The data suggest that phosphate concentrations have been relatively constant over the Phanerozoic eon, the past 542 million years (Myr) of Earth’s history. In contrast, phosphate concentrations seem to have been elevated in Precambrian oceans. Specifically, there is a peak in phosphorus-to-iron ratios in Neoproterozoic iron formations dating from ~750 to ~635Myr ago, indicating unusually high dissolved phosphate concentrations in the aftermath of widespread, low-latitude ‘snowball Earth’ glaciations. shaybo-therisingtide.blogspot/2011/09/evolution-of-marine-phosphate-reservoir.html..
Posted on: Sat, 08 Mar 2014 07:01:46 +0000
Trending Topics
Recently Viewed Topics
© 2015