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Recursion

(56,582 posts)
Wed Oct 2, 2013, 02:23 AM Oct 2013

Creepy lake in Tanzania turns animals into stone

Well, into lime, I guess; it's calcium. Still, "Lake Medusa" or "Lake Basilisk" sounds cool. (It's actually called Lake Natron).

Creepy pictures at the link:

http://www.newscientist.com/article/mg21929360.100-deadly-lake-turns-animals-into-statues.html

ACCORDING to Dante, the Styx is not just a river but a vast, deathly swamp filling the entire fifth circle of hell. Perhaps the staff of New Scientist will see it when our time comes but, until then, Lake Natron in northern Tanzania does a pretty good job of illustrating Dante's vision.

Unless you are an alkaline tilapia (Alcolapia alcalica) – an extremophile fish adapted to the harsh conditions – it is not the best place to live. Temperatures in the lake can reach 60 °C, and its alkalinity is between pH 9 and pH 10.5.

The lake takes its name from natron, a naturally occurring compound made mainly of sodium carbonate, with a bit of baking soda (sodium bicarbonate) thrown in. Here, this has come from volcanic ash, accumulated from the Great Rift valley. Animals that become immersed in the water die and are calcified.

Photographer Nick Brandt, who has a long association with east Africa – he directed the video for Michael Jackson's Earth Song there in 1995 – took a detour from his usual work when he discovered perfectly preserved birds and bats on the shoreline. "I could not help but photograph them," he says. "No one knows for certain exactly how they die, but it appears that the extreme reflective nature of the lake's surface confuses them, and like birds crashing into plate glass windows, they crash into the lake."
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Creepy lake in Tanzania turns animals into stone (Original Post) Recursion Oct 2013 OP
Not sure if it is calcium, and so therefore lime muriel_volestrangler Oct 2013 #1
Ah, that makes more sense Recursion Oct 2013 #2

muriel_volestrangler

(101,321 posts)
1. Not sure if it is calcium, and so therefore lime
Wed Oct 2, 2013, 05:58 AM
Oct 2013

The article does say 'calcified' at one point; but the rest of it is all about sodium compounds - as is the name, 'Natron' (like the 'Na' of the symbol for sodium).

https://en.wikipedia.org/wiki/Lake_Natron
https://en.wikipedia.org/wiki/Natron

They may have just said "calcified" as a general "covered in minerals" term.

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