TORONTO — New analyses of bricks and mortar from French buildings constructed during the 9th and 10th centuries are providing information about Earth’s magnetic field at the time, Annick Chauvin, a geophysicist at the University of Rennes 1 in France, and her colleagues reported May 25 at a meeting of the American Geophysical Union.
The researchers analyzed samples of materials used in the construction of a medieval castle and several churches in west-central France to better determine when they were built. Ages for the structures were obtained by carbon-dating bits of charcoal included in the mortar used to hold bricks together.
Note: To comment, Science News subscribing members must now establish a separate login relationship with Disqus. Click the Disqus icon below, enter your e-mail and click “forgot password” to reset your password. You may also log into Disqus using Facebook, Twitter or Google.