I am not a glaciologist but I do know in late fall or early spring our river waters are beautiful and clear. Spring “thaw” happens and they become heavily laden with glacial “flour” and I suspect our river valley’s filled from eons of river flow. (Google “Glacial Flour”)
Glaciers move and grind through mineral deposits changing mineral content in river outflow! Thanks Mother Nature!
However, after thousands of years of glacial action, our Salmon keep…
