GEL 107 (15)

GEL 107 (15) - 1 GEL107: PALEOBIOLOGY Lecture 16: Plants O...

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Unformatted text preview: 1 GEL107: PALEOBIOLOGY Lecture 16: Plants O 2 O 2 What are seed plants and when did they appear? What are vascular plants and when did they appear? When did plants emerge and in what form? How and when did atmospheric oxygen appear? What are the major groups of plants? What are angiosperms and when did they appear? The Goldilocks Effect Differentiation and evolution of Earth Denser material sinks, lighter material rises Core, mantle, crust, hydrosphere, atmosphere Young, ultrahot Earth Formation of Earths earliest solid 2 Volcanic outgassing Earths first ocean Chlorofluorocarbons (CFCs) Sulfur dioxide (SO 2 ) Ozone (O 3 ) Neon (Ne) Methane (CH 4 ) Carbon monoxide (CO) Carbon dioxide (CO 2 ) Argon (Ar) Oxygen was absent before 2.5 Ga. Stromatolite Cyanobacteria Photosynthesis Oxygen Warrawoona Group Western Australia 3.5 billion years ago 3 2.45 1.85 0.85 0.54 Why is there a time lag? Atmospheric oxygen level compared to today Stromatolite Atmospheric oxygen billion of years before present 3.5 BIF (Banded Iron Formation) The ocean at the time Suspended iron Suspended silica Deposited as Chert Deposited through oxidization Captures O 2 2.45 1.85 0.85 0.54 Atmospheric oxygen level compared to today Atmospheric oxygen Stromatolite BIF Production billion of years before present 3.5 Stromatolite Atmospheric Oxygen 2.45 Ga What are seed plants and when did they appear?...
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This note was uploaded on 12/13/2009 for the course GEL GEL 107 taught by Professor Jishin during the Spring '09 term at UC Davis.

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GEL 107 (15) - 1 GEL107: PALEOBIOLOGY Lecture 16: Plants O...

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