Water Canyon Campgroun

Santa Rosa Island is mainly composed of sedimentary rocks overlain by Pleistocene marine terrace deposits, which largely cover the island except where they have been eroded. A major fault, the Santa Rosa fault, trends eastward across the island, producing distinct difference in topography between the northern and southern parts of the island. The northern half of the island has broad, flat terraces into which streams have cut deep canyons. South of the Santa Rosa fault, the land is higher and more rugged. The highest point, Soledad Peak, at 1574 ft (508 m), lies on the ridge that follows the trend of the fault. For additional information regarding the geology of the California Channel Islands please visit the Channel Islands National Park website and for maps please visit the Geologic Maps Foundation who have generously donated maps to the SRIRS.