The Villeta Group (Spanish: Grupo Villeta) is a geological group of the Eastern Ranges of the Colombian Andes, to the west of the Altiplano Cundiboyacense. The group, a sequence of shales, limestones and sandstones, is subdivided into various formations; Conejo, La Frontera, Simijaca, Hiló, Pacho, Chiquinquirá, Capotes, Socotá, El Peñón, and Trincheras, and dates to the Cretaceous period; Aptian-Coniacian epochs. The group stretches out across four departments, from Huila in the south, through Cundinamarca and Boyacá to southern Santander in the north. The upper part of the Villeta Group is time-equivalent with the La Luna Formation of the Middle Magdalena Valley (VMM) and Sierra Nevada del Cocuy, the Oliní and Güagüaquí Groups of the Guaduas-Vélez synclinal and the Chipaque Formation of the Altiplano Cundiboyacense. The lower part has been correlated with the Simití, Tablazo and Paja Formations of the VMM, the upper Tibasosa, Une and Fómeque Formations of the Altiplano Cundiboyacense and the Capacho, Aguardiente, Tibú-Mercedes and upper Río Negro Formations of the Sierra Nevada del Cocuy.

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Villeta Group
Stratigraphic range: Aptian-Coniacian ~125–87 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Villeta, type locality of the Villeta Group
Type	Geological group
Sub-units	Conejo Fm., La Frontera Fm., Simijaca Fm., Hiló Fm., Pacho Fm., Chiquinquirá Sst., Capotes Fm., Socotá Fm., El Peñón Fm., Trincheras Fm.
Underlies	Guadalupe Group
Overlies	La Naveta Formation
Lithology
Primary	Sandstone, shale, limestone
Location
Coordinates	5°00′59″N 74°28′54″W
Region	Altiplano Cundiboyacense Eastern Ranges, Andes
Country	Colombia
Type section
Named for	Villeta
Named by	Humboldt
Year defined	1810
Coordinates	4°35′31″N 74°03′15″W
Region	Cundinamarca, Boyacá, Huila, Santander
Country	Colombia
Paleogeography of northern South America 105 Ma, by Ron Blakey

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The group was first described by Alexander Von Humboldt around 1810 as the " Villeta Tonschiefer", German name for Villeta's clay slate.^[1] The group was subsequently published in 1892 by Hettner in his book Die Kordilleren von Bogotá and named after its type locality Villeta on the western flanks of the Eastern Ranges of the Colombian Andes.^[2]

Type locality of the Villeta Group to the northwest of the Bogotá savanna

The formations of the Villeta Group are apart from its type locality near Villeta, found in other parts of the western flanks of the Eastern Ranges, stretching from Huila in the south to southern Santander in the north.^{[6][7][8][9][10][11][12][13][14][15][16]}

Geology of the Eastern Hills

Geology of the Ocetá Páramo

Geology of the Altiplano Cundiboyacense