Hydrogen Sulfide layers in water

[LKunze]

Thanks for the info Tami.  Several of the Cuyuna pits near Brainerd MN have the Hydrogen Sulfide layer... or what some of us like to call the Rootbeer layer.  The layer seems to change from year to year and pit to pit at varying depths and in some cases it has been close to 10 feet thick.  It's strange because often times if you go through it the water is gin clear below the layer but no ambient light is able to penetrate it.