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magnetic painting

04.03.2005

A group of Mexican geophysicists led by Avto Gogichaishvili has found a new method for dating rock art.

Since the red paint with which the Indians of pre-Columbian America painted their frescoes on the walls of caves contains particles of magnetic minerals - hematite and magnetite, these drawings record the direction of the magnetic field at the time when the frescoes were applied to the stone.

Since the record of changes in the magnetic field is also preserved in the surrounding rocks, it is possible to determine from the magnetism of the drawings when they were made. The age of the studied frescoes is from eight hundred to a thousand years.

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