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Origin
Site 1
Origin site 1 corresponds to the intersection in Gonzales-Toril (2001) and represents the site where the waters from all three major sources come together before the water passes under the roadway (pH 2.7, 9.6 g Fe/L).
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Site 2
Site 2 is a yellow pool below the wall and corresponds to Gonzales-Toril site I (pH 2.9, 0.8 g Fe/L).
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Site 3
Site 3 is the small deep red stream coming out from Peņa del Hierro and corresponds to Gonzales-Toril site II (pH 1.8, 19.8 g Fe/L).
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