Tag Archives: oxygen

‘Purple mats’ may be the key to increase in oxygen 2.4 billion years ago

Sinkhole_Hoyt_May 30 -31_2012__126 (2)Sinkholes in Lake Huron could hold clues to the oxygenation of Earth 35 hundred million years ago.

That’s because the sinkholes are home to purple mats – microbial organisms that are distant cousins of some of the first life on Earth.

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