Did you know that downtown Oakland is built on ancient sand dunes? Or that the East Bay hills used to be honeycombed with quarries and mines? Or why Fruitvale was such a great place to plant orchards in the 1800s? These are just a few of the stories Andrew Alden explores in his new book “Deep Oakland: How Geology Shaped a City.” (Heyday) According to Alden, Oakland has the most rock diversity of any U.S. city, and in today’s episode we discuss stories below the soil. The conversation covers everything from earthquakes and volcanoes to landslides and potholes. Check out photos related to this episode at: https://eastbayyesterday.com/episodes/from-volcanoes-to-potholes/ East Bay Yesterday can’t survive without your donations. Please make a pledge to keep this show alive: www.patreon.com/eastbayyesterday This episode is supported by UCSF Benioff Children’s Hospitals. I highly recommend checking out their new podcast, “Revolutionary Care: An Oakland Story,” a series about the history of treating sickle cell anemia: www.ucsfbenioffchildrens.org/sickle-cell