Cretaceous stratigraphy and biostratigraphy, western Franklin Mountains, El Paso, Texas
— Spencer G. Lucas, Leroy L. Corbitt, and John W. Estep

Cretaceous strata crop out at four principal localities along the western fault zone of the Franklin Mountains. Detailed lithostratigraphy and biostratigraphy indicates the presence of relatively thin sections of the Muleros, Mesilla Valley, Anapra, Del Rio, Buda, and Boquillas Formations. One location preserves an apparent depositional contact of the Muleros Formation on Paleozoic limestone. These observations suggest the presence of an emergent depositional high—the Franklin Mountains Island—in west Texas during part of the late Albian.