Geologists Discover World's Oldest Rocks

By Meera Dolasia on September 28, 2008

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Two geologists believe they have discovered what could be the world's oldest rocks near the Eastern shores of Hudson Bay in North Quebec. Jonathan O'Neil from McGill University and Richard Carlson from Carnegie Institution of Washington say that tests conducted on the rocks from this region indicate that they could be as old as 4.28 billion years old, only 300,000 years younger than the Earth.

The discovery is very significant because it may have remnants of the primordial crust - the first crust that formed on the planet's surface as it cooled, 4.6 billion years ago. It will provide geologists an invaluable insight into how the first crust was formed, something that remains a mystery even today. That's because though the Earth is 4.6 billion years old, most of the original bedrock (the rock layer right below the soil) has been crushed and recycled into the Earth's interior many times by the Plate Tectonics - the movement in the Earth's crust that led to the formation of the continents.

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Some further tests will confirm this discovery is indeed part of the original crust or recycled rocks with some element of the first crust in them. If confirmed, geologists will be able to compare the chemical composition of these rocks, with those from newer bedrocks and determine how it has changed over the years. Before this, the oldest known bedrock, also found in Canada, was 4.03 billion years old.


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  • DogeWednesday, February 8, 2017 at 10:58 am
    Wow much earth such crust amaze old
    • ??Wednesday, February 8, 2017 at 10:50 am
      that is cool but to my reaserch there is nothing but land water and air before the dinousaurs, and they were 65 milion years ago, the earth is 4.6 billion years old i wonder if there WAS anything before the dinos, because there was enough time for them to die
      • jazarahFriday, September 23, 2016 at 9:33 am
        why did the land move
        • A_girlFriday, September 23, 2016 at 9:28 am
          wow i like that and its intresting for 4th graders
          • objFriday, September 23, 2016 at 9:24 am
            • datacoman001
              datacoman001Monday, May 2, 2016 at 12:49 pm
              wow that is amazing
              • jaiSunday, September 6, 2015 at 5:52 pm
                that was cool
                • christianFriday, February 13, 2015 at 11:42 am
                  cool cool interesting solar system
                  • Alexis L.Thursday, March 6, 2014 at 12:34 pm
                    That makes me sad:-(
                    • MoneyThursday, March 6, 2014 at 12:26 pm
                      That is the kind of science I like.

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