Shingly is a type of rock formation that is made up of small, flat pieces of sedimentary rock. It is often found along coastlines and is composed of quartz and feldspar. Pebbly is another type of rock formation that is made up of small, rounded stones. Pebbly is usually found in riverbeds and is composed of quartz, feldspar, and other minerals. Both Shingly and Pebbly are sedimentary rocks, meaning they were formed by the deposition of material from water or wind.