You might be surprised what you can learn from a campfire. A campfire that has been cold for, say, 300 years.
Stacey Lengyel hopes she can tell, within 30 years or so, when it was used.
Lengyel, a research associate in anthropology at the Illinois State Museum, is the country's leading authority on archeomagnetic dating, a process built around two phenomena: when heated, magnetic particles reorient themselves to magnetic north; and over time, magnetic north is, literally, all over the map.
Monday, June 30, 2008
Magnetic fields used to date Indian artifacts