There is a book written by a guy in my town called “Canopy of Ice”. It chronicles the very thing you are discussing here, along with the possibility of a layer of ice around the earth in pre biblical times and collapsed over time, causing much of the ice in the polar areas, the great flood, and a bunch of other things that scientists want to ignore. Things like the absence of any pictures of mentions of the sun in biblical scripture, or in hyrogliphics and cave drawings, the absence of any mention of rain, and other ancient omissions until a certain place in time. It’s a very good book, written in 3rd party fiction to keep the reader interested. It all starts with the discovery of a family that had 3 of their 6 children locked away, due to a child restriction law in their area. The Dickenson children, and chronicles how even at the ages of 17,13, and 9, they looked to be 8,6 and 4. The effects of ultraviolet light and how it effects aging, and the way a canopy of ice would’ve shielded to people in biblical times, causing their lifespan to be 120 years or more. Very interesting book, if you can find it.
In it they discuss the flipping of the magnetic field and when that happened, causing the ice canopy to partially collapse, as the earth does not spin in a completely perfect elliptical way.