Early Oxygen Rich Atmosphere? Origins Of Sulfur In Rocks Tells Early Oxygen Story
Monday, April 20, 2009 - 18:14
in Earth & Climate
Sedimentary rocks created more than 2.4 billion years ago sometimes have an unusual sulfur isotope composition thought to be caused by the action of ultra violet light on volcanically produced sulfur dioxide in an oxygen poor atmosphere. Now geochemists can show an alternative origin for this isotopic composition that may point to an early, oxygen-rich atmosphere.