New Oxygen research; from rocks, higher earlier (Introduction)

by David Turell , Saturday, August 27, 2016, 23:24 (3009 days ago) @ dhw


> dhw: I don't know where you get that impression from, since the article does NOT tell us the amount of oxygen during the Cambrian! Here are two more articles:
> 
> 	The Cambrian Period - UCMP
> www.ucmp.berkeley.edu/cambrian/cambrian.php - > 21/08/2016 • The Cambrian Period. ... the oceans became oxygenated. Although there was plentiful atmospheric oxygen by the beginning of the period, ... - > The is information from a 2011 article. My info is current atmospheric measurements from that same time period.. - > And the following refers to research done in 2014:
> 
> When life exploded | Science News for Students
> https://www.sciencenewsforstudents.org/article/when-life-exploded - From your article: "Imagine being able to test drops of actual Precambrian seawater to find out just how much oxygen the oceans contained at a given moment in the distant past. That's what Natalie Spear has done. Last year, this geologist and her team at Pennsylvania State University in State College discovered ancient seawater droplets in Australia. They were trapped in 830 million-year-old salt crystals. When saltwater evaporates, it leaves behind this mineral, called halite." - This is essentially the same salt methodology as my article! With a different result. If my article is correct, then the point remains that oxygen may not be the trigger.