Lithic period in Mesoamerica

In the history of Mesoamerica, the stage known as the Lithic stage (or alternatively, the Paleo-Indian period) is the era in the scheme of Mesoamerican chronology which begins with the very first indications of human habitation within the Mesoamerican region, and continues until the general onset of the development of agriculture and other proto-civilisation traits. The conclusion of this stage may be assigned to approximately 9000 BP (there are differences in opinion between sources which recognise the classification), and the transition to the succeeding Archaic period is not a well-defined one.

Source: Wikipedia — Lithic period in Mesoamerica (CC BY-SA 4.0)