Mexcala Formation
Introduction The '''Mexcala Formation''' is a Late Cretaceous (late Turonian to late Maastrichtian) geologic formation in Guerrero state, southern Mexico.
Fossil content Fossil ornithopod tracks assigned to Hadrosauridae indet. and sauropod tracks have been reported from the formation.Other fossils from the formation include:=== Ammonites ===* ''Barroisiceras (Texanites) dentatocarinatum''* ''Coilopoceras colleti''* ''C. requienianum''* ''Forresteria (Forresteria) alluaudi''* ''Peroniceras aff. tricarinatum''* ''P. cf. subtricarinatum''* ''Pseudotissotia galliennei''* ''Barroisiceras cf. alstadenense''* ''Barroisiceras sp. ''* ''Peroniceras sp.''
See also * List of fossiliferous stratigraphic units in Mexico* List of dinosaur-bearing rock formations** List of stratigraphic units with ornithischian tracks** Ornithopod tracks*
References === Bibliography ===* A. A. Ramírez Velasco, R. Hernández Rivera, and R. Servin Pichardo. 2014.The hadrosaurian record from Mexico. In D. A. Eberth & D. C. Evans (ed. ), Hadrosaurs 340-360*  * S. Kiel and M. d. C. Perrilliat. 2001.New gastropods from the Maastrichtian of the Mexcala Formation in Guerrero, southern Mexico, part 1: Stromboidea. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen 222(3):407-426* E. Cabral Cano, H. R. Lang, and C. G. A. Harrison. 2000.Stratigraphic Assessment of the Arcelia-Teloloapan area, Southern Mexico: Implications for Southern Mexico's Post-Neocomian Tectonic Evolution. Journal of South American Earth Science 13:443-457* M. C. Perrilliat, F.J. Vega, and R. Corona. 2000.Early Maastrictian mollusca from the Mexcala formation of the state of Guerro, southern Mexico. Journal of Paleontology 74(1):7-24* I. Ferrusquia Villafranca, E. Jimenes Hidalgo, and V. M. Bravo Cuevas. 1995.Jurassic and Cretaceous dinosaur footprints from Mexico: additions and revisions. Journal of Vertebrate Paleontology 15(3, suppl. ):28A* C. González Arreola. 1977.Amonitas del Coniaciano (Cretacico superior) de la region de Tepetlapa, estado de Guerrero Coniacian (Upper Cretaceous) ammonoids from the Tepetlapa region (Guerrero). Revista Universidad Nacional Autonoma de Mexico, Instituto de Geologia 1(2):167-173