Oliní Group
The Oliní Group (Spanish: Grupo Oliní, K3k5o, K2ol, Kso) is a fossiliferous geological group of the VMM, VSM and the eastern flanks of the Central and western flanks of the Eastern Ranges of the Colombian Andes. The regional group stretches from north to south across approximately 700 kilometres (430 mi) and dates to the Late Cretaceous period; Coniacian, Santonian and Campanian epochs, and has a maximum thickness of 287 metres (942 ft). Fossils of Eonatator coellensis have been found in the unit, near Coello, Tolima.
| Oliní Group | |
|---|---|
| Stratigraphic range: Coniacian-Campanian ~ | |
| Type | Geological group |
| Sub-units | See text |
| Underlies | Córdoba Fm., La Tabla Fm. |
| Overlies | Güagüaquí Group Loma Gorda Formation |
| Thickness | up to 287 m (942 ft) |
| Lithology | |
| Primary | Radiolarite, siltstone, chert, mudstone |
| Other | Sandstone, limestone, conglomerate |
| Location | |
| Coordinates | 3°44′12.6″N 75°27′55.5″W |
| Region | VMM, VSM and Central, Eastern Ranges, Andes |
| Country | Colombia |
| Extent | ~700 km (430 mi) |
| Type section | |
| Named for | Quebrada Oliní |
| Named by | Peters |
| Location | Chaparral, Tolima |
| Year defined | 1954 |
| Coordinates | 3°44′12.6″N 75°27′55.5″W |
| Approximate paleocoordinates | 1.5°N 54.5°W |
| Region | Cundinamarca, Boyacá, Huila, Santander, Tolima |
| Country | Colombia |
Paleogeography of Northern South America 90 Ma, by Ron Blakey | |
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