Origins of water, atmosphere, life. outline Age of the earth The Hadean Oldest rocks & water Early atmosphere & earliest fossils Oxygenated atmosphere.

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Presentation transcript:

Origins of water, atmosphere, life

outline Age of the earth The Hadean Oldest rocks & water Early atmosphere & earliest fossils Oxygenated atmosphere and life

Ray Troll PHANEROZOIC

PRE- CAMBRIAN

SODA!

Hadean Archean Proterozoic Phanero

Hadean Hadean Archean Proterozoic Phanero

Hadean Hadean Archean Proterozoic Phanero

Hadean Hadean Archean Proterozoic Phanero

The Essential Elements

Oldest rocks ~4byo Mineral evidence from oceans: 4byo Hydrothermal activity No mountains Very little “land” LOTS of volcanoes Hadean Archean Proterozoic Phanero

Oldest rocks ~4byo Mineral evidence from oceans: 4byo Hydrothermal activity No mountains Very little “land” LOTS of volcanoes Hadean Archean Proterozoic Phanero

Prokaryotes (and Archaea) Hadean Archean Proterozoic Phanero

Entophysalis Hadean Archean Proterozoic Phanero

Hadean Archean Proterozoic Phanero

We love carbon dioxide! Hadean Archean Proterozoic Phanero

How do we know?

Hadean Archean Proterozoic Phanero

Hadean Archean Proterozoic Phanero

Hadean Archean Proterozoic Phanero

Summary Oceans formed early Early atmosphere was toxic (to us…) Early life photosynthesized and poisoned the atmosphere

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