Tom Miner Basin Montana Petrified Wood Limb slab Old Collection. Bryant Washburn collection of Utah. 6.25″×6″ and 1/4 thick. The Gallatin Petrified Forest, just north of Yellowstone National Park in Tom Miner Basin, contains petrified wood from what is called the Sepulcher Formation (the Petrified Tree in the Lost Lake area is also a member). […]