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from Discover with Dr. Cool

Did you know that Geodes were formed by Ancient Volcanoes?

Allison Coward -- most geodes that we find today are from old volcanic eruptions. As lava cooled air bubbles were trapped inside cresting empty pockets. over millions of years minerals filled those pockets created the beautiful crystal treasure that we find today.


Here's a photo from Kanaga Volcano, one of the most southerly members of the Aleutian Islands chain. In the foreground is a stunning view of a lava flow from a 1906 event. According to records, a trapper living on the island in 1906 experienced several earthquakes and witnessed lava pouring down both east and west sides of the cone. You can learn more about Kanaga Volcano, see images, and read about current past activity at Photo credit: Michelle Combs, USGS. You can…