The Last Time the Earth's Magnetic Field Flipped

[ski3pin]

I found this article interesting -

When the Earth's Magnetic Field Last Flipped Out

 

[Foy]

Absolutely fascinating. Who knew there were fluorocarbons, Chevy Suburbans, and V-10 F-250s 42,000 years ago?

Seriously, magnetic flips were taught in undergraduate geology programs even back in the Pleistocene when I graduated from Appalachian State. Between mag flips and entire continents surfing the mantle all over the globe, paleogeography is a pretty challenging niche.

Foy

 

[ski3pin]

Years ago I watched a NOVA program called Magnetic Storm. It included basalt layers in Steens Mountain Oregon that showed crystal alignments that indicated flip flopping of the magnetic poles. It also stated pole flip occurred on average every 300,000 years and that we were overdue. In this article it states we had a short lived pole reversal 42,000 years ago. That's what caught my eye along with the theory that increased UV drove man into caves. Fascinating stuff, indeed!

 

[Casa Escarlata Robles Too]

Thanks Ski very interesting article.
Frank

 

[AWG_Pics]

There have been many such reversals over the last couple hundred million years.
Given that 12000 years ago there were lakes all over the Great basin and many of the ranges were just islands, it is surprising how most people think that things don't really change all that much.

 

[Foy]

Given that 12000 years ago there were lakes all over the Great basin and many of the ranges were just islands, it is surprising how most people think that things don't really change all that much.

Amen to that, geo-brother.

Foy

 

[ntsqd]

In our short lived and probably myopic view, they don't.