Tag Bishop

The Bishop Tuff is one of the more unique volcanic formations in the world. It was formed over 700,000 years ago when an explosion settled tons of ash over Owens Valley and then covered the ash with molten lava. The heat from the lava converted the ash into rock. While the Tuff stretches between both Mono and Inyo counties, the point of greatest interest is where the Tuff comes up against Lake Crowley. Here, continuous wear from the lake's tides has cut away at the weaker ash-stone to form columns, pillars, and even caves.