Geology and History
Geology and History
Geology and history of Mount Bachelor.
Geology and History Summary
Geology and History Summary
Mount Bachelor is a basalt to basaltic andesite summit cone that sits atop a shield volcano 15 km southeast of South Sister.
Mount Bachelor's Summit
Mount Bachelor's Summit
The summit of Mount Bachelor is composed of numerous vents that erupted short, blocky basaltic-andesite lava flows.
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Geology and History Summary for Mount Bachelor
Mount Bachelor is a basalt to basaltic andesite summit cone that sits atop a shield volcano 15 km southeast of South Sister.
Eruption History of Mount Bachelor Volcanic Chain
Four discrete eruptive episodes are recognized.
Mount Bachelor's Summit
The summit of Mount Bachelor is composed of numerous vents that erupted short, blocky basaltic-andesite lava flows.
Mount Bachelor Ski and Recreation Area
The likelihood of a volcanic eruption from Mount Bachelor affecting the ski area is relatively low, as the type of eruption that formed the mountain is typically a single-duration eruptive event.