Sedimentary rock is a type of rock formed from the accumulation and compression of mineral and organic particles over time. These particles can include fragments of other rocks, minerals, and even fossils. Sedimentary rocks often form in layers, which can be seen in cliffs and canyons, and they typically develop in environments like rivers, lakes, and oceans. Common examples of sedimentary rock include sandstone, limestone, and shale. These rocks are important for understanding Earth's history, as they often contain fossils and provide clues about past environments. Additionally, sedimentary rocks are significant resources for natural resources like coal, oil, and natural gas.