Olmec heartland Olmec Metropolitan Zone. The major heartland sites are: Smaller sites include: Important heartland finds not associated with any archaeological site include: Olmec heartland The Olmec heartland is the southern portion of Mexico's Gulf Coast region between the Tuxtla mountains and the Olmec archaeological site of La Venta, extending roughly 80 km (50 mi) inland from the Gulf of Mexico coastline at its deepest. It is today, as it was during the height of the Olmec civilization, a tropical lowland forest environment, crossed by meandering rivers. Most researchers consider the Olmec heartland to be the home of the Olmec culture which
Mayan languages from that branch at a much later date than proposed by Kaufman. In the Archaic period (before 2000 BCE), a number of loanwords from Mixe–Zoquean languages seem to have entered the proto-Mayan language. This has led to hypotheses that the early Maya were dominated by speakers of Mixe–Zoquean languages, possibly the Olmec. In the case of the Xincan and Lencan languages, on the other hand, Mayan languages are more often the source than the receiver of loanwords. Mayan language specialists such as Campbell believe this suggests a period of intense contact between Maya and the Lencan and Xinca people, possibly