Mount Shasta
What remains of the oldest of Mount Shasta's four cones is exposed at Sargents Ridge on the south side of the mountain. Lavas from the Sargents Ridge vent cover the Everitt Hill shield at Mount Shasta's southern foot. The last lavas to erupt from the vent were hornblende-pyroxene andesites with a hornblende dacite dome at its summit. Glacial erosion has since modified its shape.
Details
- Age
- About 593,000 years
- Topo
- USGS Mount Shasta
- Type
- Stratovolcano
- Range
- Cascade Range
- Listing
- {{unbulleted list
- Embedded
- {{designation list | embed = yes
- Location
- Shasta–Trinity National Forest, California, U.S.
- Map Size
- 220
- Elevation
- 14,179 ft
- Formed By
- Subduction zone volcanism
- Isolation
- 335 mi
- Prominence
- 9,772 ft
- Elevation M
- 4321.8
- Parent Peak
- North Palisade
- Designation1
- NNL
- First Ascent
- 1854 by E. D. Pearce and party
- Volcanic Arc
- Cascade Volcanic Arc
- Easiest Route
- Avalanche Gulch ("John Muir") route: talus/snow climb
- Last Eruption
- 1250
- Label Position
- left
- Elevation System
- NAVD88
- Designation1 Date
- 1976