Guadalupe Group
| Guadalupe Group Stratigraphic range: Campanian-Maastrichtian ~80–70 Ma |
|
|---|---|
Guadalupe Hill
Type locality of the Guadalupe Group |
|
| Type | Geological group |
| Sub-units |
Arenisca Labor-Tierna Plaeners Arenisca Dura |
| Underlies | Guaduas Formation |
| Overlies |
Villeta Group Conejo Fm. & Chipaque Fm. |
| Lithology | |
| Primary | Sandstone, shale |
| Other | Salt (allochtonous) |
| Location | |
| Coordinates | 4°35′31″N 74°03′15″W / 4.59194°N 74.05417°WCoordinates: 4°35′31″N 74°03′15″W / 4.59194°N 74.05417°W |
| Region |
Altiplano Cundiboyacense Eastern Ranges, Andes |
| Country |
 Colombia
|
| Type section | |
| Named for | Guadalupe Hill |
| Named by | Pérez & Salazar |
| Year defined | 1978 |
| Coordinates | 4°35′31″N 74°03′15″W / 4.59194°N 74.05417°W |
| Region | Cundinamarca, Boyacá |
| Country |
Colombia
|
| Thickness at type section | 750 metres (2,460 ft) |
 Paleogeography of Northern South America 65 Ma, by Ron Blakey |
|
The Guadalupe Group (Spanish: Grupo Guadalupe, K2G, Ksg) is a geological group of the Altiplano Cundiboyacense, Eastern Ranges of the Colombian Andes. The group, a sequence of shales and sandstones, is subdivided into three formations; Arenisca Dura, Plaeners and Arenisca Labor-Tierna, and dates to the Late Cretaceous period; Campanian-Maastrichtian epochs and at its type section has a thickness of 750 metres (2,460 ft).
The group was published in 1978 by Pérez and Salazar and named after its type locality Guadalupe Hill in the Eastern Hills of Bogotá.
The Guadalupe Group is characterised by three formations; two sandstone sequences, Arenisca Dura and Arenisca Labor-Tierna, and an intermediate shale formation; Plaeners.
The Guadalupe Group overlies the Conejo Formation in the central part of the Altiplano Cundiboyacense and the Chipaque Formation in the eastern part and is overlain by the Guaduas Formation. Some authors define the Guadalupe Group as a formation and call the individual formations members. The thickness of the Guadalupe Group in its type locality Guadalupe Hill and the El Cable Hill is 750 metres (2,460 ft). The age has been estimated to be Campanian-Maastrichtian. The Guadalupe Group has been deposited in a marine environment.
...
Wikipedia