The Cascade Mountains have been volcanically active for 46 million years - but the volcanoes we know, like Mounts Adams and Rainier, are very young. So where are the older volcanoes? Well, their bones are scattered throughout the low country of the Cascades, if you know where to look. Let's explore with Nick Zentner. | Cascade PBS

2.9K reactions · 189 shares | The Chumstick Basin, a major Eocene-era feature in the Cascade Mountain Range, is a fossilized sandbox, as Nick Zentner puts it. Let's wrap up our exploration of this unique area around Leavenworth! | Cascade PBS | Facebook