Earth: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
Coordinates [ ⚑ ] : 4°59′34.1″N 73°28′53.8″W / 4.992806°N 73.481611°W / 4.992806; -73.481611
RegionAltiplano Cundiboyacense
Eastern Ranges, Andes
Country Colombia
Type section
Named forGuavio River
Named byRodríguez & Ulloa
LocationAlto de Miralindo, Guateque
Year defined1976
Coordinates [ ⚑ ] 4°59′34.1″N 73°28′53.8″W / 4.992806°N 73.481611°W / 4.992806; -73.481611
RegionCundinamarca, Boyacá
Country Colombia
Blakey 150Ma - COL.jpg
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

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

Description

Lithologies

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

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

Lua error in Module:Location_map at line 522: Unable to find the specified location map definition: "Module:Location map/data/Altiplano Cundiboyacense" does not exist. The Guavio Formation is apart from its type locality at the Alto de Miralindo and Cuchilla de Manizales, found near Gachalá and Medina.[1]

Regional correlations

See also

Featured article candidate Geology of the Eastern Hills
B-Class article Geology of the Ocetá Páramo
C-Class article Geology of the Altiplano Cundiboyacense

References

  1. 1.0 1.1 1.2 1.3 Acosta & Ulloa, 2002, p.51

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.
  • 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

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

External links