Olmec heartland 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 became widespread over Mesoamerica from 1400 BCE until roughly 400 BCE. The area is also referred to as Olman or the
Mayan languages only past and non-past, while Mam has only future and non-future. Aspect systems are normally more prominent. Mood does not normally form a separate system in Mayan, but is instead intertwined with the tense/aspect system. Kaufman has reconstructed a tense/aspect/mood system for proto-Mayan that includes seven aspects: incompletive, progressive, completive/punctual, imperative, potential/future, optative, and perfective. Mayan languages tend to have a rich set of grammatical voices. Proto-Mayan had at least one passive construction as well as an antipassive rule for downplaying the importance of the agent in relation to the patient. Modern K'iche' has two antipassives: one which ascribes focus