Henrys Fork Caldera: Yellowstone's Last Caldera Eruption Completely in Idaho

Join geology professor Shawn Willsey as he takes you on a tour of the Henrys Fork Caldera, a ~20-mile wide caldera that formed 1.3 million years ago during a huge violent eruption that ejected 280 cubic miles of ash. This eruption was the second most recent of the three big Yellowstone eruptions over the last two million years. Support geology education via: PayPal: https://www.paypal.com/donate/?hosted... or Buy Me: https://buymeacoffee.com/shawnwillsey or Venmo: @shawn-willsey or click on the "Thanks" button above or a good ol' fashioned check to: Shawn Willsey 148 Blue Lakes Blvd N #141 Twin Falls, ID 83301 Willsey website: https://www.willseygeology.com/ Willsey merch store: https://geologyexplained-shop.fourthw... 00:00 caldera locations 00:20 intro, within the caldera 01:55 map of Yellowstone's three recent calderas (from my book, Roadside Geology of Idaho) 04:08 generalized model of Yellowstone caldera eruptions (also from same book) 09:25 tour of Henrys Fork caldera rim 11:15 intracaldera basalt flow 13:41 Mesa Falls Tuff along caldera flank (just outside caldera) You can order SIGNED copies of my books that cover this area: Geology Underfoot in Southern Idaho (a whole chapter on this area) and Roadside Geology of Idaho. Purchase here: https://shawn-willsey.square.site/