| 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 |
| Approximate paleocoordinates | 41°18′S 49°48′W / 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) | |
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
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
- ^ 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.
- ^ 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.
- ^ a b López, 2017, p.19
- ^ 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.
Categories:
- Geologic formations of Argentina
- Upper Cretaceous Series of South America
- Cretaceous Argentina
- Campanian Stage
- Maastrichtian Stage of South America
- Sandstone formations
- Conglomerate formations
- Alluvial deposits
- Fluvial deposits
- Ooliferous formations
- Fossiliferous stratigraphic units of South America
- Paleontology in Argentina
- Geology of La Pampa Province