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Global Volcanism Program | Image GVP-03195

These hills below the north flank of Mount Shasta are part of the massive Shasta Valley debris-avalanche deposit, formed during the Pleistocene by a major volcanic landslide from Mount Shasta.  Individual hills, composed of remnants of an ancestral Shasta volcano, are up to 200 m high and range to more than 1 km in length. Photo by Lee Siebert, 1981 (Smithsonian Institution).

These hills below the north flank of Mount Shasta are part of the massive Shasta Valley debris-avalanche deposit, formed during the Pleistocene by a major volcanic landslide from Mount Shasta. Individual hills, composed of remnants of an ancestral Shasta volcano, are up to 200 m high and range to more than 1 km in length.

Photo by Lee Siebert, 1981 (Smithsonian Institution).


Shasta