However , this date could have been the result of contamination from other elements in the soil , so currently there is an effort to date verified lithics through thermoluminesence dating .
A stone from the Master Pit had been dated to over 200,000 BP .
This date could have been the result of contamination from other elements in the soil , so currently there is an effort to date verified lithics through thermoluminesence dating .
A stone from the Master Pit had been dated to over 200,000 BP .