The Twin Buttes are a group of volcanic cinder cones located in the Cascade Mountain Range of Shasta County, California. Geography The Twin Buttes lie north of Lassen Peak. Geology The Twin Buttes are a group of cinder cone volcanoes. Located in an area identified as a hotbed of Quaternary volcanic activity, the volcanoes likely formed between 15,000 and 10,000 years ago. The North and South Twin Buttes erupted blocky, partially unvegetated lava flows that moved north toward the southeastern base of Burney Mountain. See also List of volcanoes in the United States References Volcanoes of California Cascade Volcanoes Subduction volcanoes Cinder cones of the United States Cascade Range Volcanoes of Shasta County, California Pleistocene volcanoes