<span>The water in Lake Nyos is normally a beautiful, deep-blue color. However, the post-eruption of Lake Nyos made the water murky reddish brown. This is apparently formed by the oxidation of iron-rich bottom waters that were carried up to shallower lake levels during the hydrovolcanic eruption. </span>It had been known for years that the water in Lake Nyos was extremely enriched in dissolved CO2 at the <span>bottom of the lake. Thus, a CO2 "eruption" occured.</span>
