GLACIAL MILK

But first- Geology lesson. Glacial Milk is created when glacial erosion or grinding occurs on bedrock and creates silt-sized particles, or rock/glacial flour, that is then suspended in the glacial meltwater creating a cloudy or "milky" appearance. Here's where things get colorful. The Rock Flour is so fine that it doesn't sink to the bottom of the lake. Instead, it remains suspended throughout the water. When sunlight hits, the water absorbs the long wave colors of the spectrum: At the same time, the rock flour absorbs some of the shortest light waves, then scatters the remaining light back to our eyes. Thanks to these processes, the reflected light is mostly a milky turquoise or blue. In ...View all