High-res Notes: 2 4/13/12 — 3:19pm Short URL: http://tmblr.co/ZNHvKyJbrKtd Filed under: #18-200mm  #2010  #Canyon district  #Grand Canyon of the Yellowstone  #Mineral stains  #Missouri River  #North Dakota  #Upper Falls  #Yellowstone river  #arun yenumula  #biosphere  #canyon  #canyon junction  #canyon rim  #canyon walls  #chemistry  #colors  #d40x  #ecological zone  #ecosystem  #grand canyon  #greater yellowstone ecosystem  #hot spot  #hot spring  #hydrothermal alteration  #iron  #iron compounds  #lower falls  #montana  #nature