Near where all the trees were dead, I could see what looked like salt formation on the shores. Crossed a fence to check it out. Poked the white surface with a stick. It was not salt. It was a lot of foam!

Now that raises yet another question. How come this portion of the water consistently had foam on the shore as far as the eyes could see? The water was very shallow and relatively still.

Does this mean the water has certain chemicals that makes it foam? And that is what killed the trees?