Emerald Lake is a lake in the southern

Yukon Yukon () is a Provinces and territories of Canada, territory of Canada, bordering British Columbia to the south, the Northwest Territories to the east, the Beaufort Sea to the north, and the U.S. state of Alaska to the west. It is Canada’s we ...

, notable for its intense green colour. It is located on the South

Klondike Highway The Klondike Highway is a highway that runs from the Alaska Panhandle through the province of British Columbia and the territory of Yukon in Canada, linking the coastal town of Skagway, Alaska, to Dawson City, Yukon. Its route somewhat ...

at kilometre 117.5 (mile 73.5), measured from

Skagway The Municipality and Borough of Skagway is a borough in Alaska on the Alaska Panhandle. As of the 2020 census, the population was 1,240, up from 968 in 2010. The population doubles in the summer tourist season in order to deal with the large ...

, Alaska. The colour derives from light reflecting off white deposits of

marl Marl is an earthy material rich in carbonate minerals, Clay minerals, clays, and silt. When Lithification, hardened into rock, this becomes marlstone. It is formed in marine or freshwater environments, often through the activities of algae. M ...

, a mixture of

clay Clay is a type of fine-grained natural soil material containing clay minerals (hydrous aluminium phyllosilicates, e.g. kaolinite, ). Most pure clay minerals are white or light-coloured, but natural clays show a variety of colours from impuriti ...

and

calcium carbonate Calcium carbonate is a chemical compound with the chemical formula . It is a common substance found in Rock (geology), rocks as the minerals calcite and aragonite, most notably in chalk and limestone, eggshells, gastropod shells, shellfish skel ...

, at the bottom of the shallow waters. The high concentration of calcium carbonate in the water here comes from

limestone Limestone is a type of carbonate rock, carbonate sedimentary rock which is the main source of the material Lime (material), lime. It is composed mostly of the minerals calcite and aragonite, which are different Polymorphism (materials science) ...

gravels eroded from the nearby mountains and deposited here 14,000 years ago by the

glacier A glacier (; or ) is a persistent body of dense ice, a form of rock, that is constantly moving downhill under its own weight. A glacier forms where the accumulation of snow exceeds its ablation over many years, often centuries. It acquires ...

s of the last ice age. Glacial erosion was likewise responsible for scooping out the shallow lakebed. Natural

hypoxic Hypoxia means a lower than normal level of oxygen, and may refer to: Reduced or insufficient oxygen * Hypoxia (environmental), abnormally low oxygen content of a specific environment ** Hypoxia in fish, responses of fish to hypoxia * Hypoxia (medi ...

conditions during the summer may contribute to carbonate deposition and marl formation.

References

External links

Sights and Sites: Yukon Points of Interest Signage.

This Emerald Lake Just Over The Border From Alaska Is So Breathtaking It’s Unreal
Lakes of Yukon {{Canada-lake-stub