Article · Wikipedia archive · Last revised Jun 28, 2026

Lomas Coloradas Formation

The Lomas Coloradas Formation is a Mesozoic geologic formation in Mexico. Dinosaur remains are among the fossils that have been recovered from the formation, although only a few have yet been referred to a specific genus. Indeterminate hadrosaur remains, indeterminate ceratopsian remains, indeterminate tyrannosaur remains, indeterminate maniraptoriform remains, and indeterminate sauropod remains, most likely belonging to Alamosaurus, have been unearthed here.

Last revised
Jun 28, 2026
Read time
≈ 2 min
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Citations
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Source
Lomas Coloradas Formation
Stratigraphic range: Maastrichtian
TypeGeological formation
Location
CountryMexico

The Lomas Coloradas Formation is a Mesozoic geologic formation in Mexico.1234 Dinosaur remains are among the fossils that have been recovered from the formation, although only a few have yet been referred to a specific genus.5 Indeterminate hadrosaur remains,6 indeterminate ceratopsian remains,7 indeterminate tyrannosaur remains,8 indeterminate maniraptoriform remains,9 and indeterminate sauropod remains, most likely belonging to Alamosaurus, have been unearthed here.10

Dinosaurs

Dinosaurs reported from the Lomas Coloradas Formation
Genus Species Location Stratigraphic Position Material Notes Images

Tyrannosaurus?11

T. rex?

A tyrannosaurid. Also from the Hell Creek, Denver, Ferris, Frenchman, Javelina, Livingston, McRae, North Horn, Scollard, and Willow Creek Formations.

See also

See also

Footnotes

Footnotes

  1. González-León, Carlos Manuel (1994). "Stratigraphy, depositional environments, and origin of the Cabullona Basin, northeastern Sonora, Mexico". {{cite journal}}: Cite journal requires |journal= (help)
  2. Lucas, Spencer G.; Kues, Barry S.; Gonzalez-Leon, Carlos M. (1995), "Paleontology of the Upper Cretaceous Cabullona Group, northeastern Sonora", Special Paper 301: Studies on the Mesozoic of Sonora and adjacent areas, Geological Society of America, pp. 143–165, ISBN 0-8137-2301-9, retrieved 2025-03-17
  3. Ríos-Santos, César; Cevallos-Ferriz, Sergio R. S.; Pujana, Roberto R. (2020-12-01). "Cupressaceous woods in the Upper Cretaceous Cabullona Group in Fronteras, Sonora, Mexico". Journal of South American Earth Sciences. 104 102756. doi:10.1016/j.jsames.2020.102756. ISSN 0895-9811.
  4. Taliaferro, N. L. (1933). "An Occurrence of Upper Cretaceous Sediments in Northern Sonora, Mexico". The Journal of Geology. 41 (1): 12–37. ISSN 0022-1376.
  5. Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
  6. Velasco, Angel Alejandro Ramírez; Rivera, Rene Hernandez; Servín-Pichardo, Ricardo (January 2014). Eberth, David A.; Evans, David C. (eds.). The Hadrosaurian Record from Mexico. 1320 E 10th St, Bloomington, IN 47405: Indiana University Press. pp. 340–360. ISBN 978-0-253-01390-3. Retrieved 16 November 2020.{{cite book}}: CS1 maint: location (link)
  7. Rivera-Sylva, Héctor E.; Frey, Eberhard; Stinnesbeck, Wolfgang; Guzmán-Gutiérrez, José Rubén; González-González, Arturo H. (2017-04-01). "Mexican ceratopsids: Considerations on their diversity and biogeography". Journal of South American Earth Sciences. 75: 66–73. doi:10.1016/j.jsames.2017.01.008. ISSN 0895-9811.
  8. Serrano-Brañas, Claudia Inés; Torres-Rodríguez, Esperanza; Reyes Luna, Paola Carolina; González, Ixchel; González-León, Carlos (May 2014). "Tyrannosaurid teeth from the Lomas Coloradas Formation, Cabullona Group (Upper Cretaceous) Sonora, México". Cretaceous Research. 49: 163–171. doi:10.1016/j.cretres.2014.02.018. ISSN 0195-6671.
  9. Carbot Chanona, Gerardo; Rivera Sylva, Héctor E. (2011). "Presence of a maniraptoriform dinosaur in the Late Cretaceous (Maastrichtian) of Chiapas, southern Mexico". Boletín de la Sociedad Geológica Mexicana. 63 (3): 393–398. doi:10.18268/bsgm2011v63n3a2. ISSN 1405-3322.
  10. Osmólska, Halszka (6 November 2004). Weishampel, David B.; Osmolska, Halszka; Dodson, Peter (eds.). The Dinosauria. University of California Press. p. 823. ISBN 978-0-520-24209-8. Retrieved 16 November 2020.
  11. "Tyrannosauroidea".
References

References

  • Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. ISBN 0-520-24209-2.