Chipaque Formation
The Chipaque Formation (Spanish: Formación Chipaque, K2cp, Kc) is a geological formation of the Altiplano Cundiboyacense, Eastern Ranges of the Colombian Andes. The formation is also described as Gachetá Formation, named after Gachetá, in the area of the Llanos foothills of the Eastern Ranges. The predominantly organic shale formation dates to the Late Cretaceous period; Cenomanian-Turonian epochs and has a maximum thickness of 1,700 metres (5,600 ft). The formation, rich in TOC, is an important oil and gas generating unit for the giant oilfields Cupiagua and Cusiana of the Eastern Ranges as well as in the Llanos Orientales.
| Chipaque Formation | |
|---|---|
| Stratigraphic range: Cenomanian-Turonian ~ | |
| Type | Geological formation |
| Unit of | Villeta Group |
| Underlies | Guadalupe Gp Arenisca Dura Fm |
| Overlies | Une Formation |
| Thickness | up to 1,700 metres (5,580 ft) |
| Lithology | |
| Primary | Organic shale |
| Other | Sandstone, limestone, siltstone |
| Location | |
| Coordinates | 4°27′07″N 74°03′20″W |
| Region | Altiplano Cundiboyacense Eastern Ranges, Andes |
| Country | Colombia |
| Type section | |
| Named for | Chipaque |
| Named by | Hubach |
| Location | Chipaque |
| Year defined | 1957 |
| Coordinates | 4°27′07″N 74°03′20″W |
| Region | Cundinamarca, Boyacá |
| Country | Colombia |
| Thickness at type section | 1,027 metres (3,370 ft) |
Paleogeography of Northern South America 90 Ma, by Ron Blakey | |
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