Wait. There's A Volcano in the East Bay Hills?

<p>If you head to Sibley Volcanic Regional Preserve above Oakland, you might wonder the same thing as Bay Curious listener Bourke MacDonald: How did a volcano form here and why did it go extinct?Today on the show, we’re going hiking to learn more about this Bay Area geological wonder.</p><p>Additional Reading:</p>  What! There Was A Volcano in the East Bay Hills? Video: Geology Tour with Steve Edwards at Sibley <p><br></p><p>Reported by Katrina Schwartz. Bay Curious is made by Katrina Schwartz, Suzie Racho and Brendan Willard. Additional support from Erika Aguilar, Jes...