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Emerald Lake must surely be one of the most photographed sites in the Yukon. Stop here and admire the stunning view, take a couple snapshots and learn about the area and the formation on this and other similar lakes in the Yukon. Be sure also to take in Carcross desert and pop into the town of Carcross to see the historic White Pass and Yukon Route Railway.
There is no accepted definition of a lake but these are generally recognised as bodies of standing water greater than 0.25 hectares.
Lakes can be classified by their trophic status.
Oligotrophic lakes are base-poor, usually upland sites that support few plants.
Eutrophic lakes tend to occur in lowland areas. They have high levels of nutrients that often results in algal blooms, which cloud the water depriving aquatic plants of light and under extreme circumstances lead to the deoxygenation of the system.
Mesotrophic lakes are intermediate between the two classes.
Brackish lakes have low levels of saltwater input.
In addition to these general categories, there are also two rare types of lake, marl lakes and Turloughs.
Marl lakes are base rich (calcareous) and nutrient poor and are characterised by clear water, deposits of calcium phosphate (marl) and charophytes (calcareous algae).
Turloughs are seasonal lakes that occur in areas where there is low-lying limestone that is flooded in winter due to the increased level of the water table. This then dries out in summer when the water table is lower.
references: Nelson B, Thomson R and Morrow C - Ulster Museum
PLEASE RESPECT THAT I HAVE OVER 40 CACHES THAT GET VISITED REGULARLY. IT IS ACCEPTABLE TO LOG YOUR CACHE AS FOUND ONLY WHEN YOU SEND ME YOUR ANSWERS - ANY DELAY IN SENDING ANSWERS WILL RESULT IN A DELETED LOG.
To log this cache please send answers to the questions below to the cache owner.
1. What type of lake is Emerald Lake?
2. What causes the beautiful colours in the lake?
3. The habitat is changing in this area. Read the plaques at the look out point and give an example of how a changing habitat has contributed to a significant impact on the areas flora, fauna and animal or insect life.
4. Take a picture at the site with showing your gps.
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Coordinates are in the WGS84 datum