New Ediacaran fossils (Introduction)

by David Turell , Wednesday, February 23, 2011, 18:00 (4812 days ago) @ BBella

A new entry in the Cambrian debate. Plancton caused the huge jump in oxygen in the atmosphere:
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> > http://wattsupwiththat.com/ 2/22/11
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> I read this article and it seems to say that upheavals in the earths crust (volcanic activity/earthquakes?) is what created the increase in plankton that caused more oxygen. Does this then mean when we have earthquakes and volcanic activity now more oxygen is a by-product? We sure could use more O2!-Volcanoes are a major source of CO2. Co2 and plankton use photosysthesis to make oxygen. Oxygen is about 20% of our atmosphere, and hasn't changed much in many many centuries. Cyanobacteria also make oxygen the same way, and appear early in evolution and are being studied to understand evolution.- http://www.the-scientist.com/news/display/58023/