Lassen volcanic
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Lassen Volcanic. Slab window. Slab windows. Lassen Volcanic. Slab Window. Dacite dome. Lassen Peak. Chaos Crags. Former location of Mt. Tehama. Brokeoff Mountain (Mt. Tehama remnant). More remnants of Mt. Tehama. Mount Dillar. Pilot Pinnacle. History.

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Lassen Volcanic

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Lassen volcanic

Lassen Volcanic


Lassen volcanic

Slab window


Lassen volcanic

Slab windows


Lassen volcanic

Lassen Volcanic

Slab Window


Lassen volcanic

Dacite dome


Lassen volcanic

Lassen Peak

Chaos Crags


Lassen volcanic

Former location of Mt. Tehama


Lassen volcanic

Brokeoff Mountain (Mt. Tehama remnant)


Lassen volcanic

More remnants of Mt. Tehama

Mount Dillar

Pilot Pinnacle


Lassen volcanic

History

  • Mt Tehama composite volcano built 600,000 to 400,000 years ago

  • Mt Tehama collapse(?) and erosion

  • Domes, glaciers and more domes

  • Most recent activity 1914-1921


Lassen volcanic

PROJECTED HEIGHT OF MT TEHAMA

MOUNT LASSEN

BROKEOFF MOUNTAIN


Lassen volcanic

History

  • Mt Tehama composite volcano built 600,000 to 400,000 years ago

  • Mt Tehama collapse(?) and erosion

  • Domes, glaciers and more domes

  • Most recent activity 1914-1917


Lassen volcanic

The great dacite dome of Lassen Peak

25,000 - 31,000 years old


Lassen volcanic

Talus


Lassen volcanic

Lake Helen: Filled crater, caldera or cirque?


Lassen volcanic

Lake Helen fills a cirque


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Tarn


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Crescent Crater


Lassen volcanic

Lassen Peak

Chaos Crags


Lassen volcanic

Lassen Peak

Chaos Crags


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