Old stone walls record history of Earth’s magnetic wanderings

From AGU 27 February 2019  Posted by llester By Liza Lester https://youtu.be/G3OTG3_ih3c Under the forests of New York and New England, a hidden tracery of tumbledown stone walls marks the boundaries of early American farms, long abandoned for city jobs and less stony pastures in the West. These monuments of an agrarian past also mark…

from Climate Change Skeptic Blogs via hj on Inoreader https://ift.tt/2IHOLM9