Colorado Formation, Argentina

Geologic formation in Argentina

For other uses, see Colorado Formation.

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°12′S 64°30′W﻿ / ﻿38.2°S 64.5°W﻿ / -38.2; -64.5
Approximate paleocoordinates| 41°18′S 49°48′W﻿ / ﻿41.3°S 49.8°W﻿ / -41.3; -49.8
Region| La Pampa Province
Country| Argentina
Extent| Colorado Basin
Type section
Named for| Colorado River

Colorado Formation, Argentina (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]

## Description

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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

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

## References

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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. ^ a b López, 2017, p.19
4. ^ Hucal eggsite locality A at Fossilworks.org

### Bibliography

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* 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) (PDF), Universidad Nacional de La Pampa, pp. 1–95, retrieved 2018-09-07