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Pacific Mountain System |
Lassen PeakLassen Volcanic National ParkPhoto by M. Moreno, USGS.
Mount Lassen is the southern most of the Cascades Volcanoes. It last erupted in 1914-17.
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Bumpass HellLassen Volcanic National ParkPhoto by M. Moreno, USGS.Escaping gasses, heated by hot volcanic rock beneath the surface, bubble out of Bumpass Hell's mudpots. |
Bumpass HellLassen Volcanic National ParkPhoto by M. Moreno, USGS.Escaping gasses bubble out of Bumpass Hell's mudpots. |
Bumpass HellLassen Volcanic National ParkPhoto by M. Moreno, USGS.Steam rises from fractures and sulfur-rich pools at Bumpass Hell. |
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