The Salton Buttes are a group of volcanoes in Southern California, on the Salton Sea. They consist of a 7-kilometer -long row of five lava domes, named Mullet Island, North Red Hill, Obsidian Butte, Rock Hill and South Red Hill. They are closely associated with a fumarolic field and a geothermal field, and there is evidence of buried volcanoes undergro…The Salton Buttes are a group of volcanoes in Southern California, on the Salton Sea. They consist of a 7-kilometer -long row of five lava domes, named Mullet Island, North Red Hill, Obsidian Butte, Rock Hill and South Red Hill. They are closely associated with a fumarolic field and a geothermal field, and there is evidence of buried volcanoes underground. In pre-modern times Obsidian Butte was an important regional source of obsidian.
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