1 commento

  • Anahi - Martedì 26 Giugno 2012 11:15
    How does one correlate dnhacroious glacial strata?That's a bit beyond the scope of this post, don't you think? And you should note that I was quite conservative in my description. There are lots of apparently glacial deposits around the world which roughly fall into the period between 750 and 635 million years. The oldest one in this region has a maximum age of 750 million (from dating of a granite cobble within it, if I recall correctly).The late Neoproterozoic wall clearly a time where the world was quite glaciated. Whether you can correlate everything into two global events is another question entirely. And what might be the survival of recognisable eukaryotic groups though this period is not what you might expect if there was a total deep freeze.
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