The Northern Channel Islands: A Sanctuary in Nature Amid the Southern California Megalopolis

[...]the bedrock of the Channel Islands consists largely of volcanic rock, and visitors to the islands will often see areas where this rock is exposed at the surface.\n A visit to the islands does, however, require some planning because of unique challenges, not the least of which is that a short ocean passage or flight in a light aircraft is required to reach the islands. [...]the 1980/1985 General Management Plan for the Park emphasized the study, inventory, and monitoring of natural and cultural resources along with preserving such resources and reducing the presence of threatening exotic species through removal and trial-eradication methods (National Park Service 1980, 1985).