Cross-bedding is a geological feature found in sedimentary rocks, characterized by layers of sediment that are inclined at an angle to the main bedding plane. This occurs when sediment is deposited by wind or water, creating slanted layers as the material shifts and settles. These angled layers can provide important information about the environment in which the sediment was deposited, such as river channels or dune formations. By studying cross-bedding, geologists can interpret past geological processes and understand the history of the Earth's surface.