La Caja Formation Explained

La Caja Formation
Type:	Formation
Period:	Late Jurassic
Prilithology:	Marl
Otherlithology:	Limestone, Siltstone, Sandstone, Shale
Underlies:	Taraises Formation
Overlies:	Zuloaga Formation
Thickness:	Around 60 metres

The La Caja Formation is a geologic formation in Mexico. It preserves fossils dating from the Kimmeridgian to the lower Berriasian.^[1] La Caja Formation is widespread in northeastern and central Mexico and known for their abundant and diverse well-preserved ammonites. It was deposited in hemipelagic conditions, and predominantly consists of siliclastic sediments, including marl, with limestone.^[2] It is laterally equivalent to the La Casita Formation, which represent more proximal facies.^[3] The ichthyosaurs Ophthalmosaurus icenicus and Parrassaurus yacahuitztli, metriorhynchid Cricosaurus saltillensis, and the giant pliosaur "Monster of Aramberri" are known from the formation.^{[4] [5] [6] [7]}

See also

• List of fossiliferous stratigraphic units in Mexico

References

Notes

Sources

• Web site: Fossilworks: Gateway to the Paleobiology Database. ((Various Contributors to the Paleobiology Database)). 17 December 2021.

Notes and References

1. Zell, P., Stinnesbeck, W.. 2016. Salinites grossicostatum Imlay, 1939 and S. finicostatum sp. nov. from the latest Tithonian (Late Jurassic) of northeastern Mexico.. Boletín de la Sociedad Geológica Mexicana. 68. 2. 305–311. 10.18268/BSGM2016v68n2a8. free.
2. Zell,P., Stinnesbeck, W., Beckmann,S.. 2016. Late Jurassic aptychi from the La Caja Formation of northeastern Mexico.. Boletín de la Sociedad Geológica Mexicana. 68. 3. 515–536. 10.18268/BSGM2016v68n3a8. free.
3. Zell. Patrick. Beckmann. Seija. Stinnesbeck. Wolfgang. 2013-12-01. Late Jurassic-earliest Cretaceous belemnites (Cephalopoda: Coleoidea) from northeastern Mexico and their palaeobiogeographic implications. Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen. 270. 3. 325–341. 10.1127/0077-7749/2013/0374. 0077-7749.
4. Buchy. Marie-Céline. January 2010. First record of Ophthalmosaurus (Reptilia: Ichthyosauria) from the Tithonian (Upper Jurassic) of Mexico. Journal of Paleontology. 84. 1. 149–155. 10.1666/08-122.1. 130871980. 0022-3360.
5. Barrientos-Lara, J. I.; Alvarado-Ortega, J. (2021). "A new Tithonian ophthalmosaurid ichthyosaur from Coahuila in northeastern Mexico". Alcheringa: An Australasian Journal of Palaeontology. in press. doi:10.1080/03115518.2021.1922755.
6. Buchy. Marie-Céline. Vignaud. Patrick. Frey. Eberhard. Stinnesbeck. Wolfgang. González. Arturo H. González. September 2006. A new thalattosuchian crocodyliform from the Tithonian (Upper Jurassic) of northeastern Mexico. Comptes Rendus Palevol. 5. 6. 785–794. 10.1016/j.crpv.2006.03.003. 1631-0683.
7. Buchy. Marie-Céline. Frey. Eberhard. Stinnesbeck. Wolfgang. López-Oliva. José Guadalupe. 2003-05-01. First occurrence of a gigantic pliosaurid plesiosaur in the late Jurassic (Kimmeridgian) of Mexico. Bulletin de la Société Géologique de France. 174. 3. 271–278. 10.2113/174.3.271. 2042/260. 1777-5817. free.