Lecture 7: Geologic History of Life Oldest signatures of life in sedimentary rocks: Microfossils...

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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 A fossil cyanobacterium in circa 1.5 Gyr old sedimentary rocks - (A.

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Transcript of Lecture 7: Geologic History of Life Oldest signatures of life in sedimentary rocks: Microfossils...

Page 1: Lecture 7: Geologic History of Life Oldest signatures of life in sedimentary rocks: Microfossils Molecular fossils (mainly lipids) Stromatolites C and.

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 cyanobacteriumin circa 1.5 Gyr old sedimentary rocks - (A. Knoll).

Page 2: Lecture 7: Geologic History of Life Oldest signatures of life in sedimentary rocks: Microfossils Molecular fossils (mainly lipids) Stromatolites C and.

Signatures of early life on Earth

• Molecular Fossils and the rise of eukaryotes.

Sterol biosynthesis - A. Pearson, J.Brocks, M.Budin (2003)

Page 3: Lecture 7: Geologic History of Life Oldest signatures of life in sedimentary rocks: Microfossils Molecular fossils (mainly lipids) Stromatolites C and.

Stromatolites

Page 4: Lecture 7: Geologic History of Life Oldest signatures of life in sedimentary rocks: Microfossils Molecular fossils (mainly lipids) Stromatolites C and.

Phylogenetic Tree of Life

The 3 Domains of Life- Fig.2.1 - A. Knoll (2003).

Page 5: Lecture 7: Geologic History of Life Oldest signatures of life in sedimentary rocks: Microfossils Molecular fossils (mainly lipids) Stromatolites C and.

Phylogenetic Tree of Life

Page 6: 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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Stromatolites lecture

Stromatolites lecture

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