More likely salt. See National Geographic Magazine Jan 2012 p116.
These are algal reefs, formed when the lake level was up to the top of these "chimney". Similar reef calcium carbonates "peaks" are found in Mono Lake and on the southern end of Searles Lake in California, USA.
Fantastic view. L+F
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Photo taken in As Evla, Djibouti
Misplaced? Suggest new location