It is also a newly defined unit that includes the southern part of the area previously designated the Datil Section.
[2] The Datil-Mogollon Section is located along the southeastern rim of the Colorado Plateau, in New Mexico and eastern Arizona.
High tablelands are capped with tuffs, andesite, and basalt lavas, and volcanic-derived conglomeratic sandstones and mudstones.
The principal structure of the southeastern Datil-Mogollon area is a large central-type volcano, Mount Taylor, that rises to 11,389 ft (3,471 m).
[2] Along the eastern edge of the Datil-Mogollon, the Mexican Highland extends northward along the Rio Grande depression to the Southern Rocky Mountains.