I found this article interesting -
When the Earth's Magnetic Field Last Flipped Out
The Last Time the Earth's Magnetic Field Flipped
Started by
ski3pin
, Feb 19 2021 06:20 PM
6 replies to this topic
#1
ski3pin
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Posted 19 February 2021 - 06:20 PM
2003 Ford Ranger FX4 Level II 2013 ATC Bobcat SE "And in the end, it's not the years in your life that count. It's the life in your years."- Abraham Lincoln http://ski3pin.blogspot.com/
#2
Foy
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Posted 19 February 2021 - 08:19 PM
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
#3
ski3pin
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Posted 19 February 2021 - 08:32 PM
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!
2003 Ford Ranger FX4 Level II 2013 ATC Bobcat SE "And in the end, it's not the years in your life that count. It's the life in your years."- Abraham Lincoln http://ski3pin.blogspot.com/
#4
Casa Escarlata Robles Too
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Posted 19 February 2021 - 09:04 PM
Thanks Ski very interesting article.
Frank
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#5
AWG_Pics
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Posted 19 February 2021 - 10:11 PM
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.
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.
Edited by AWG_Pics, 19 February 2021 - 10:39 PM.
lived for several years each in Montana, Utah, Idaho, Texas, Washington, Oregon.
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#6
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Posted 20 February 2021 - 12:07 PM
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
#7
ntsqd
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Posted 23 February 2021 - 01:52 AM
In our short lived and probably myopic view, they don't.
Thom
Where does that road go?
Where does that road go?
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