 For example, Monument 1 at Río Chiquito and Monument 3 at Potrero Nuevo were, according to Stirling, the mythological union of a jaguar and a woman that produced "almost jaguar children".It would be nearly 15 years before radiocarbon dating finally confirmed that the Olmec pre-dated the Maya.The Olmec culture is generally considered to have lasted from 1400 BCE until 400 BCE.