we've all seen "root beer foam" usually in rivers below dams or in eddies, etc. While I'm fairly certain its nasty stuff, I have no idea what it actually is. Does anyone know? Be as specific as possible please (ie:like when the 1,1,1,3,3,3 dichloroethylmethoketone butydioxipentanol from Roundup reacts with H20 its produces "root beer foam".) thank you. i do realize it probably takes air/water turbulance to help create it in the first place, but what other factors/ingregients help to form it?