Sedimentary rocks are formed through the accumulation and compaction of mineral and organic particles over time. These rocks often develop in layers, which can provide valuable information about the Earth's history and past environments. Common examples include sandstone, limestone, and shale. The formation process of sedimentary rocks typically involves weathering, erosion, and deposition. They can be found in various settings, such as riverbeds, lakes, and oceans. Understanding sedimentary rocks is crucial for fields like paleontology and oil exploration, as they often contain fossils and natural resources.