The development of the theory of Continental Drift
https://pubs.usgs.gov/gip/dynamic/developing.html
Earths Magnetic Field – is it flipping?
https://www.space.com/43173-earth-magnetic-field-flips-when.html?utm_source=sdc-newsletter&utm_medium=email&utm_campaign=20190131-sdc
This information establishes the way in which the earths crust has changed over time, and is very similar to reading the rings on a tree and dating its age.
Seafloor next to the Pacific Northwest
https://pubs.usgs.gov/gip/dynamic/magnetic.html
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