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Ancient Tree With Record of Earth's Magnetic Field Reversal in Its Rings Discovered
Newsweak ^ | Thursday, July 4, 2019 | Hannah Osborne

Posted on 07/15/2019 9:21:19 AM PDT by SunkenCiv

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The kauri tree unearthed during the expansion of the Ngawha Generation geothermal power plant. Nelson Parker

The kauri tree unearthed during the expansion of the Ngawha Generation geothermal power plant. Nelson Parker

1 posted on 07/15/2019 9:21:19 AM PDT by SunkenCiv
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Nuts! Here's that text with the typos corrected.
An ancient tree that contains a record of a reversal of Earth's magnetic field has been discovered in New Zealand. The tree -- an Agathis australis, better known as its MÇori name kauri -- was found in Ngawha, on New Zealand's North Island, during excavation work for the expansion of a geothermal power plant, stuff.nz reports.

The tree, which had been buried in 26 feet of soil, measures eight feet in diameter and 65 feet in length. Carbon dating revealed it lived for 1,500 years, between 41,000 and 42,500 years ago...

The lifespan of the kauri tree covers a point in Earth's history when the magnetic field almost reversed. At this time, the magnetic north and south went on an excursion but did not quite complete a full reversal.

Earth's magnetic field is thought to be generated by the iron in the planet's core. As it moves around, it produces electric currents that extend far into space. The magnetic field acts as a barrier, protecting Earth from the solar wind. This is a stream of charged particles from the Sun that could strip away the ozone layer if it were to impact the atmosphere.

When the magnetic field reverses -- or attempts to -- it gets weaker, leading to more radiation from the Sun getting through. Previously, scientists have linked extinction events to magnetic field reversals.

The newly discovered kauri tree's rings contain a complete record of a near-reversal -- the first time a tree that lived during the entire event has ever been found. "It's the time it takes for this movement to occur that is the critical thing...We will map these changes much more accurately using the tree rings," Hogg told stuff.nz.

2 posted on 07/15/2019 9:23:11 AM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: 75thOVI; Abathar; agrace; aimhigh; Alice in Wonderland; AnalogReigns; AndrewC; aragorn; ...

3 posted on 07/15/2019 9:23:40 AM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: StayAt HomeMother; Ernest_at_the_Beach; 1ofmanyfree; 21twelve; 24Karet; 2ndDivisionVet; 31R1O; ...
Okay, so, I live to take risks and live my online life on the edge.

4 posted on 07/15/2019 9:23:48 AM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: SunkenCiv

Don’t ever base a theory on just one tree.


5 posted on 07/15/2019 9:26:30 AM PDT by I want the USA back (The further a society drifts from the truth, the more it will hate those who speak it. Orwell.)
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To: SunkenCiv

Is there a truncated version?


6 posted on 07/15/2019 9:32:00 AM PDT by golux
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To: I want the USA back

There is evidence of many pole reversals on the bottom of the Atlantic Ocean. When looking at the Iron on the sea floor, it is aligned in different directions—North and South. If you were to color one direction white and the other black, the pattern would look like a zebra.

It is a fairly regular event and nothing to really get worked up about.


7 posted on 07/15/2019 9:33:35 AM PDT by Vermont Lt (If we get Medicare for all, will we have to show IDs for service?)
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To: SunkenCiv

How do the changes in the rings reflect changes in the magnetic fields?


8 posted on 07/15/2019 9:54:02 AM PDT by Silentgypsy (Call an addiction hotline and say you're hooked on phonics.)
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To: golux
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(I'm just brimming over with envy for not having thought of that)

9 posted on 07/15/2019 9:55:12 AM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: golux

I see what you did there.


10 posted on 07/15/2019 9:55:18 AM PDT by 1FreeAmerican
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To: Vermont Lt

Maybe I should have asked you about post #8.


11 posted on 07/15/2019 9:56:18 AM PDT by Silentgypsy (Call an addiction hotline and say you're hooked on phonics.)
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To: Silentgypsy
Iron in the cells is lined up on the then-current magnetic field lines.

12 posted on 07/15/2019 9:56:23 AM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: I want the USA back
When it fell, did anyone hear it?


13 posted on 07/15/2019 9:57:08 AM PDT by Daffynition (*I'm living the dream.* & :))
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To: SunkenCiv
First, the title is very misleading.

They inferred a "NEAR reversal" NOT "Magnetic Field Reversal"!!!!

Second, Nobody explains the uniqueness of finding a 40,000 year old tree that HAS NOT BEEN PETRIFIED!!!!!!

Third, they don't explain how the tree rings revealed changes in the Earth's magnetic field.

14 posted on 07/15/2019 9:59:35 AM PDT by G Larry (There is no great virtue in bargaining with the Devil)
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15 posted on 07/15/2019 9:59:59 AM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: SunkenCiv
Ancient Tree With Record of Earth's Magnetic Field Reversal in Its Rings Discovered,

All we have to do is just rename NORTH and SOUTH...............and teach migratory birds to fly backwards...........

16 posted on 07/15/2019 10:00:14 AM PDT by Red Badger (We are headed for a Civil War. It won't be nice like the last one....................)
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To: G Larry
Almost reversed, because all the magnetic pole shifts have been random amounts. The magnetic pole used to run through Arabia, for example. IOW, the headline isn't misleading at all.
Petrification takes some length of time, or is a sudden process related to short-lived events (the latter would be suggested if this turns out to be an entire forest's worth of trees).

17 posted on 07/15/2019 10:04:00 AM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: Vermont Lt
The journal Frontiers in Zoology study, points out that **Dogs poop in alignment with Earth’s magnetic field**.

https://www.pbs.org/newshour/science/dogs-poop-in-alignment-with-earths-magnetic-field-study-finds


18 posted on 07/15/2019 10:06:39 AM PDT by Daffynition (*I'm living the dream.* & :))
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To: golux

Just several versions that sort of branch off.


19 posted on 07/15/2019 10:07:23 AM PDT by VietVet876
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To: Red Badger
Everybody knows it's about the birds....

20 posted on 07/15/2019 10:09:33 AM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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