Mexcala Formation Explained

Mexcala Formation
Type:	Geological formation
Age:	late Turonian-late Maastrichtian ~
Period:	Late Cretaceous
Prilithology:	Limestone, sandstone
Otherlithology:	Marl, shale
Namedfor:	Mexcala
Region:	Guerrero state
Coordinates:	18°N -99.2°W
Paleocoordinates:	20.5°N -71.4°W

The Mexcala Formation is a Late Cretaceous (late Turonian to late Maastrichtian) geologic formation in Guerrero state, southern Mexico.^{[1] [2]}

Fossil content

Fossil ornithopod tracks assigned to Hadrosauridae indet. and sauropod tracks have been reported from the formation.^[3]

Other fossils from the formation include:^[1]

Ammonites

• Barroisiceras (Texanites) dentatocarinatum
• Coilopoceras colleti^[4]
• C. requienianum^[4]
• Forresteria (Forresteria) alluaudi^[4]
• Peroniceras aff. tricarinatum^[5]
• P. cf. subtricarinatum^[5]
• Pseudotissotia galliennei^[4]
• Barroisiceras cf. alstadenense^[5]
• Barroisiceras sp.^[5]
• Peroniceras sp.^[5]

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

Notes and References

1. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Mexcala&group_formation_member=Mexcala Mexcala Formation
2. http://www.bioone.org/doi/abs/10.1666/0022-3360%282000%29074%3C0007%3AEMMFTM%3E2.0.CO%3B2?journalCode=pleo BioOne Online Journals: "Early MAASTRICHTIAN MOLLUSCA from the MEXCALA FORMATION of the State of GUERRERO, Southern MEXICO"
3. Weishampel et al., 2004, "Dinosaur distribution", pp.517-607
4. González Arreola, 1977
5. Cabral Cano et al., 2000