 The formation is exposed throughout the Chama basin, the Nacimiento, and Jemez Mountains of New Mexico.It divides the lower and upper Chinle Group where present, but rapidly pinches out to the south, where the underlying Salitral Formation becomes indistinguishable from the overlying Petrified Forest Formation.The Poleo Formation is at the same stratigraphic position as the Trujillo Formation of West Texas and eastern New Mexico, the Sonsela Member of the Petrified Forest Formation in west-central New Mexico and northeastern Arizona, and the Moss Back Formation of southern Utah and southwestern Colorado.