Nano−porous pyrite and organic matter in 3.5-billion-year-old stromatolites record primordial life

  title={Nano−porous pyrite and organic matter in 3.5-billion-year-old stromatolites record primordial life},
  author={Raphael J. Baumgartner and Martin J. Van Kranendonk and David Wacey and Marco L. Fiorentini and Martin Saunders and Stefano Caruso and Anais Pag{\`e}s and M. Homann and Paul Guagliardo},
Stromatolites of the ∼3.5 billion-year-old Dresser Formation (Pilbara Craton, Western Australia) are considered to be some of Earth’s earliest convincing evidence of life. However, uniquely biogenic interpretations based on surface outcrops are precluded by weathering, which has altered primary mineralogy and inhibited the preservation of microbial remains. Here, we report on exceptionally preserved, strongly sulfidized stromatolites obtained by diamond drilling from below the weathering… 

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