Colorado Formation, Argentina

The Colorado Formation is a Late Cretaceous (Campanian to Maastrichtian geologic formation that is exposed within the Colorado Basin in the southeastern part of La Pampa Province, Argentina. Fossil dinosaur eggs of Sphaerovum erbeni have been reported from the nonmarine, fluvial strata of this formation.[1][2]

Colorado Formation Stratigraphic range: Campanian-Maastrichtian
Type	Geological formation
Overlies	Paleozoic basement
Thickness	30 m (98 ft)
Lithology
Primary	Sandstone
Other	Conglomerate
Location
Coordinates	38.2°S 64.5°W
Approximate paleocoordinates	41.3°S 49.8°W
Region	La Pampa Province
Country	Argentina
Extent	Colorado Basin
Type section
Named for	Colorado River
Colorado Formation, Argentina (Argentina)

Description

The formation overlies the Paleozoic basement and has an estimated thickness of 30 metres (98 ft).[3] The Colorado Formation comprises medium-grained sandstones with intercalated conglomerates with pebbly beds that can be interpreted as fluvial to alluvial deposits.[3][4]

See also

• List of dinosaur-bearing rock formations
• List of stratigraphic units with dinosaur trace fossils#Eggs or nests

References

1. Casadio, S., T. Manera, A. Parras, C. L. Montalvo (2002) Huevos de dinosaurios (Faveoloolithidae) del Cretácico superior de la Cuenca del Colorado, Provincia de La Pampa, Argentina. Ameghiniana. 39(3):285–293.
2. Weishampel; et al. (2004). "Dinosaur distribution". In Weishampel, David B.; Dodson, Peter; Osmólska, Halszka (eds.). The dinosauria (2nd ed.). Berkeley: Univ. of California Press. pp. 604. ISBN 978-0-520-24209-8.
3. López, 2017, p.19
4. Hucal eggsite locality A at Fossilworks.org

Bibliography

• López, Gisela Romina. 2017. Sedimentología e inferencias ambientales de los depósitos de la Formación Colorado (Campaniano-Maastrichtiano), Departamento Hucal, Provincia de La Pampa (BSc. thesis), 1–95. Universidad Nacional de La Pampa. Accessed 2018-09-07.