Directions - Coming south from Flagstaff on I-17, as you enter the Verde Valley, follow the signs. The site is about 10 minutes off the highway.
Background - This area is home to the Verde Formation, a Cenozoic calcite-rich rock formed from the 'photosynthetic activity of freshwater plants.'(Nations, 51) Note: Most limestone is deposited inorganically as a slow precipitate when CO2 is drawn out of the atmosphere.
The National Park Service has provided a good geologic explanation on their trailside signs, so click on the images for the geologic background.
Introduction | Verde Salt Mine | Schnebly Hill | Overnight | Cinder Cones | Grand Falls