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Bay Nature magazineApril-June 2005

Latest from volcano

Voice of the Volcano

April 01, 2005 by Gordy Slack

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 Oakland where an ancient volcano has laid bare a tale of fiery eruptions, long-extinct ecosystems, and the massive movements of tectonic plates. Many people go to Sibley Regional Preserve for the views of Mount Diablo or the quirky labyrinths at the bottoms of old quarry pits. But look closely at the trailside rocks, and you’ll see lava flows and a volcano turned on its side!

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