| La Frontera Formation | |
|---|---|
| Stratigraphic range: Turonian ~ | |
| Type | Geological formation |
| Unit of | Villeta Group |
| Underlies | Conejo Formation |
| Overlies | Simijaca Fm., La Corona Gb. |
| Thickness | up to 206 metres (680 ft) |
| Lithology | |
| Primary | Lydite |
| Other | Limestone |
| Location | |
| Coordinates | 4°54′40″N 74°27′50″W / 4.91111°N 74.46389°W |
| Region | Altiplano Cundiboyacense Eastern Ranges, Andes |
| Country |  Colombia |
| Type section | |
| Named for | La Frontera quarry |
| Named by | Cáceres & Etayo |
| Location | Albán |
| Year defined | 1969 |
| Coordinates | 4°54′40″N 74°27′50″W / 4.91111°N 74.46389°W |
| Region | Cundinamarca, Boyacá |
| Country | Colombia |
 Paleogeography of Northern South America 90 Ma, by Ron Blakey | |
The La Frontera Formation (Spanish: Formación La Frontera, K2F, Ksf) is a geological formation, part of the Villeta Group, of the Altiplano Cundiboyacense and neighbouring areas of the Eastern Ranges of the Colombian Andes. The sequence of limestones and lydites dates to the Late Cretaceous period; Turonian epoch and has a maximum thickness of 206 metres (676 ft).
Fossils of Yaguarasaurus columbianus were said to be found in this formation (listed as "La Frontera Member"), although the geological mapping of the area state the time-equivalent Hondita Formation as the stratigraphic unit present in the Quebradas El Ocal and Itaibe in Huila. The La Frontera Formation does not outcrop south of Cundinamarca. A high diversity of ammonites has been found in the La Frontera Formation.