On this day March 21, 650,000,000 years ago

sc650ma

  After literally combing through dozens of sources to attempt to write the history of the earth, I have decided that  I need to go back even further in time to explain things better.  This is sort of like George Lucas’s decision to release the   prequels to Star Wars after the first 3 movies.  But, good enough for Lucas, good enough for me. Anyhow, I digress…

Time scale should be addressed here so we can sit dumb founded at the grandeur of the events that have transpired on this beautiful blue dot.  85% of earth’s history  took place in what scientists call the Precambrian.  This is usually measured in Billions of years, not Millions! The Precambrian   began at the beginning of Earth’s birth and ended 570 mya and is simply divided into 3 Eons of immense time scale in and of themselves.  After the Precambrian, geologists start to divide  Eons into                   Eras, Periods and Epochs.

So, if we time warp back 650 mya to a time even before Pangea, Laurentia existed.  Remember, it is the core of our North American continent.  It was far below the equator, almost to the south pole then and probably served as the core of another super continent known as Rodinia. This was a time of another global ice age  indicated by evidence from glacial deposits from the Late Proterozoic Eon, 1.1 billion years ago.  The seas and land were empty and our world was a lonely, lonely place. However, big things were brewing and fermenting  to usher in a new Eon, the Phanerozoic Eon, the eon we still live in today.

The eon where life was born.

Untold thanks to the US Geological Survey:

http://geomaps.wr.usgs.gov/parks/pltec/sc650ma.html#reconstruct

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