Mexico is made up of a mosaic of several terranes, and a lot has been discussed about their origin and evolution. Originally, most of the terranes were defined on the basis of differences of Jurassic-Cretaceous stratigraphy, due to the scarcity of pre-Jurassic exposures. Many of the building units of all these terranes are not well exposed, and most of the contacts therefore are inferred. Diverse models have been proposed for the terrane configuration and tectonic evolution of Mexico, first by Campa and Coney (1983) and then Coney and Campa (1987), Sedlock et al. (1993), Ortega et al. (1995), Dickinson y Lawton (2001), Keppie (2004), Centeno-García (2005), among others.
More recent work by diverse authors in areas like pre-Jurassic stratigraphy, depositional environments, paleogeography, structural geology, and provenance of sedimentary rocks are helping to better constrain the terrane configuration and the tectonic evolution of Mexico, resulting in new models (Ortega-Gutierrez et al., 1995; Centeno-García, 2005; Centeno-García et al., 2008; Barboza-Gudiño et al., 2008, Tristán-González, 2008, among others).

The debate still goes on, and future work will undoubtedly add to the  models of today. In the next figures are some of the models that have been generated:

Campa and Coney, 1983

Sedlock et al, 1993

Keppie, 2004

Centeno et al, 2008