Emerald Lake, Carcross

We were very fortunate that the day we drove by the sun was out and we were able to see the blue-green colours that have given this lake its name. The colours are created by sunlight reflecting off a white layer of “marl” on the lake bed. The marl itself is a white calcium carbonate clay that is formed when enough carbonate from dissolved limestone reacts with calcium in the water. The resulting clay then settles, often unevenly on the lake bed.Читать далее