Fómeque Formation

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Fómeque Formation
Stratigraphic range: Barremian-Late Aptian~
Geological formation
Villeta Group
Une Formation
Las Juntas Formation
up to 1,200 m (3,900 ft)
Organic shale
Limestone, sandstone
.mw-parser-output .geo-default,.mw-parser-output .geo-dms,.mw-parser-output .geo-dec{display:inline}.mw-parser-output .geo-nondefault,.mw-parser-output .geo-multi-punct,.mw-parser-output .geo-inline-hidden{display:none}.mw-parser-output .longitude,.mw-parser-output .latitude{white-space:nowrap}4°27′07″N 74°03′20″W / 4.45194°N 74.05556°W / 4.45194; -74.05556
Altiplano CundiboyacenseEastern Ranges, Andes
Colombia
Fómeque
Hubach
Fómeque
1957
4°27′07″N 74°03′20″W / 4.45194°N 74.05556°W / 4.45194; -74.05556
Cundinamarca, Boyacá
Colombia
Paleogeography of Northern South America120 Ma, by Ron Blakey

The Fómeque Formation (Spanish: Formación Fómeque, Kif) is a geological formation of the Altiplano Cundiboyacense, Eastern Ranges of the Colombian Andes. The predominantly organic shale formation dates to the Early Cretaceous period; Barremian to Late Aptian epochs and has a maximum thickness of 1,200 metres (3,900 ft).

The formation was defined and named in 1957 by Hubach after Fómeque, Cundinamarca.

The Fómeque Formation has a maximum thickness of 1,200 metres (3,900 ft), and is characterised by a sequence of pyritic organic shales, with limestones and sandstone banks intercalated in the formation. The Fómeque Formation contains high values of TOC. Fossils of Acarthohoplites sp., Melchionites sp., Nicklesia sp., Olcostephanus sp., Pulchellia sp. have been found in the formation.

The Fómeque Formation overlies the Las Juntas Formation and is overlain by the Une Formation. The age has been estimated to be Barremian to Late Aptian. Stratigraphically, the formation is time equivalent with the Mercedes Formation. The formation has been deposited in a shallow marine environment.

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The Fómeque Formation is apart from its type locality, found in other parts of the Eastern Ranges.

Legend

• group
• important formation
• fossiliferous formation
• minor formation
• (age in Ma)
• proximal Llanos (Medina)
• distal Llanos (Saltarin 1A well)

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Geology of the Eastern Hills Geology of the Ocetá Páramo Geology of the Altiplano Cundiboyacense

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