which california mountain was made by volcanic eruptions
Lassen Peak Lassen Peak,[3] commonly referred to as Mount Lassen, is the southernmost active volcano in the Cascade Range of the Western United States. Located in the Shasta Cascade region of Northern California, Lassen stands 3,500 ft (1,100 m) above the surrounding terrain and has a volume of 0.5 cu mi (2 km3), making it one of the largest lava domes on Earth.[4] It arose on the destroyed northeastern flank of now-gone Mount Tehama, a stratovolcano at least 1,000 ft (300 m) higher than Lassen Peak. It is part of the Cascade Volcanic Arc, which stretches from southwestern British Columbia to northern California.