The alkaline water in Lake Natron has a pH as high as 10.5 and is so caustic it can burn the skin and eyes of animals that aren't adapted to it. The water's alkalinity comes from the sodium carbonate and other minerals that flow into the lake from the surrounding hills. And deposits of sodium carbonate — which was once used in Egyptian mummification — also acts as a fantastic type of preservative for those animals unlucky enough to die in the waters of Lake Natron.
Despite some media reports, the animal didn't simply turn to stone and die after coming into contact with the lake's water. In fact, Lake Natron's alkaline waters support a thriving ecosystem of salt marshes, freshwater wetlands, flamingos and other wetland birds, tilapia and the algae on which large flocks of flamingos feed. Now, photographer Nick Brandt has captured haunting images of the lake and its dead in a book titled "Across the Ravaged Land" (Abrams Books, 2013).
Brandt discovered the remains of flamingos and other animals with chalky sodium carbonate deposits outlining their bodies in sharp relief. "I unexpectedly found the creatures — all manner of birds and bats — washed up along the shoreline of Lake Natron," Brandt wrote in his book. "No one knows for certain exactly how they die, but … the water has an extremely high soda and salt content, so high that it would strip the ink off my Kodak film boxes within a few seconds."
"I took these creatures as I found them on the shoreline, and then placed them in 'living' positions, bringing them back to 'life,' as it were," Brandt wrote, referring to the way he repositioned the animals. "Reanimated, alive again in death."
