Água Ácida

Bernhard Edmaier

ORANGE WATER
"If, as in the Landeyjarsander in south Iceland, melt water from nearby glaciers crosses swamplands, it becomes acidic and dissolves iron minerals from the black volcanic rock, which it then deposits along the bottoms of the channels. This gives the main river and its tributaries their reddish-yellow colour."

http://www.geophot.com/