The Columbia River defines the Pacific Northwest, from gigantic floods to thousands of shipwrecks, to the bucolic lake in the Canadian Rockies where the journey of the river begins. On the new Mossback Northwest special, we're revisiting last season's four-episode arc exploring the history and geology of the mighty Columbia River - putting a whole new perspective on "Roll On, Columbia." Mossback's Northwest: The Mighty Columbia River premieres Wednesday, April 2 at 7 PM and on the Cascade PBS ap

There’s a basic rule in geology: Sedimentary rock layers build up horizontally. So how did the slabs of Big Four Mountain in Western Washington end up with nearly vertical layers, tilted 82 degrees away from their original positions? Watch more episodes of Nick on the Rocks on the Cascade PBS app. https://bityl.co/NGcy | Cascade PBS

Coming soon: new Nick on the Rocks! From Leavenworth to Mount Rainier, Teanaway to Quadra Island, geologist Nick Zentner, senior geology lecturer at Central Washington University, takes us on another adventure across Washington to explore the fascinating history buried deep within the bedrock of the Evergreen State. Don't miss new episodes starting Thursday, December 11 on the Cascade PBS app! https://bit.ly/4lQvDch | Cascade PBS