The water owes its brilliant azure color to glacial silt, which is also known as "rock flour." This fine stone powder absorbs the shortest wavelengths of light — the purples and indigos — and ...

Peyto Lake, located in Banff National Park, Canada, is known for its striking turquoise blue colour which comes from glacial rock flour suspended in the water ...

As glacial ice moves very slowly downhill ... These rocks grind together, creating tiny grains of dust, called rock flour. Some glaciers flow all the way to the sea and when they get there ...