El Peñón Formation | |
---|---|
Stratigraphic range:
Late Aptian ~ | |
Type | Geological formation |
Unit of | Villeta Group |
Underlies | Capotes Formation |
Overlies | Trincheras Formation |
Thickness | more than 381 m (1,250 ft) |
Lithology | |
Primary | Calcareous shale |
Other | Siltstone, gypsum |
Location | |
Coordinates | 5°15′13″N 74°20′28″W / 5.25361°N 74.34111°W |
Region |
Altiplano Cundiboyacense Eastern Ranges, Andes |
Country | Colombia |
Type section | |
Named for | El Peñón |
Named by | Ulloa |
Location | El Peñón |
Year defined | 1982 |
Coordinates | 5°15′13″N 74°20′28″W / 5.25361°N 74.34111°W |
Region | Cundinamarca |
Country | Colombia |
Thickness at type section | 381 m (1,250 ft) |
Paleogeography of Northern South America 120 Ma, by Ron Blakey |
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.
The formation was defined and named in 1982 by Ulloa after El Peñón, Cundinamarca. [1]
The El Peñón Formation has at is type section a thickness of 381 metres (1,250 ft), [2] and is characterised by a sequence of calcareous shales and siltstones. The middle part of the sequence contains gypsum. [3] Fossils of the ammonites Cheloniceras sp. and Epicheloniceras sp. aff. carlosacostai have been found in the El Peñón Formation. [1]
The El Peñón Formation, part of the Villeta Group, conformably overlies the Trincheras Formation and is conformably overlain by the Capotes Formation. [4] The age has been estimated to be Late Aptian. [1] Stratigraphically, the formation is time equivalent with the Tablazo Formation and a lateral facies equivalent of the Socotá Formation. [5] The formation has been deposited in a shallow marine platform environment. [1] In the Late Aptian, central Colombia was dominated by shallow marine carbonate platform environments. [6]
The El Peñón Formation, restricted to Cundinamarca, is locally found around its type locality, [1] between Bituima and Guayabal de Síquima, [7] and along the road from Villeta to Sasaima. [2]
El Peñón Formation | |
---|---|
Stratigraphic range:
Late Aptian ~ | |
Type | Geological formation |
Unit of | Villeta Group |
Underlies | Capotes Formation |
Overlies | Trincheras Formation |
Thickness | more than 381 m (1,250 ft) |
Lithology | |
Primary | Calcareous shale |
Other | Siltstone, gypsum |
Location | |
Coordinates | 5°15′13″N 74°20′28″W / 5.25361°N 74.34111°W |
Region |
Altiplano Cundiboyacense Eastern Ranges, Andes |
Country | Colombia |
Type section | |
Named for | El Peñón |
Named by | Ulloa |
Location | El Peñón |
Year defined | 1982 |
Coordinates | 5°15′13″N 74°20′28″W / 5.25361°N 74.34111°W |
Region | Cundinamarca |
Country | Colombia |
Thickness at type section | 381 m (1,250 ft) |
Paleogeography of Northern South America 120 Ma, by Ron Blakey |
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.
The formation was defined and named in 1982 by Ulloa after El Peñón, Cundinamarca. [1]
The El Peñón Formation has at is type section a thickness of 381 metres (1,250 ft), [2] and is characterised by a sequence of calcareous shales and siltstones. The middle part of the sequence contains gypsum. [3] Fossils of the ammonites Cheloniceras sp. and Epicheloniceras sp. aff. carlosacostai have been found in the El Peñón Formation. [1]
The El Peñón Formation, part of the Villeta Group, conformably overlies the Trincheras Formation and is conformably overlain by the Capotes Formation. [4] The age has been estimated to be Late Aptian. [1] Stratigraphically, the formation is time equivalent with the Tablazo Formation and a lateral facies equivalent of the Socotá Formation. [5] The formation has been deposited in a shallow marine platform environment. [1] In the Late Aptian, central Colombia was dominated by shallow marine carbonate platform environments. [6]
The El Peñón Formation, restricted to Cundinamarca, is locally found around its type locality, [1] between Bituima and Guayabal de Síquima, [7] and along the road from Villeta to Sasaima. [2]