Life on a Mesoarchean marine shelf – insights from the world's oldest known granular iron formation. - Smith, Albertus J. B.; Beukes, Nicolas J.; Gutzmer, Jens; Johnson, Clark M.; Czaja, Andrew D.; Nhleko, Noah; de Beer, Frikkie; Hoffman, Jakobus W.; Awramik, Stanley M. (Scientific Reports, 2020)