The Mexcala Formation is a Late Cretaceous (late Turonian to late Maastrichtian) geologic formation in Guerrero state, southern Mexico.Mexcala Formation at Fossilworks.orgBioOne Online Journals: "Early MAASTRICHTIAN MOLLUSCA from the MEXCALA FORMATION of the State of GUERRERO, Southern MEXICO"
Fossil content Fossil ornithopod tracks assigned to Hadrosauridae indet. and sauropod tracks have been reported from the formation.Weishampel et al., 2004, "Dinosaur distribution", pp.517-607
Other fossils from the formation include:
Ammonites
Barroisiceras (Texanites) dentatocarinatum Coilopoceras colletiGonzález Arreola, 1977 C. requienianum Forresteria (Forresteria) alluaudi Peroniceras aff. tricarinatumCabral Cano et al., 2000 P. cf. subtricarinatum Pseudotissotia galliennei Barroisiceras cf. alstadenense Barroisiceras sp. Peroniceras sp.
Fish
Buapichthys gracilis
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