Lecture 7: Geologic History of Life Oldest signatures of life in sedimentary rocks: Microfossils Molecular fossils (mainly lipids) Stromatolites C and.

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Presentation transcript:

Lecture 7: Geologic History of Life Oldest signatures of life in sedimentary rocks: Microfossils Molecular fossils (mainly lipids) Stromatolites C and S isotopic signatures Pattern of nested similarity A fossil cyanobacterium in circa 1.5 Gyr old sedimentary rocks - (A. Knoll).

Signatures of early life on Earth Molecular Fossils and the rise of eukaryotes. Sterol biosynthesis - A. Pearson, J.Brocks, M.Budin (2003)

Stromatolites

Phylogenetic Tree of Life The 3 Domains of Life - Fig A. Knoll (2003).

Phylogenetic Tree of Life

Science, 2006

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