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Mount Sylvania volcano

View on map:45.438167°N 122.721639°W

Description


Mount Sylvania

Mount Sylvania is an extinct volcano, part of the Boring Lava Field, on the outskirts of Portland, Oregon. The parts of the mountain are within the cities of Portland, Lake Oswego, and Tigard. Mountain Park, a Lake Oswego suburban development, was built on the mountain in the 1970s.

References

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