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).
| 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 | 4°21′40.3″N 74°07′50″W / 4.361194°N 74.13056°W |
| 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 | 4°21′40.3″N 74°07′50″W / 4.361194°N 74.13056°W |
| Region | Cundinamarca |
| Country | Colombia |
 Paleogeography of Northern South America 35 Ma, by Ron Blakey | |
Etymology
editThe formation was defined by Hubach in 1957 and named after the locality of Usme, Bogotá.[1]
Description
editLithologies
editThe 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
editThe 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
editThe Usme Formation is found in its type locality in the synclinal of Usme, the valley of the Tunjuelo River.[1]
Regional correlations
edit- 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
editNotes and references
editNotes
editReferences
edit- ^ 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
edit- Bayona, Germán; Montenegro, Omar; Cardona, Agustín; Jaramillo, Carlos; Lamus, Felipe; Morón, Sara; Quiroz, Luiz; Ruíz, María C.; Valencia and Mauricio Parra, Victor (2010), "Estratigrafía, procedencia, subsidencia y exhumación de las unidades paleógenas en el Sinclinal de Usme, sur de la zona axial de la Cordillera Oriental - Stratigraphy, provenance, subsidence and exhumation of the Paleogene succession in the Usme Syncline, southern axial zone of the Eastern Cordillera" (PDF), Geología Colombiana, 35: 5–35, retrieved 2017-03-16
- Guerrero Uscátegui, Alberto Lobo (1992), Geología e Hidrogeología de Santafé de Bogotá y su Sabana, Sociedad Colombiana de Ingenieros, pp. 1–20
- Montoya Arenas, Diana María; Reyes Torres, Germán Alfonso (2005), Geología de la Sabana de Bogotá, INGEOMINAS, pp. 1–104
Maps
edit- Acosta, Jorge E.; Ulloa, Carlos E. (1998), Plancha 246 - Fusagasugá - 1:100,000, INGEOMINAS, p. 1, retrieved 2017-06-06
External links
edit- Gómez, J.; Montes, N.E.; Nivia, Á.; Diederix, H. (2015), Plancha 5-09 del Atlas Geológico de Colombia 2015 – escala 1:500,000, Servicio Geológico Colombiano, p. 1, retrieved 2017-03-16