Mark van Zuilen2 articles listing Mark van Zuilen in PNAS, indexed by Paperzzz from Crossref and OSF.Direct dating of 3.5 Ga biogenic carbon in a microbial mat remnant, Singhbhum Craton, India PNASRevisiting the Eoarchean Akilia quartz-pyroxene rock with potassium isotopes: Implications for early-ocean sedimentation PNAS