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But an argument against an Olmec origin is the fact that the Olmec civilization had ended by the 4th century BCE, several centuries before the earliest known Long Count date artifact. [ 76 ] The Long Count calendar required the use of zero as a place-holder within its vigesimal (base-20) positional numeral system.
Although there is no incontrovertible evidence of child sacrifice in the Olmec civilization, full skeletons of newborn or unborn infants, as well as dismembered femurs and skulls, have been found at the El Manatí sacrificial bog. These bones are associated with sacrificial offerings, particularly wooden busts.
Chronologically, the history of the Olmecs can be divided into the Early Formative (1800-900 BCE), Middle Formative (900-400 BCE) and Late Formative (400 BCE-200AD). The Olmecs are known as the "mother culture" of Mesoamerica, meaning that the Olmec civilization was the first culture that spread and influenced Mesoamerica.
"Olmec-style" face mask in jade. The Olmec civilization developed in the lowlands of southeastern Mexico between 1500 and 400 BC. [3] The Olmec heartland lies on the Gulf Coast of Mexico within the states of Veracruz and Tabasco, an area measuring approximately 275 kilometres (171 mi) east to west and extending about 100 kilometres (62 mi) inland from the coast. [4]
The Olmecs are sometimes referred to as the mother culture of Mesoamerica, as they were the first Mesoamerican civilization and laid many of the foundations for the civilizations that followed. [178] However, the causes and degree of Olmec influences on Mesoamerican cultures has been a subject of debate over many decades. [ 179 ]
San Andrés is notable for the ancient pollen and seeds recovered there. Although the humid rainy tropical lowlands have made quick work of organic substances, including Olmec skeletal remains, the multi-disciplinary research team delved below the water table, hoping that the preservative nature of water-logged soil would enable them to retrieve ancient samples.
The first Mesoamerican civilization, the Olmecs, developed on present-day Mexico southern Gulf Coast in the centuries before 1200 BCE. The culture lasted until roughly 400 BCE, at which time their center of La Venta lay abandoned. The Olmec culture is often considered a "mother culture" to later Mesoamerican cultures.
San Lorenzo and the Olmec heartland.. Matthew Stirling was the first to begin excavations on the site after a visit in 1938. [12] Between 1946 and 1970, four archaeological projects were undertaken, including one Yale University study headed by Michael Coe and Richard Diehl conducted between 1966 and 1968, followed by a lull until 1990.