Guavio Formation

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Guavio Formation
Stratigraphic range: Tithonian-Berriasian
~150–140 Ma
TypeGeological formation
Unit ofCáqueza Group
Sub-unitsCaliza de Las Mercedes Mb.
Lutitas de Las Mercedes Mb.
Caliza de Malacara Mb.
Lutitas de Miralindo Mb.
Conglomerado de Miralindo
UnderliesMacanal Formation
OverliesBatá Fm., Girón Fm
Thicknessup to 1,000 m (3,300 ft)
Lithology
PrimaryConglomerate
OtherLimestone, shale
Location
Coordinates4°59′34.1″N 73°28′53.8″W / 4.992806°N 73.481611°W / 4.992806; -73.481611
RegionAltiplano Cundiboyacense
Eastern Ranges, Andes
CountryColombia
Type section
Named forGuavio River
Named byRodríguez & Ulloa
LocationAlto de Miralindo, Guateque
Year defined1976
Coordinates4°59′34.1″N 73°28′53.8″W / 4.992806°N 73.481611°W / 4.992806; -73.481611
RegionCundinamarca, Boyacá
CountryColombia

Paleogeography of Northern South America
150 Ma, by Ron Blakey

The Guavio Formation (Spanish: Calizas del Guavio, Kicg) is a geological formation of the Altiplano Cundiboyacense, Eastern Ranges of the Colombian Andes. The formation consists of conglomerates, shales and limestones, dates to the Late Jurassic and Early Cretaceous periods; Tithonian to Berriasian epochs and has a maximum thickness of 1,000 metres (3,300 ft).

Etymology

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The formation was defined and named in 1976 by Rodríguez and Ulloa after the Guavio River, Cundinamarca.[1]

Description

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Lithologies

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The Guavio Formation has a maximum thickness of 1,000 metres (3,300 ft), and is characterised by a sequence of conglomerates, shales and limestones.[1]

Stratigraphy and depositional environment

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The Guavio Formation, the lowermost unit of the Cáqueza Group, overlies the Batá Formation and is overlain by the Macanal Formation. The unit is subdivided into five members, from old to younger; Conglomerado de Miralindo, Lutitas de Miralindo, Caliza de Malacara, Lutitas de Las Mercedes and Caliza de Las Mercedes. The age has been estimated to be Tithonian to Berriasian, spanning the Jurassic-Cretaceous boundary. Stratigraphically, the formation is time equivalent with the Arcabuco Formation. The formation has been deposited in a shallow marine environment in an oxygen-poor basin.[1]

Outcrops

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Guavio Formation is located in the Altiplano Cundiboyacense
Guavio Formation
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Type locality of the Guavio Formation to the east of the Altiplano Cundiboyacense

The Guavio Formation is apart from its type locality at the Alto de Miralindo and Cuchilla de Manizales, found near Gachalá and Medina.[1]

See also

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Geology of the Eastern Hills
Geology of the Ocetá Páramo
Geology of the Altiplano Cundiboyacense

References

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  1. ^ a b c d Acosta & Ulloa, 2002, p.51

Bibliography

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  • Acosta Garay, Jorge E.; Ulloa Melo, Carlos E. (2002), Mapa Geológico del Departamento de Cundinamarca - 1:250,000 - Memoria explicativa, INGEOMINAS, pp. 1–108, retrieved 2017-04-26
  • 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

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  • Acosta, Jorge E; Ulloa, Carlos E. (1998), Plancha 246 - Geología de Fusagasugá - 1:100,000, INGEOMINAS, p. 1
  • Ulloa, Carlos E; Rodríguez, Erasmo; Acosta, Jorge E. (1998), Plancha 227 - Geología de La Mesa - 1:100,000, INGEOMINAS, p. 1
  • Ulloa, Carlos E; Rodríguez, Erasmo; Escovar, Ricardo (1998), Plancha 192 - Geología de Laguna de Tota - 1:100,000, INGEOMINAS, p. 1
  • Renzoni, Giancarlo; Rosas, Humberto; Etayo Serna, Fernando (1998), Plancha 191 - Geología de Tunja - 1:100,000, INGEOMINAS, p. 1
  • Fuquen M., Jaime A; Osorno M, José F. (2009), Plancha 190 - Geología de Chiquinquirá - 1:100,000, INGEOMINAS, p. 1
  • Ulloa, Carlos E; Guerra, Álvaro; Escovar, Ricardo (1998), Plancha 172 - Geología de Paz de Río - 1:100,000, INGEOMINAS, p. 1
  • Velandia, Francisco; Cepeda, Héctor (2005), Planchas 171 & 191 - Geología sector del sur del municipio de Paipa (Boyacá) - 1:25,000, INGEOMINAS
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