Une Formation: Difference between revisions

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

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Revision as of 20:06, 26 August 2018

The Une Formation (Template:Lang-es, 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

Maps

External links

Template:Cite LSA

[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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[2]

[3]

[4]

@@ Line 107: / Line 107: @@
 [[Category:Cenomanian Stage]]
 [[Category:Sandstone formations]]
+[[Category:Deltaic deposits]]
+[[Category:Shallow marine deposits]]
+[[Category:Reservoir rock formations]]
 [[Category:Altiplano Cundiboyacense|Formations]]
 [[Category:Geography of Cundinamarca Department]]