![]() The archipelago extends for 160 miles (257 km) between San Miguel Island in the north and San Clemente Island in the south. The four northern Islands used to be a single landmass known as Santa Rosae. ![]() ![]() The islands are divided into two groups the northern Channel Islands and the southern Channel Islands. The eight islands are split among the jurisdictions of three California counties: Santa Barbara County (four), Ventura County (two), and Los Angeles County (two). The islands harbor 150 unique species of plants. The Channel Islands and the surrounding waters house a diverse ecosystem with many endemic species and subspecies. military uses some of the islands as training grounds, weapons test sites, and as a strategic defensive location. The Chumash and Tongva Native Americans who lived later on the islands may be the descendants of the original inhabitants, but they were then displaced by Spaniards who used the islands for fishing and agriculture. The Nature Conservancy was instrumental in establishing the Channel Islands National Marine Sanctuary. Five of the islands are within the Channel Islands National Park, and the waters surrounding these islands make up Channel Islands National Marine Sanctuary. The four Northern Channel Islands are part of the Transverse Ranges geologic province, and the four Southern Channel Islands are part of the Peninsular Ranges province. ![]() The Channel Islands ( Spanish: islas del Canal, Archipiélago del Norte) are an eight-island archipelago located within the Southern California Bight in the Pacific Ocean, off the coast of California. Beach of Santa Cruz Island Beach at San Miguel ![]()
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