Home > Age of the Earth, Ephemeris Program > 03/14/2014 – Ephemeris – Oldest (so far) earthly rock found

03/14/2014 – Ephemeris – Oldest (so far) earthly rock found

March 14, 2014

Ephemeris for Pi Day 3/14, Friday, March 14th.  The sun will rise at 7:56.  It’ll be up for 11 hours and 50 minutes, setting at 7:47.   The moon, 2 days before full, will set at 7:08 tomorrow morning.

Scientists have found the oldest earth rock, actually a tiny zircon from Jack Hills in western Australia.  The earth, with plate tectonics, and weathering is pretty hard on rocks, so it’s impossible to date the age of the Earth from them.  The age of the solar system, and presumably the Earth is measured from meteorites which have been pretty much unaltered since the beginning.  Dating meteorites gives us a pretty consistent 4.567 billion years as the oldest age.  One spot in the zircon measures to date of 4.374 billion years ago.   If the date holds up, it means the molten earth formed a solid surface very early, maybe 160 million years after its formation and 100 million years after a Mars sized object slammed into the Earth creating the Moon.

Times are for the Traverse City/Interlochen area of Michigan.  They may be different for your location.

Addendum

Link to LiveScience Article for more information.

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  1. March 14, 2014 at 7:32 am
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