Barite is a mineral newly found to be practically useful for electron spin resonance (ESR) dating of sulphide deposits formed by the sea-floor hydrothermal activities.
You and Bickle ) for the range less than 150 years.
Although with clever detective work many complex time sequences or relative ages can be deduced, the ability to show that objects at two separated sites were formed at the same time requires additional information.
A coin, vessel, or other common artifact could link two archaeological sites, but the possibility of recycling would have to be considered.
The age range of several hundred years is essential to estimate the life time of hydrothermal activities.
However, dating methods for the age range are lacking. () confirmed that the signal is thermally stable enough for an age range of several thousand years.