Muncho Lake (from the lookout)
(I'm sure the water looks much more blue-green when it is sunny.)
Glacial flour consists of fine-grained, silt-sized particles of rock, generated by mechanical grinding of bedrock during glacial erosion. Because the material is very small, it becomes suspended in meltwater making the water appear cloudy or milky.
When the tiny glacial sediments enter a river, they turn it grey, light brown, iridescent blue-green, or milky white depending on the type of rock in the area. If the river flows into a glacial lake, the lake may appear turquoise in colour as a result of the tiny suspended particles in the lake water. The suspended glacial flour reflects and scatters sunlight, returning mainly the blue-green part of the spectrum to our eyes.
At the posted coordinates there are some information signs, use them to answer the following questions.
1) Munch Lake is the longest freshwater lake in the Northern Rockies. How long is it?
2) Glacial flour particles are tiny. What size are they in both microns and millimetres?
3) What is another name for glacial flour?
4) What colour does the water look to you on the day you visited? Why do you think it is that colour?
5) Mandatory Post a photo of yourself at the Lookout, with Muncho Lake in the background.