Earth:Lagarcito Formation

Lagarcito Formation Stratigraphic range: Albian
Type	Geological formation
Underlies	San Roque Formation
Overlies	La Cruz Formation
Lithology
Primary	Sandstone
Other	Mudstone
Location
Coordinates
Paleocoordinates	[ ⚑ ] 38.0°S 38.7°W / -38.0; -38.7
Region	San Luis Province
Country	Argentina
Extent	Marayes-El Carrizal Basin
Lagarcito Formation (Argentina)

The Lagarcito Formation is an Albian geologic formation in Argentina . Pterosaur fossils have been recovered from the formation. The formation overlies the La Cruz Formation and is overlain by the San Roque Formation. The sandstones and mudstones of the formation were deposited in a fluvial and mostly lacustrine environment. The fossil association and the geological evidence indicate that the Lagarcito Formation represents a perennial shallow lake situated in an alluvial plain where detrital sedimentation and semiarid climatic conditions predominated.

Fossil content

The following fossils have been found in the Lagarcito Formation:

• Neosemionotus puntanus
• Lepidotes pusillus
• Pterodaustro guinazui
• Treptichnus pollardi
• Cyzicus aff. codoensis
• Darwinula sp.
• Copytus sp.
• Bisulcocypris sp.
• Candonopsis sp.
• Anura indet.
• Magnoliophyta indet.
• Pleuropholidae indet.
• Trichoptera indet.

See also

• List of pterosaur-bearing stratigraphic units

References

Bibliography

• Gardini, Carlos; David Rivarola; Maximiliano Agüera, and Gerónimo Candela. 2009. Estructura de la región Sierra de Guayaguas-Marayes, Provincias de San Juan y San Luis. Revista de la Asociación Geológica Argentina 65. 551–565. Accessed 2018-09-08.

Further reading

• A. López-Arbarello and L. Codorniú. 2007. Semionotids (Neopterygii, Semionotiformes) from the Lower Cretaceous Lagarcito Formation, San Luis Province, Argentina. Journal of Vertebrate Paleontology 27(4):811-826