Earth:La Portada Formation
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| La Portada Formation Stratigraphic range: Miocene–Pliocene | |
|---|---|
 View of La Portada, the namesake arch made of La Portada Formation rocks resting on darker rocks of Jurassic La Negra Formation | |
| Type | Geological formation |
| Sub-units | Cerro Bandurrias & Cuesta del Burro Members |
| Underlies | Mejillones Formation |
| Overlies | Caleta Herradura Formation |
| Lithology | |
| Primary | Sandstone |
| Location | |
| Coordinates | [ ⚑ ] : 23°24′S 70°30′W / 23.4°S 70.5°W |
| Paleocoordinates | [ ⚑ ] 23°36′S 69°30′W / 23.6°S 69.5°W |
| Region | Antofagasta Region |
| Country |  Chile |
| Type section | |
| Named for | La Portada de Antofagasta |
  La Portada Formation (Chile) | |
La Portada Formation (Spanish: Formación La Portada) is a geologic formation of Miocene and Pliocene age located near the Coast Range of northern Chile. The coarse-grained sandstones of the formation contain penguin fossils.[1][2]
See also
- Cerro Ballena
- Coquimbo Formation
- Navidad Formation
References
- ↑ Mejillones Peninsula at Fossilworks.org
- ↑ Chávez, Martín F. (2008). "Los pingüinos fósiles de Sudamérica" (in es). I Simposio - Paleontología Chile - 2008. pp. 116–120. https://www.researchgate.net/publication/296637852.
Further reading
- L. Ragaini, C. di Celma, and G. Cantalamessa. 2008. Warm-water mollusc assemblages from northern Chile (Mejillones Peninsula): new evidence for permanent El Nino-like conditions during Pliocene warmth?. Journal of the Geological Society 165:1075-1084
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