For nearly 2000 years, beginning around 3500 BC, the ancient Ecuadorian cultures (called the Valdivian Phase) carved figurines out of stone (particularly limestone). It is believed these ancient artifacts were used for rituals performed by tribal shaman. The shaman may have used the figures as "vessels" for his own spirit, entering them so he could be close to the person in need. They could have been used for healing, fertility, or other reasons.
Once limestone is exposed to air, as in carving, it reacts at a predictable rate with other minerals. Measuring the amount of these minerals gives us a very close approximation of their age. It is also non-destructive, unlike carbon dating. |