Earth:Une Formation

Une Formation Stratigraphic range: Albian-Cenomanian ~105–97 Ma PreЄ Є O S D C P T J K Pg N
Type	Geological formation
Unit of	Villeta Group
Underlies	Chipaque Formation
Overlies	Fómeque Fm., Tibasosa Fm.
Thickness	up to 1,100 m (3,600 ft)
Lithology
Primary	Sandstone
Location
Coordinates
Region	Altiplano Cundiboyacense Eastern Ranges, Andes
Country	Colombia
Type section
Named for	Une
Named by	Hubach
Location	Une
Year defined	1957
Coordinates	[ ⚑ ] 4°27′07″N 74°03′20″W
Region	Cundinamarca, Boyacá
Country	Colombia
Paleogeography of Northern South America 105 Ma, by Ron Blakey

The Une Formation (Spanish: 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 1,100 metres (3,600 ft).

Etymology

The formation was defined in 1957 by Hubach after Une, Cundinamarca.

Description

Lithologies

The Une Formation has a maximum thickness of 1,100 metres (3,600 ft) and is characterised by a sequence of sandstones. Fossils of Heminautilus etheringtoni have been found in the Une Formation.

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 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.

Outcrops

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

See also

Geology of the Eastern Hills

Geology of the Ocetá Páramo

Geology of the Altiplano Cundiboyacense

References

Bibliography

• Acosta Garay, Jorge E.; Ulloa Melo, Carlos E. (2002), Mapa Geológico del Departamento de Cundinamarca - 1:250,000 - Memoria explicativa, INGEOMINAS, pp. 1–108, http://nebula.wsimg.com/ca3411dab87400d504f8461f0256772a?AccessKeyId=75F883B260454DDA3D4B&disposition=0&alloworigin=1, retrieved 2017-04-26 
• Badouin, Cyril; Delanoy, Gérard; Moreno Bedmar, Josep Antón; Pictet, Antoine; Vermeulen, Jean; Conte, Gabriel; Gonnet, Roland; Boselli, Patrick et al. (2016), "Revision of the Early Cretaceous genera Heminautilus SPATH, 1927, and Josanautilus MARTÍNEZ & GRAUGES, 2006 (Nautilida, Cenoceratidae)", Carnets Geologicás 16 (5): 61–212, doi:10.4267/2042/58977, http://paleopolis.rediris.es/cg/1605/CG1605.pdf, retrieved 2017-01-20 
• García González, Mario; Mier Umaña, Ricardo; Cruz Guevara, Luis Enrique; Vásquez, Mauricio (2009), Informe Ejecutivo - evaluación del potencial hidrocarburífero de las cuencas colombianas, Universidad Industrial de Santander, pp. 1–219 
• Villamil, Tomas (2012), Chronology Relative Sea Level History and a New Sequence Stratigraphic Model for Basinal Cretaceous Facies of Colombia, Society for Sedimentary Geology (SEPM), pp. 161–216 

Maps

• Renzoni, Giancarlo; Rosas, Humberto (2009), Plancha 171 - Duitama - 1:100,000, INGEOMINAS, pp. 1, https://drive.google.com/open?id=0BwFQPMJEi17QVU40dC0wUzhzTkk, retrieved 2017-06-06 
• Ulloa, Carlos E.; Guerra, Álvaro; Escovar, Ricardo (1998), Plancha 172 - Paz de Río - 1:100,000, INGEOMINAS, pp. 1, https://drive.google.com/open?id=0BwFQPMJEi17QalZXUHRfM0I2eFk, retrieved 2017-06-06 
• Renzoni, Giancarlo; Rosas, Humberto; Etayo Serna, Fernando (1998), Plancha 191 - Tunja - 1:100,000, INGEOMINAS, pp. 1, https://drive.google.com/open?id=0BwFQPMJEi17QQzhBTXNwUWJuUDg, retrieved 2017-06-06 
• Ulloa, Carlos E.; Rodríguez, Erasmo; Escovar, Ricardo (1998), Plancha 192 - Laguna de Tota - 1:100,000, INGEOMINAS, pp. 1, https://drive.google.com/open?id=0BwFQPMJEi17QTmFMZTdRVDdDWWc, retrieved 2017-06-06 
• Renzoni, Giancarlo (1992), Plancha 193 - Yopal - 1:100,000, INGEOMINAS, pp. 1, https://drive.google.com/open?id=0BwFQPMJEi17QSGFkd3N5ekJCd2s, retrieved 2017-06-06 
• Montoya, Diana María; Reyes, Germán (2009), Plancha 209 - Zipaquirá - 1:100,000, INGEOMINAS, pp. 1, https://drive.google.com/open?id=0BwFQPMJEi17QYUdHRWFiN1JrVms, retrieved 2017-06-06 
• Terraza, Roberto; Moreno, Giovanni; Buitrago, José A.; Pérez, Adrián; Montoya, Diana María (2010), Plancha 210 - Guateque - 1:100,000, INGEOMINAS, pp. 1, https://drive.google.com/open?id=0BwFQPMJEi17QS1VHUTg1MEpNcHM, retrieved 2017-06-06 
• Ulloa, Carlos; Rodríguez, Erasmo (2009), Plancha 211 - Tauramena - 1:100,000, INGEOMINAS, pp. 1, https://drive.google.com/open?id=0BwFQPMJEi17QV1B0QjNpc2ZjQm8, retrieved 2017-06-06 
• Buitrago, José Alberto; Terraza M., Roberto; Etayo, Fernando (1998), Plancha 228 - Santafé de Bogotá Noreste - 1:100,000, INGEOMINAS, pp. 1, https://drive.google.com/open?id=0BwFQPMJEi17QTlNraVVZZ2ZCY0E, retrieved 2017-06-06 
• Acosta, Jorge E.; Ulloa, Carlos E. (1998), Plancha 246 - Fusagasugá - 1:100,000, INGEOMINAS, pp. 1, https://drive.google.com/open?id=0BwFQPMJEi17QNkY5UEloZU9pdEk, retrieved 2017-06-06 
• Acosta, Jorge; Calcedo, Juan Carlos; Ulloa, Carlos (1999), Plancha 265 - Icononzo - 1:100,000, INGEOMINAS, pp. 1, https://drive.google.com/open?id=0BwFQPMJEi17QUVIxRzhsZ2RyTk0, retrieved 2017-06-06 
• Pulido, Orlando; Gómez, Luz Stella; Marín, Pedro (1998), Plancha 266 - Villavicencio - 1:100,000, INGEOMINAS, pp. 1, https://drive.google.com/open?id=0BwFQPMJEi17QVmt4VUpnVjhBb1k, retrieved 2017-06-06 
• Acosta, Jorge; Caro, Pablo; Fuquen, Jaime; Osorno, José (2002), Plancha 303 - Colombia - 1:100,000, INGEOMINAS, pp. 1 

External links

• Gómez, J.; Montes, N.E.; Nivia, Á.; Diederix, H. (2015), Plancha 5-09 del Atlas Geológico de Colombia 2015 – escala 1:500,000, Servicio Geológico Colombiano, pp. 1, https://www.researchgate.net/publication/309533589, retrieved 2017-03-16