https://en.wikipedia.org/wiki/Blue-green#/media/File:Peyto_Lake_(7631770462).jpg

on the other hand...my sixth sense is telling me that somebody had wanted to dig up the following photo, again....peyto lake 7631770462....go figure:

https://en.wikipedia.org/wiki/Rock_flour

and what is glacial flour, you might ask?

"The SEER Centre in Scotland is a leading source of information on the use of rock dusts and mineral fines."