Regadera Formation
| Regadera Formation | |
|---|---|
| Stratigraphic range: Middle to Late Eocene ~ | |
| Type | Geological formation |
| Underlies | Usme Fm., Tilatá Fm. |
| Overlies | Bogotá Formation |
| Thickness | up to 756 metres (2,480 ft) |
| Lithology | |
| Primary | Sandstone, conglomerate |
| Other | Shale |
| 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 | La Regadera Reservoir |
| Named by | Julivert |
| Location | Usme, Bogotá |
| Year defined | 1963 |
| Coordinates | Lua error: callParserFunction: function "#coordinates" was not found. |
| Region | Cundinamarca |
| Country | Colombia |
| File:Blakey 050Ma - COL.jpg Paleogeography of Northern South America 50 Ma, by Ron Blakey | |
The Regadera Formation (Spanish: Formación Regadera, E2r, Tpr) is a geological formation of the Bogotá savanna, Altiplano Cundiboyacense, Eastern Ranges of the Colombian Andes. The predominantly sandstone and conglomeratic formation, with pink shale beds intercalated, dates to the Paleogene period; Middle to Late Eocene epoch, and has a maximum thickness of 765 metres (2,510 ft).
Etymology
[edit | edit source]The formation was first described by Hubach in 1931 as part of the Usme Formation and redefined and named in 1963 by Julivert after the La Regadera Reservoir.[1]
Description
[edit | edit source]Lithologies
[edit | edit source]The Regadera Formation consists mainly of quartz arenitic sandstone and conglomerates with some shale beds.[1][2]
Stratigraphy and depositional environment
[edit | edit source]The Regadera Formation overlies the Bogotá Formation and is overlain by the Usme and Tilatá Formations. The age has been estimated, based on palynological data of Echitriporites trianguliformis var. orbicularis, Nothofagidites sp. and Multiporopollenites pauciporatus, to be Middle to Late Eocene.[3] The depositional environment has been interpreted as a braided river setting.[4]
Outcrops
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The Regadera Formation is apart from its type locality in the synclinal of Usme, the valley of the Tunjuelo River, found in the synclinal of Sisga.[1] In the Tunjuelo River valley, the Regadera Formations is present in the escarpments on the river banks.[5]
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
[edit | edit source]- File:GA 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 Montoya & Reyes, 2005, p.60
- ^ Bayona et al., 2010, p.5
- ^ Montoya & Reyes, 2005, p.64
- ^ Bayona et al., 2010, p.7
- ^ Bayona et al., 2010, p.11
- ^ 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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