| Une Formation | |
| Period: | Cenomanian |
| Age: | Albian-Cenomanian ~ |
| Type: | Geological formation |
| Prilithology: | Sandstone |
| Unitof: | Villeta Group |
| Underlies: | Chipaque Formation |
| Overlies: | Fómeque Fm., Tibasosa Fm. |
| Thickness: | up to 1100m (3,600feet) |
| Map: | Blakey 105Ma - COL.jpg |
| Coordinates: | 4.4519°N -74.0556°W |
| Region: | Altiplano Cundiboyacense Eastern Ranges, Andes |
| Namedfor: | Une |
| Namedby: | Hubach |
| Year Ts: | 1957 |
| Location Ts: | Une |
| Coordinates Ts: | 4.4519°N -74.0556°W |
| Region Ts: | Cundinamarca, Boyacá |
The Une Formation (Spanish; Castilian: Formación Une, Kiu) is a geological formation of the Altiplano Cundiboyacense, Eastern Ranges of the Colombian Andes. The predominantly sandstone formation dates to the Middle Cretaceous period; Albian to Cenomanian epochs and has a maximum thickness of 1100m (3,600feet).
The formation was defined in 1957 by Hubach after Une, Cundinamarca.[1]
The Une Formation has a maximum thickness of 1100m (3,600feet) and is characterised by a sequence of sandstones.[2] Fossils of Heminautilus etheringtoni have been found in the Une Formation.[3]
The Une Formation, part of the Villeta Group, overlies the Fómeque Formation and is overlain by the Chipaque Formation. The age has been estimated to be Albian-Cenomanian. Stratigraphically, the formation is time equivalent with the Simijaca, Aguardiente, Caballos and Pacho Formations. The formation has been deposited in a near shore deltaic environment.[4]
The Une Formation is apart from its type locality, found on the Sumapaz Páramo.[2]
Geology of the Eastern Hills
Geology of the Ocetá Páramo
Geology of the Altiplano Cundiboyacense