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.もっと詳しく