A Geoscience Digital Image Library

TitleLassen Peak, California, from the northwest
DescriptionLassen Peak is a stratovolcano with a summit lava dome. It is in California, at the southern end of the Cascade Range, in Lassen Volcanic National Park. Major explosive eruptions occurred, beginning in May, 1914, and contining through 1917. Minor activity lasted until 1921. Lassen’s major eruptions were violent and were accompanied by pyroclastic flows and mudflows. All of Lassen’s rocks are andesite and dacite. Lava flows are found in some places, but most of Lassen’s deposits were airfall or mudflows. They range from fine ash beds to coarse and jumbled agglomerates. Besides Lassen, Mt. St. Helens is the only other Cascade volcano to erupt in the 20th century.
Geologic provinceCascade Mountains
LocationUSA ▹ California. Lassen Volcanic National Park.
PhotographerDexter Perkins. 2001-04-04.
Key wordsLassen, stratovolcano, California, dacite, andesite
Tech details473 KB. Vista. Canon Eos Rebel, 55mm lens, Fuji Sensia 100.
GeoDIL number286