Santa Barbara Island
Santa Barbara Island
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Santa Barbara Island

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Santa Barbara Island

33°28′37.16″N 119°02′15.80″W / 33.4769889°N 119.0377222°W / 33.4769889; -119.0377222

Santa Barbara Island (Spanish: Isla de Santa Bárbara; Tongva: Tchunashngna) is a small island of the Channel Islands archipelago in Southern California. It is protected within Channel Islands National Park, and its marine ecosystem is part of the Channel Islands National Marine Sanctuary. Public passenger access to Santa Barbara Island is provided by the Island Packers ferry service.

The island is located about 38 miles (61 km) from the Palos Verdes Peninsula coast of Los Angeles County, Southern California, (near Ventura County and west of Greater Los Angeles).

With a total area of about 1 square mile (640 acres or 260 hectares), it is the smallest of the eight Channel Islands. It is the southernmost island in the Channel Islands National Park. The highest peak on the island is Signal Hill, at 634 ft (193 m).

Although closer to mainland Ventura County and Los Angeles County, the island is part of Santa Barbara County (United States Census Bureau Block 3012, Block Group 3, Census Tract 29.10). It is the only one of the four southern Channel Islands included in the Channel Islands National Park, which also encompasses all four northern islands. As of the 2000 census the island is uninhabited and has a total land area of 1.0136 sq mi (2.625 km2).[better source needed]

The island is so small that it cannot usually be seen from the mainland, except on clear days (usually in winter). At sunset the island is a backlit silhouette.

While the island is not a volcano, it is composed primarily of Miocene volcanic rocks (basalt) interbedded with marine sediments.

The steep wave-cut cliffs of its shoreline indicate that this is one of the younger Channel Islands. It exhibits at least six marine terraces; evidence of repeated tectonic uplift and subsidence (so called porpoising). Arch Point, on the north-east shore of the island is a 130 ft (40 m) arch caused by wave erosion of fault weakened rock.

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