Spotted Lake is a saline endorheic alkali lake located northwest of Osoyoos in British Columbia. It is located near the city of Osoyoos, beside Highway 3.Spotted Lake is very highly concentrated with numerous different minerals. It contains some of the highest quantities (in the world) of magnesium sulfate, calcium and sodium sulphates. It also contains extremely high concentrations of 8 other minerals as well as some small doses of four others such as silver and titanium.
Most of the water in the lake evaporates over the summer, leaving behind all the minerals. Large “spots” on the lake appear and depending on the mineral composition at the time, the spots will be different colors. The spots are made mainly of magnesium sulfate, which crystallizes in the summer. In the summer only the minerals in the lake remain, and they harden to form natural “walkways” around and between the spots.
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