The El Peñón Formation ( Spanish : Formación El Peñón , Kipe) is a geological formation of the Altiplano Cundiboyacense , Eastern Ranges of the Colombian Andes . The formation consists of calcareous shales and siltstones and dates to the Early Cretaceous period; Late Aptian epoch and has a measured thickness at its type section of 381 metres (1,250 ft). Ammonite fossils have been found in the formation, deposited in a shallow marine platform environment.
5-416: The formation was defined and named in 1982 by Ulloa after El Peñón , Cundinamarca . The El Peñón Formation has at is type section a thickness of 381 metres (1,250 ft), and is characterised by a sequence of calcareous shales and siltstones . The middle part of the sequence contains gypsum . Fossils of the ammonites Cheloniceras sp. and Epicheloniceras sp. aff. carlosacostai have been found in
10-452: A shallow marine platform environment . In the Late Aptian, central Colombia was dominated by shallow marine carbonate platform environments. The El Peñón Formation, restricted to Cundinamarca , is locally found around its type locality , between Bituima and Guayabal de Síquima , and along the road from Villeta to Sasaima . El Pe%C3%B1%C3%B3n, Cundinamarca El Peñón
15-496: Is 120 kilometres (75 mi) northwest of the capital Bogotá and thanks to the lower elevation has a temperate climate averaging 21 °C (70 °F). The Lower Cretaceous El Peñón Formation is named after El Peñón. The area of El Peñón before the Spanish conquest was inhabited by the Panche . Modern El Peñón was founded in 1822 by Pedro Bustos as El Peñón de Terama, named after
20-585: Is a municipality and town of Colombia in the department of Cundinamarca . It is located at an altitude of 1,310 metres (4,300 ft) in the western flanks of the Eastern Ranges of the Colombian Andes . The municipality, part of the Rionegro Province borders Topaipí in the north, Vergara and Nimaima in the south, Pacho in the east and La Peña and La Palma in the west. The municipality
25-760: The El Peñón Formation. The El Peñón Formation, part of the Villeta Group , conformably overlies the Trincheras Formation and is conformably overlain by the Capotes Formation . The age has been estimated to be Late Aptian . Stratigraphically, the formation is time equivalent with the Tablazo Formation and a lateral facies equivalent of the Socotá Formation . The formation has been deposited in
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