Model of present-day and late Archean weathering and world-average river water.
Late Archean weathering formed Fe(II)-rich carbonate and clay minerals.
Detrital pyrite, siderite, and uraninite stable during late Archean weathering.
Late Archean riverwater had high Fe(II) and C, and low S and pH.
Archean weathering environment may contribute to haze formation.