Small hills NNW of Mt. Shasta are hummocks created during a massive...
Detailed Description
This view is from the top of Gregory Mountain, located about 40 km from the summit of the volcano. The prominent cone on the right skyline is Black Butte, a collection of four overlapping lava domes that were erupted about 9,500 years ago.
Sources/Usage
Public Domain.
Related
Debris Avalanches Occur at Many Cascade Volcanoes
Massive slope collapse is natural part of the life cycle of Cascade volcanoes.
Hummocks Indicate Large Eruption from Shasta
Hundreds of small hills, called hummocks, extend from the base of Mount Shasta at least 45 km (27 mi) NNW across the floor of Shasta Valley. The hummocky landslide deposit was emplaced between 380,000 and 300,000 years ago during a massive debris avalanche that is not believed to be associated with volcanic activity.
Related
Debris Avalanches Occur at Many Cascade Volcanoes
Massive slope collapse is natural part of the life cycle of Cascade volcanoes.
Hummocks Indicate Large Eruption from Shasta
Hundreds of small hills, called hummocks, extend from the base of Mount Shasta at least 45 km (27 mi) NNW across the floor of Shasta Valley. The hummocky landslide deposit was emplaced between 380,000 and 300,000 years ago during a massive debris avalanche that is not believed to be associated with volcanic activity.