"Spot the Rock" February 13, 2014

It’s Thursday, and time for another “Spot the Rock” challenge! Let’s see how many of you can guess where this is!

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UPDATE: Location Revealed

Alhambra Rock is a diatreme seen to the west of Scenic Byway 163 is southeastern Utah just south of Mexican Hat. Explosive Tertiary volcanic events created diatremes, which are volcanic necks or plugs. Small vents erupted pulverized rock and gas from the magma chamber to the earth’s surface. The magma-filled vents cooled and hardened, and were covered by sediments that later eroded. The remaining volcanic necks now stand in stark outline above the surrounding landscape. Diatremes are present along Comb Ridge, and are also in adjacent states, and include the famous Shiprock in northwestern New Mexico. You can read more about the surrounding area in our “Canyon County” pamphlet (pdf) here: http://1.usa.gov/1cqMLQ9