Learn about ancient strata volcanoes and how grizzlies find them
Link to Part 1    • Hundreds of Walls Lead to Evidence of...  

Special thanks to Rob Christiansen for grizzly footage

Special thanks to Jakob Ruffner for GIS work

Shawn Willsey YouTube channel
   / @shawnwillsey  

Fossil woods of Yellowstone National Park by Elisabeth A. Wheeler

Geology of Yellowstone National Park
Petrified Forests
Grizzley Bears
Grizzley Bear Habitat
Yellowstone Lake
Lahars
Tuff
Montserrat Island Volcano
Supervolcano
Strata Volcanoes
Composite volcano