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Quarry aerial
Steve Edwards with geoogical map
Lava and red ash outcrop
Teen & Family Adventures - Sibley Volcanic Preserve: Connect with your teen on these fun, challenging outdoor experiences.
Sibley Panorama
Sibley Preserve Map
Proposed Development of Gateway Valley
KQED Quest Sibley Exploration: Audio slideshow and other materials about Sibley Regional Volcanic Preserve in Oakland.
Sibley Volcanic Regional Preserve: The geologic history of the east bay is easily seen in Round Top, one of the area's highest peaks, left over from a 10-million-year-old volcano.
When was the last volcanic eruption in the Bay Area? Where was it?
Voice of the Volcano: We all know that the East Bay hills are ripe for an earthquake, but volcanoes? Don't look for lava in the headlines anytime soon, but there is a place in ...

Bay Nature