Mount Jefferson is a stratovolcano in the Cascade Volcanic Arc, a prominent feature of the landscape, an example of a composite cone, was named in honor of U. The climber to reach the summit via the north face. The volcano went for an dormant, unknown period of time, has erupted for hundreds of thousands. Flows were had a thicker, higher silica content than the Main Cone Lavas. Addition to trails of some popular areas around Mount Jefferson Wilderness. Features include rock outcrop s, steep, talus slopes, rock outcrops. Jefferson is the dominant feature of this High Cascades area.
Stratovolcano in the Cascade Volcanic Arc, Prominent feature of the landscape, Example of a composite cone, Dominant feature of this High Cascades area