MyJournals Home  

RSS FeedsRapid sea level rise in the aftermath of a Neoproterozoic snowball Earth (Science)


11 may 2018 00:00:50

Rapid sea level rise in the aftermath of a Neoproterozoic snowball Earth (Science)

Earth`s most severe climate changes occurred during global-scale `snowball Earth` glaciations, which profoundly altered the planet`s atmosphere, oceans, and biosphere. Extreme rates of glacioeustatic sea level rise are predicted by the snowball Earth hypothesis, but supporting geologic evidence has been lacking. We use paleohydraulic analysis of wave ripples and tidal laminae in the Elatina Formation, Australia—deposited after the Marinoan glaciation ~635 million years ago—to show that water depths of 9 to 16 meters remained nearly constant for ~100 years throughout 27 meters of sediment accumulation. This accumulation rate was too great to have been accommodated by subsidence and instead indicates an extraordinarily rapid rate of sea level rise (0.2 to 0.27 meters per year). Our results substantiate a fundamental prediction of snowball Earth models of rapid deglaciation during the early transition to a supergreenhouse climate. Digg Facebook Google StumbleUpon Twitter
36 viewsCategory: General, Biology, Chemistry
The histone demethylase KDM6B regulates temperature-dependent sex determination in a turtle species (Science)
Efficient coding explains the universal law of generalization in human perception (Science)
blog comments powered by Disqus
The latest issues of all your favorite science journals on one page


Register | Retrieve



Use these buttons to bookmark us: Digg Facebook Google StumbleUpon Twitter

Valid HTML 4.01 Transitional
Copyright © 2008 - 2019 Indigonet Services B.V.. Contact: Tim Hulsen. Read here our privacy notice.
Other websites of Indigonet Services B.V.: Nieuws Vacatures News Tweets Travel Photos Nachrichten Indigonet Finances Leer Mandarijn