The Une Formation ( es, Formación Une, Kiu) is a

geological formation A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics ( lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exp ...

of the

Altiplano Cundiboyacense The Altiplano Cundiboyacense () is a high plateau located in the Eastern Cordillera of the Colombian Andes covering parts of the departments of Cundinamarca and Boyacá. The altiplano corresponds to the ancient territory of the Muisca. The Alt ...

Eastern Ranges The Eastern Ranges is an Australian rules football team in the NAB League, the Victorian statewide under-18s competition. The club is a founding member of the competition (1992) and has produced several players for the Australian Football Leag ...

of the Colombian

Andes The Andes, Andes Mountains or Andean Mountains (; ) are the longest continental mountain range in the world, forming a continuous highland along the western edge of South America. The range is long, wide (widest between 18°S – 20°S ...

. The predominantly

sandstone Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates ...

formation dates to the

Middle Cretaceous The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of t ...

period;

Albian The Albian is both an age of the geologic timescale and a stage in the stratigraphic column. It is the youngest or uppermost subdivision of the Early/Lower Cretaceous Epoch/ Series. Its approximate time range is 113.0 ± 1.0 Ma to 100.5 ± 0 ...

to Cenomanian epochs and has a maximum thickness of .

Etymology

The formation was defined in 1957 by Hubach after Une, Cundinamarca.Acosta & Ulloa, 2002, p.53

Description

Lithologies

The Une Formation has a maximum thickness of and is characterised by a sequence of

s.Acosta & Ulloa, 2002, p.54 Fossils of '' Heminautilus etheringtoni'' have been found in the Une Formation.Badouin et al., 2016, p.87

Stratigraphy and depositional environment

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

- Cenomanian. Stratigraphically, the formation is time equivalent with the Simijaca,

Aguardiente ( Spanish), or ( Portuguese) ( eu, pattar; ca, aiguardent; gl, augardente), is a generic term for alcoholic beverages that contain between 29% and 60% alcohol by volume (ABV). It originates in the Iberian Peninsula (Portugal and Spain) and in ...

, Caballos and Pacho Formations. The formation has been deposited in a near shore deltaic environment.Acosta & Ulloa, 2002, p.46

Outcrops

The Une Formation is apart from its type locality, found on the Sumapaz Páramo.

Regional correlations

Notes

References

Bibliography

* * * *

Maps

* * * * * * * * * * * * *

External links

* {{cite LSA , last=Gómez , first=J. , last2=Montes , first2=N.E. , last3=Nivia , first3=Á. , last4=Diederix , first4=H. , year=2015 , title=Plancha 5-09 del Atlas Geológico de Colombia 2015 – escala 1:500,000 , url=https://www.researchgate.net/publication/309533589_Plancha_5-09_del_Atlas_Geologico_de_Colombia_2015 , publisher= Servicio Geológico Colombiano , pages=1 , accessdate=2017-03-16 Geologic formations of Colombia Cretaceous Colombia Upper Cretaceous Series of South America Lower Cretaceous Series of South America Albian Stage Cenomanian Stage Sandstone formations Deltaic deposits Shallow marine deposits Reservoir rock formations Formations Geography of Cundinamarca Department Geography of Boyacá Department Muysccubun