MSGID: 1:317/3 637fb163   
   PID: hpt/lnx 1.9.0-cur 2019-01-08   
   TID: hpt/lnx 1.9.0-cur 2019-01-08   
    EPOD - a service of USRA   
      
   The Earth Science Picture of the Day (EPOD) highlights the diverse processes   
   and phenomena which shape our planet and our lives. EPOD will collect and   
   archive photos, imagery, graphics, and artwork with short explanatory   
   captions and links exemplifying features within the Earth system. The   
   community is invited to contribute digital imagery, short captions and   
   relevant links.   
      
      
    Below the Wasatch Range’s Storm Mountain   
      
      November 24, 2022   
      
      
       RayB_bigcott832c_19oct22 (002)   
      
       RayB_bigcott837c_19oct22 (003)   
      
      Photographer:  Ray Boren   
      
      Summary Author:  Ray Boren   
      
      Geologic forces spanning millions of years — from  estuarine   
      deposits and metamorphic pressures to mountain building and   
      never-ending erosion — are exposed in beautiful  Big Cottonwood   
      Canyon, a cleft in the  Wasatch Range southeast of Salt Lake City,   
      Utah. Accessible examples of these phenomena are found alongside a   
      graceful curve in the canyon highway below ominously named Storm   
      Mountain. Here, tinted in shades of oxidized red and darker black, are   
      layered  Big Cottonwood Formation rocks, as illustrated in the first   
      photo, taken on October 19, 2022.   
      
      The eye-catching outcrops at  Storm Mountain include  quartzite,   
      a dense, quartz-rich sandstone, and  argillite, a clay-rich   
      mudstone. The layers were originally laid down over 720 million years   
      ago, during the  Neoproterozoic. They were subsequently uplifted,   
      folded and steeply tilted beginning about 75 million years ago,   
      creating this rugged landscape. The quartzites were originally   
      deposited in rivers and tidal channels, while the argillite comes from   
      calmer deposits — both evidence of an ancient, seaside estuary that   
      preceded the mountains themselves.   
      
      A second photograph, taken the same day from below an overhang in the   
      rocks and above the curving highway, partly shows Storm Mountain’s   
      steep, craggy face, to the left. The peak rises some 2,100 feet (700   
      meters) above the canyon, topping out at 9,528 feet (2,904 meters)   
      above sea level. The perspective also hints at the  season under   
      way: The leaves of stream-side mountain maples, cottonwoods, oaks and   
      other deciduous trees and bushes have turned autumnal shades of red and   
      yellow, for their production of  chlorophyll has ceased with the   
      arrival of fall’s cooler temperatures and shorter days.   
      
      
      Big Cottonwood Canyon, Utah Coordinates: 40.6373 -111.6330   
      
      
   Related EPODs   
      
       Below the Wasatch Range’s Storm Mountain  Beautiful Alpine Lakes   
      in the Sierra Nevada Range  Quechee Gorge in East Central Vermont   
       Limestone Stratification near Modica, Sicily  Strawberry Moon   
      and Etna Exhaust  Kodachrome Basin State Park, Utah   
       More...   
      
   Geography Links   
      
        *  Atlapedia Online   
        *  CountryReports   
        *  GPS Visualizer   
        *  Holt Rinehart Winston World Atlas   
        *  Mapping Our World   
        *  Perry-Castañeda Library Map Collection   
        *  Types of Land   
        *  World Mapper   
      
   -   
      Earth Science Picture of the Day is a service of the  Universities   
      Space Research Association.   
      
   https://epod.usra.edu   
       
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