Why is the water in Niagara Falls green?



The Niagara River's striking green or bluish color is a visual reminder of its raw power. Every minute, a staggering 60 tons of dissolved minerals, primarily sourced from the limestone bedrock, plunge over the falls. This unique hue is created by the combination of dissolved salts and finely ground rock particles, known as "rock flour," which are eroded from the limestone and underlying shale and sandstone layers.


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