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Channel Islands National Park is a national park of the United States, ... Santa Barbara Island consists of basalt-basaltic andesite and andesite volcanic flows ...
The Channel Islands consist mainly of sedimentary rock, which lies on a deep platform of volcanic rock. This, in turn, lies atop the eastern margin of the Pacific plate , a large tectonic plate which mostly consists of the oceanic crust underlying the Pacific Ocean but also incorporates the continental crust of California west of the San ...
Along with Santa Barbara Island, Anacapa was formed by volcanic eruptions between 19 and 15 million years ago. [8] [1] These eruptions are believed to have been caused by thinning of ocean crust as the block containing the northern Channel Islands and Santa Monica Mountains was rotated clockwise by the transverse motion of the Pacific and North American plates. [8]
Entry is free to Channel Islands National Park, but visitors without boats will need to pay for the third-party ferry. One-way fares between the mainland and islands starts at $31.50 for ...
While the island is not a volcano, it is composed primarily of Miocene volcanic rocks interbedded with marine sediments. [4] 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).
These islands are often referred to as the Channel Islands archipelago. They are not part of the mainland but are remnants of an ancient mountain range. Catalina is primarily composed of two distinct rock units: Catalina Schist from the Early Cretaceous (95 to 109 million years ago), and Miocene volcanic and intrusive igneous rocks. The ...
Map of Channel Islands. San Clemente Island (Tongva: Kinkipar; Spanish: Isla de San Clemente) [1] is the southernmost of the Channel Islands of California. It is owned and operated by the United States Navy, [2] and is a part of Los Angeles County. It is administered by Naval Base Coronado.
Great Britain: Channel Islands in Encyclopedia of European and Asian Regional Geology by Eldridge M. Moores, Rhodes Whitmore Fairbridge, Published 1997 by Springer pp 276–277. John Renouf: Geological excursion guide 1: Jersey and Guernsey, Channel Islands in Geology Today volume 1 number 3 1985; Dr Ralph Nichols: Jersey Geology Trail