Mexcala Formation

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

Mexcala Formation
Stratigraphic range: late Turonian-late Maastrichtian ~90–66 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Lithology
Primary	Limestone, sandstone
Other	Marl, shale
Location
Coordinates	18.0°N 99.2°W / 18.0; -99.2
Approximate paleocoordinates	20.5°N 71.4°W / 20.5; -71.4
Region	Guerrero state
Country	Mexico
Type section
Named for	Mexcala
Mexcala Formation (Mexico)

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^[4]
• 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]

Fish

• Buapichthys gracilis^[6]

See also

• List of fossiliferous stratigraphic units in Mexico
• List of dinosaur-bearing rock formations
  • List of stratigraphic units with ornithischian tracks
  • Ornithopod tracks
• Mesozoic Mexico-related topics