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Geology of Lassen Volcanic National Park
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Lassen Volcanic National Park is the home of four types of volcanics, all of which have been active in recent geologic history. For more information on Lassen's volcanic past and present click on the links below.

"Hot Water" in Lassen Volcanic National Park

How old is "Cinder Cone"? - Solving a Mystery in Lassen Volcanic National Park

Volcano Hazards of Lassen Volcanic National Park

Eruptions of Lassen Peak, California, 1914 to 1917

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