rio tinto mineral-laden water in the mining area of minas de rio tinto huelva province, andalusia, spain

abstract acid acidic acidity aerobic analogue andalusia andalusian background bacteria beauty biology chalcopyrite color colorful colors conditions contrast deposits design earth effect environment foreground interest iron landscape mars martian metals microorganisms minerals mining natural nature people photography planet red reddish rio river rock sand scientific sediments spain stones sulfuric textured tinto unique vibrant water without