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Secluded Lake Hillier is a Bubble Gum Pink

2
  • by Daniel Kelly
  • — January 23, 2014
hutt_lagoon

Australia’s Hutt Lagoon. (Credit: Samuel Orchard via Creative Commons)

Australia’s Recherche Archipelago is home to 105 uninhabited islands that make up a nature reserve. Big and small alike, some support sea lions and waterfowl. Others just get in the way of shipping vessels. But there is one with something no other has: a pink lake.

It’s called Lake Hillier, and while it’s not the only pink lake in the world, it is one of the least studied due to its remote location. Most people – the majority of which are tourists – only see it from the seat of a circling plane.

Lake Hillier joins a short list of pink lakes around the world, most commonly full of salty water and color-producing algae. They include the likes of Lake Retba in Senegal and Masazir Lake in Azerbaijan.

Lake_eyre

Australia’s Lake Eyre as seen from the sky. (Credit: HiltonJ via Wikimedia Commons)

So there is a presumption, but no confirmation, that what makes other lakes pink is what gives Lake Hillier its bubble-gum hue as well:

  • Red halophilic bacteria in salt crusts;

  • Dyes released from Dunaliella salina (a type of algae);

  • Or a unique composition of surrounding rock (e.g. glacial rock)

Despite the strange color, Lake Hillier’s water is thought to be safe for swimming. It has been collected before by wading visitors who found that the water stayed pink in their jars, ruling out a trick of the light.

Other pink lakes, like Retba, have very high salt contents (some of its salt is mined). And other salty waters, like the Dead Sea, increase buoyancy. So water in Lake Hillier might make for easy floating as well.

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2 Comments

  1. Extremophiles: Life on Mars and What Causes Magenta Lakes | Shout Out Science! says:
    June 9, 2014 at 10:20 PM

    […] “Secluded Lake Hillier is a Bubble Gum Pink” Lake Scientist. January 23, 2014 […]

    Reply
  2. Why Lake Hillier Is Pink - Lake Scientist says:
    March 29, 2016 at 4:17 PM

    […] than two years ago, we speculated as to why Australia’s Lake Hillier is such a spectacular pink. At the time, a type of color-producing algae, Dunaliella salina, was at the top of our list. So […]

    Reply

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