The 46-km-long Lane County coastal belt (Table 5) is divided into five DCS (Dominant Catenary Sequence) domains and three super domains: the Searose Beach-Cliff-Upland, Heceta Beach-Dune-Wetland, and Florence Barrier-Beach-Dune-Wetland. The Oregon dunes backing these littoral cells comprise one of the largest expanses of temperate coastal sand dunes in the world and are dominant features of the Heceta and Florence super domains.