Mystery Solved: Aerial view of a solar saltern facility near the Great Salt Lake in Grantsville, Utah. The red-orange color of the salt crystallization pans is due to dense blooms of halophilic microorganisms. David J. Crowley
I saw this in the flight from Seattle WA to Austin TX, I don't have idea what it is... July 2012
So I guess the fields are actually some kind of water/chemical reclamation pools or something on the north side of the Great Salt Lake.
Massive evaporation ponds, each over a mile long, line the eastern shore of the Great Salt Lake. There the GSL Minerals Corporation "draws naturally occurring brine from the lake into shallow ponds and allows solar evaporation to produce sulfate of potash, as well as salt and magnesium chloride minerals. Sulfate of potash is a specialty fertilizer that improves the yield and quality of high-value crops such as fruits, vegetables, tea, tree nuts and turf grasses."
Informaciòn obtenida de pixelfish.