1. The Late Archean biosphere: Implications of organic and inorganic geochemistry of marine shales and terrestrial paleosols Open Access Author: Watanabe, Yumiko Title: The Late Archean biosphere: Implications of organic and inorganic geochemistry of marine shales and terrestrial paleosols Graduate Program: Geosciences Keywords: geochemistrybiosphereorganic mattershaleArcheanpaleosol File: Download YumikoWatanabethesis.pdf Committee Members: Blair Hedges, Committee MemberHiroshi Ohmoto, Committee Chair/Co-ChairKatherine Haines Freeman, Committee MemberMichael Allan Arthur, Committee Member