Siamaná Formation
| Siamaná Formation | |
|---|---|
| Stratigraphic range: Mid-Late Oligocene ~ | |
| Type | Geological formation |
| Unit of | Cocinetas Basin |
| Underlies | Uitpa Formation |
| Overlies | Macarao Formation |
| Thickness | 430 m (1,410 ft) |
| Lithology | |
| Primary | Conglomerate |
| Other | Limestone |
| Location | |
| Coordinates | 11°58′00″N 71°22′43″W / 11.96667°N 71.37861°W |
| Region | La Guajira Caribbean region |
| Country | Colombia |
| Type section | |
| Named for | Siamaná |
| Named by | Renz |
| Location | Uribia |
| Year defined | 1960 |
| Coordinates | 11°58′00″N 71°22′43″W / 11.96667°N 71.37861°W |
| Region | La Guajira |
| Country | Colombia |
Type locality of the formation in La Guajira | |
The Siamaná Formation (Spanish: Formación Siamaná, E3s) is a fossiliferous geological formation of the Cocinetas Basin in the northernmost department of La Guajira. The formation consists of conglomerates and limestones. The Siamaná Formation dates to the Paleogene period; Middle to Late Oligocene epoch, corresponding to the Deseadan in the SALMA classification.