Explore the Great Oxidation Event (GOE) in this comprehensive 21-minute video. Learn about its timing, causes, and evidence, including fossil records, continental oxidation, banded iron formations, and isotopic data. Discover how cyanobacteria triggered the rise of oxygen 2.4-2.1 billion years ago and its impact on Earth's atmosphere and oceans. Delve into carbon isotope excursions, sulfur isotope fractionation, and molybdenum isotopes' sensitivity to redox conditions. Understand the Canfield Ocean concept and why it took so long for the Cambrian explosion to occur after Earth's oxygenation. Examine the GOE's effects on biological evolution and explore subsequent oxidation events in Earth's history.
Overview
Syllabus
Table of contents
What is the GOE?
When was the GOE?
Why did the GOE happen?
What is our evidence for the GOE?
What the fossils tell us?
Oxidation of continental rocks rusting
What are BIFs? Do BIFs provide evidence for GOE?
C isotope excursions weird C isotope spikes
Major change in S isotope fractionation!
What Mo isotopes tell us?
How did the GOE affect biology/evolution?
The Canfield Ocean! still no O in ocean after GOE?
Have there been other oxidation events?
Why *DIDN'T* animals evolve right after the GOE?
Taught by
GEO GIRL
