This chronological framework is based on the latest published summary of the Lower Pecos archeological region by Solveig A. Turpin. It is a graphical representation of the major divisions of prehistory that is intended to help improve communication and spur further refinement. Adapted from Turpin, 2004, The Lower Pecos River Region of Texas and Northern Mexico, in The Prehistory of Texas, edited by Timothy K. Perttula, Texas A&M University Press.