Thermoluminescence dating of ceramics
The statues are in fragments because the discoveries are usually made from alluvial mud, in terrain made by the erosion of water.
The terracotta figures are hollow, coil built, nearly life sized human heads and bodies that are depicted with highly stylized features, abundant jewellery, and varied postures.
Afterwards, Bernard and Angela Fagg ordered systematic excavations that revealed many more profitable lucky finds dispersed over a vast area, much larger than the original site.
In 1977, the number of terra cotta objects discovered in the course of the mining excavation amounted to 153 units, mostly from secondary deposits (the statuettes had been carted by floods near the valleys) situated in dried-up riverbeds in savannahs in Northern and Central Nigeria (the Southwestern portion of the Jos Plateau).
He brought it to the city of Jos and showed it to the trainee civil administrator, Bernard Fagg, an archaeologist who immediately understood its importance.
He asked all of the miners to inform him of all of their discoveries and was able to amass more than 150 pieces.