POTD October 24, 2013: Devil's Playground, Grouse Creek Mountains, Box Elder County, Utah

Devil’s Playground, Grouse Creek Mountains, Box Elder County, Utah
Photographer: Don Clark

After a storm, evening light washes over granitic rocks of Devils Playground in the southern Grouse Creek Mountains. The granitic rocks of the Emigrant Pass pluton were emplaced in phases from 41 to 34 million years ago and intrude metamorphosed sedimentary rocks.