedimentary rock formation can reveal past climates and ecosystems. Additionally, rock formations often serve as habitats for various plants and animals, contributing to biodiversity.