AAOCEAN_OM - The Hoba Meteorite, in Namibia EARLY...

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    Welcome to Earth Science -that includes continents, oceans, and atmospheres-
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    OUR UNIVERSE:     What is it?   When Did it Form?      Astrophysicists estimate      13.7 Ga (Billion Years      Before Present)     What is it Made From       Stars are element-making       infernos. Supernovas       needed for all elements       heavier than iron. OUR SOLAR SYSTEM:    What is it?    Where is it?    When Did it Form?        Evidence says 4.6 Ga      What is it Made From?         Density stratified solids,          liquids, and gases. OUR EARTH  What is it made of?  When did all this occur?
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    Matthew Horrigan (aka Ocean  Matt) Contact Me   informally after class, by appointment,  or by office hours email: sabu@sfsu.edu Voicemail: 415-405-2113 www.georoots.org/ocean102
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Unformatted text preview: The Hoba Meteorite, in Namibia EARLY ATMOSPHERE MAJOR N 2 (nitrogen) CO 2 (carbon dioxide) H 2 O (water) MINOR CH 4 (methane) NH 3 (ammonia) CO (carbon monoxide) SO 2 (sulfur dioxide) H 2 S (hydrogen sulfide) HCN (hydrogen cyanide) Hot! MAJOR 78% N 2 (nitrogen) 21% O 2 (oxygen) MINOR 0-4% H 2 O (water) 0.9% Ar (Argon) 0.035% CO 2 (carbon dioxide) Cooler, but getting hotter now CURRENT ATMOSPHERE Stromatolites alive today in Australia Stromatolites alive 3 billion years ago Banded Iron Formation in Canada (old rocks) Time travel analogy. If all of Earths lifetime were a trip across the USA from west to east, where would we show up?...
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AAOCEAN_OM - The Hoba Meteorite, in Namibia EARLY...

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