Interesting May 12, 2016 article in Cosmos describing how micrometeorites are used for oxygen signatures in Earth’s atmosphere 2.7 billion years ago by examination of certain types of iron oxide minerals.
https://cosmosmagazine.com/earth-sciences/lava-and-meteorites-unveil-ancient-earths-atmosphere?utm_source=Today+in+Cosmos+Magazine&utm_campaign=2105cb79b2-RSS_EMAIL&utm_medium=email&utm_term=0_5f4ec2b124-2105cb79b2-179875093 <https://cosmosmagazine.com/earth-sciences/lava-and-meteorites-unveil-ancient-earths-atmosphere?utm_source=Today+in+Cosmos+Magazine&utm_campaign=2105cb79b2-RSS_EMAIL&utm_medium=email&utm_term=0_5f4ec2b124-2105cb79b2-179875093> Article based on following: Nature Geoscience | Letter published May 9, 2016 Earth's air pressure 2.7 billion years ago constrained to less than half of modern level http://www.nature.com/ngeo/journal/vaop/ncurrent/full/ngeo2713.html <http://www.nature.com/ngeo/journal/vaop/ncurrent/full/ngeo2713.html> Nature | Letter published May 11, 2016 Ancient micrometeorites suggestive of an oxygen-rich Archaean upper atmosphere http://www.nature.com/nature/journal/v533/n7602/full/nature17678.html <http://www.nature.com/nature/journal/v533/n7602/full/nature17678.html>
______________________________________________ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list [email protected] https://pairlist3.pair.net/mailman/listinfo/meteorite-list
