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Rounding the corner near Inkom ID, home of the smallest airport in the world, Simko Field Airport 1ID9, with a runway length of 400 feet. Snow Peak in left background left and Haystack Mountain to the right of it.
As you continue around the corner you will see more of this volcanic geology. It's pretty cool to look at as the valley opens up for some even more spectacular views.
A pair of stacked basalt flows known as the Portneuf (or Inkom) basalts were from two shoestring-like flows erupted from somewhere in the Blackfoot- Gem Valley volcanic field. and flowed a minimum of 100 km west through canyons in the Portneuf and Bannock Ranges as well as across the Gem, Marsh and Portneuf valleys, reaching the south edge of Pocatello, Idaho. These Portneuf basalt flows are the oldest yet dated in the Gem Valley part of the volcanic field. http://www.seanpatricklong.com/uploads/ ... eo_map.pdf
As you continue around the corner you will see more of this volcanic geology. It's pretty cool to look at as the valley opens up for some even more spectacular views.
A pair of stacked basalt flows known as the Portneuf (or Inkom) basalts were from two shoestring-like flows erupted from somewhere in the Blackfoot- Gem Valley volcanic field. and flowed a minimum of 100 km west through canyons in the Portneuf and Bannock Ranges as well as across the Gem, Marsh and Portneuf valleys, reaching the south edge of Pocatello, Idaho. These Portneuf basalt flows are the oldest yet dated in the Gem Valley part of the volcanic field. http://www.seanpatricklong.com/uploads/ ... eo_map.pdf