Considering the Casa Sedona in Sedona?
A VT member wrote the following comment about visiting Sedona:
The youngest rocks, deposited... by Gypsystravels
The youngest rocks, deposited approximately 5 millon years ago, located at the top of the 'Switch Backs' in Oak Creek Canyon are volcanic in origin. They are characterized as a relatively thin layer of hard, dark gray basalt, that flowed down from the flanks of Mount Humphries, about 30 miles to the north.