Usme Formation
| Usme Formation | |
|---|---|
| Stratigraphic range: Late Eocene-Early Oligocene ~ | |
| Type | Geological formation |
| Underlies | Tilatá Formation |
| Overlies | Regadera Formation |
| Thickness | up to 300 m (980 ft) |
| Lithology | |
| Primary | Shale, sandstone, conglomerate |
| Location | |
| Coordinates | Lua error in Module:Coordinates at line 489: attempt to index field 'wikibase' (a nil value). |
| Region | Bogotá savanna, Altiplano Cundiboyacense Eastern Ranges, Andes |
| Country | Colombia |
| Type section | |
| Named for | Usme |
| Named by | Hubach |
| Location | Usme, Bogotá |
| Year defined | 1957 |
| Coordinates | Lua error: callParserFunction: function "#coordinates" was not found. |
| Region | Cundinamarca |
| Country | Colombia |
| File:Blakey 035Ma - COL.jpg Paleogeography of Northern South America 35 Ma, by Ron Blakey | |
The Usme Formation (Spanish: Formación Usme, Tsu, Teu) is a geological formation of the Bogotá savanna, Altiplano Cundiboyacense, Eastern Ranges of the Colombian Andes. The formation consists of a lower part with predominantly shales with intercalated sandstone beds and an upper sequence with sandstones and conglomerates. The Usme Formation dates to the Neogene and Paleogene periods; Late Eocene to Early Oligocene epochs, and has a maximum thickness of 300 metres (980 ft).
Etymology
[edit | edit source]The formation was defined by Hubach in 1957 and named after the locality of Usme, Bogotá.[1]
Description
[edit | edit source]Lithologies
[edit | edit source]The Usme Formation is subdivided into a lower sequence of shales with intercalated sandstones and an upper part of sandstones and conglomerates.[1]
Stratigraphy and depositional environment
[edit | edit source]The Usme Formation unconformably overlies the Regadera Formation and is overlain by the Tilatá Formation.[2] The age has been estimated, based on palynological data, to be Late Eocene to Early Oligocene.[1] The depositional environment has been interpreted as marine with the upper part deposited in a deltaic setting.[3]
Outcrops
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The Usme Formation is found in its type locality in the synclinal of Usme, the valley of the Tunjuelo River.[1]
Regional correlations
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- Legend
- group
- important formation
- fossiliferous formation
- minor formation
- (age in Ma)
- proximal Llanos (Medina)[note 1]
- distal Llanos (Saltarin 1A well)[note 2]
See also
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- File:Cscr-candidate.svg Geology of the Eastern Hills
- File:Symbol b class.svg Geology of the Ocetá Páramo
- File:Symbol c class.svg Geology of the Altiplano Cundiboyacense
Notes and references
[edit | edit source]Notes
[edit | edit source]References
[edit | edit source]- ^ a b c d Montoya & Reyes, 2005, p.65
- ^ Guerrero Uscátegui, 1992, p.6
- ^ Bayona et al., 2010, p.7
- ^ a b c d e f García González et al., 2009, p.27
- ^ a b c d e f García González et al., 2009, p.50
- ^ a b García González et al., 2009, p.85
- ^ a b c d e f g h i j Barrero et al., 2007, p.60
- ^ a b c d e f g h Barrero et al., 2007, p.58
- ^ Plancha 111, 2001, p.29
- ^ a b Plancha 177, 2015, p.39
- ^ a b Plancha 111, 2001, p.26
- ^ Plancha 111, 2001, p.24
- ^ Plancha 111, 2001, p.23
- ^ a b Pulido & Gómez, 2001, p.32
- ^ Pulido & Gómez, 2001, p.30
- ^ a b Pulido & Gómez, 2001, pp.21-26
- ^ Pulido & Gómez, 2001, p.28
- ^ Correa Martínez et al., 2019, p.49
- ^ Plancha 303, 2002, p.27
- ^ Terraza et al., 2008, p.22
- ^ Plancha 229, 2015, pp.46-55
- ^ Plancha 303, 2002, p.26
- ^ Moreno Sánchez et al., 2009, p.53
- ^ Mantilla Figueroa et al., 2015, p.43
- ^ Manosalva Sánchez et al., 2017, p.84
- ^ a b Plancha 303, 2002, p.24
- ^ a b Mantilla Figueroa et al., 2015, p.42
- ^ Arango Mejía et al., 2012, p.25
- ^ Plancha 350, 2011, p.49
- ^ Pulido & Gómez, 2001, pp.17-21
- ^ Plancha 111, 2001, p.13
- ^ Plancha 303, 2002, p.23
- ^ Plancha 348, 2015, p.38
- ^ Planchas 367-414, 2003, p.35
- ^ Toro Toro et al., 2014, p.22
- ^ Plancha 303, 2002, p.21
- ^ a b c d Bonilla et al., 2016, p.19
- ^ Gómez Tapias et al., 2015, p.209
- ^ a b Bonilla et al., 2016, p.22
- ^ a b Duarte et al., 2019
- ^ García González et al., 2009
- ^ Pulido & Gómez, 2001
- ^ García González et al., 2009, p.60
Bibliography
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Maps
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External links
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- Geologic formations of Colombia
- Paleogene Colombia
- Eocene Series of South America
- Oligocene Series of South America
- Tinguirirican
- Divisaderan
- Lutetian Stage
- Priabonian Stage
- Rupelian Stage
- Sandstone formations
- Shale formations
- Deltaic deposits
- Altiplano Cundiboyacense
- Geography of Cundinamarca Department
- Geography of Bogotá