Une Formation

Une Formation
Une Formation
Stratigraphic range: Albian-Cenomanian; ~105–97 Ma PreꞒ Ꞓ 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	4°27′07″N 74°03′20″W / 4.45194°N 74.05556°W
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 / 4.45194°N 74.05556°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.^[1]

Description

Lithologies

The Une Formation has a maximum thickness of 1,100 metres (3,600 ft) and is characterised by a sequence of sandstones.^[2] Fossils of Heminautilus etheringtoni have been found in the Une Formation.^[3]

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.^[4]

Outcrops

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Type locality of the Une Formation to the south of the Bogotá savanna

The Une Formation is apart from its type locality, found on the Sumapaz Páramo.^[2]

Regional correlations

Cretaceous stratigraphy of the central Colombian Eastern Ranges
Age	VMM	Guaduas-Vélez		W Emerald Belt		Villeta anticlinal		Chiquinquirá- Arcabuco	Tunja- Duitama	Altiplano Cundiboyacense		El Cocuy
Maastrichtian	Umir	Córdoba		Seca		eroded		Guaduas				Colón-Mito Juan
Maastrichtian				Umir				Guadalupe
Campanian				Córdoba
Campanian				Oliní
Santonian	La Luna	Cimarrona - La Tabla										La Luna
Coniacian		Oliní				Villeta	Conejo		Chipaque
Coniacian		Güagüaquí	Loma Gorda	undefined			La Frontera
Turonian		Güagüaquí	Hondita	La Frontera	Otanche		La Frontera
Cenomanian	Simití	hiatus		La Corona			Simijaca					Capacho
Cenomanian				Pacho Fm.			Hiló - Pacho	Churuvita	Une			Aguardiente
Albian				Hiló			Hiló - Pacho	Chiquinquirá	Tibasosa	Une		Aguardiente
Albian	Tablazo			Tablazo			Capotes - La Palma - Simití	Simití		Une		Tibú-Mercedes
Aptian	Tablazo			Capotes			Socotá - El Peñón	Paja		Fómeque		Tibú-Mercedes
	Paja			Paja	El Peñón		Trincheras					Río Negro
						La Naveta
Barremian
Hauterivian					Muzo					Cáqueza	Las Juntas
Hauterivian	Rosablanca				Muzo			Ritoque			Las Juntas
Valanginian				Ritoque	Furatena	Útica - Murca		Rosablanca	hiatus		Macanal
Valanginian				Rosablanca	Furatena			Rosablanca			Macanal
Berriasian	Cumbre			Cumbre				Los Medios			Guavio
Berriasian	Tambor			Arcabuco				Cumbre			Guavio
Sources

References

^ Acosta & Ulloa, 2002, p.53
^ ^a ^b Acosta & Ulloa, 2002, p.54
^ Badouin et al., 2016, p.87
^ Acosta & Ulloa, 2002, p.46

Bibliography

Acosta Garay, Jorge E., and Carlos E. Ulloa Melo. 2002. Mapa Geológico del Departamento de Cundinamarca - 1:250,000 - Memoria explicativa, 1–108. INGEOMINAS. Accessed 2017-04-26.
Badouin, Cyril; Gérard Delanoy; Josep Antón Moreno Bedmar; Antoine Pictet; Jean Vermeulen; Gabriel Conte; Roland Gonnet; Patrick Boselli, and Marc Bonelli. 2016. Revision of the Early Cretaceous genera Heminautilus SPATH, 1927, and Josanautilus MARTÍNEZ & GRAUGES, 2006 (Nautilida, Cenoceratidae). Carnets Geologicás 16. 61-212. Accessed 2017-01-20.
García González, Mario; Ricardo Mier Umaña; Luis Enrique Cruz Guevara, and Mauricio Vásquez. 2009. Informe Ejecutivo - evaluación del potencial hidrocarburífero de las cuencas colombianas, 1-219. Universidad Industrial de Santander.
Villamil, Tomas. 2012. Chronology Relative Sea Level History and a New Sequence Stratigraphic Model for Basinal Cretaceous Facies of Colombia, 161–216. Society for Sedimentary Geology (SEPM).

Maps

Renzoni, Giancarlo, and Humberto Rosas. 2009. Plancha 171 - Duitama - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06.
Ulloa, Carlos E.; Álvaro Guerra, and Ricardo Escovar. 1998. Plancha 172 - Paz de Río - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06.
Renzoni, Giancarlo; Humberto Rosas, and Fernando Etayo Serna. 1998. Plancha 191 - Tunja - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06.
Ulloa, Carlos E.; Erasmo Rodríguez, and Ricardo Escovar. 1998. Plancha 192 - Laguna de Tota - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06.
Renzoni, Giancarlo. 1992. Plancha 193 - Yopal - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06.
Montoya, Diana María, and Germán Reyes. 2009. Plancha 209 - Zipaquirá - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06.
Terraza, Roberto; Giovanni Moreno; José A. Buitrago; Adrián Pérez, and Diana María Montoya. 2010. Plancha 210 - Guateque - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06.
Ulloa, Carlos, and Erasmo Rodríguez. 2009. Plancha 211 - Tauramena - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06.
Buitrago, José Alberto; Roberto Terraza M., and Fernando Etayo. 1998. Plancha 228 - Santafé de Bogotá Noreste - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06.
Acosta, Jorge E., and Carlos E. Ulloa. 1998. Plancha 246 - Fusagasugá - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06.
Acosta, Jorge; Juan Carlos Calcedo, and Carlos Ulloa. 1999. Plancha 265 - Icononzo - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06.
Pulido, Orlando; Luz Stella Gómez, and Pedro Marín. 1998. Plancha 266 - Villavicencio - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06.
Acosta, Jorge; Pablo Caro; Jaime Fuquen, and José Osorno. 2002. Plancha 303 - Colombia - 1:100,000, 1. INGEOMINAS.

External links

Gómez, J.; N.E. Montes; Á. Nivia, and H. Diederix. 2015. Plancha 5-09 del Atlas Geológico de Colombia 2015 – escala 1:500,000, 1. Servicio Geológico Colombiano. Accessed 2017-03-16.

[Acosta2002_p53-1] Acosta & Ulloa, 2002, p.53

[Acosta2002_p54-2] Acosta & Ulloa, 2002, p.54

[Badouin_p87-3] Badouin et al., 2016, p.87

[Acosta2002_p46-4] Acosta & Ulloa, 2002, p.46

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