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°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) | |
Description
editThe 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
editReferences
edit- ^ 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
edit- 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