This procedure is similar to the conventional optical microscopy with the picture showing the distribution of local magnetic fields. (sciencedaily.com)
It was the first time anyone had ever suggested that any animal could use local magnetic field patterns to traverse the ocean floor. (discovermagazine.com)
The connection between the magnetic signature and the date can be more accurate than radiocarbon because local magnetic fields often spike, generating unique signatures that last as little as 10 years. (discovermagazine.com)