Regadera_Formation

Regadera Formation

Regadera Formation

Geological formation of the Colombian Andes

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).

Quick Facts Type, Underlies ...

Etymology

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

Lithologies

The Regadera Formation consists mainly of quartz arenitic sandstone and conglomerates with some shale beds.[1][2]

Stratigraphy and depositional environment

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

Regadera Formation
Type locality of the Regadera Formation to the south of the Bogotá savanna

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

More information Ma, Age ...
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

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

Notes and references

Notes

  1. [N 1]
    based on Duarte et al. (2019)[42], García González et al. (2009),[43] and geological report of Villavicencio[44]
  2. [N 2]
    based on Duarte et al. (2019)[42] and the hydrocarbon potential evaluation performed by the UIS and ANH in 2009[45]

References

  1. [1]
    Montoya & Reyes, 2005, p.60
  2. [2]
    Bayona et al., 2010, p.5
  3. [3]
    Montoya & Reyes, 2005, p.64
  4. [4]
    Bayona et al., 2010, p.7
  5. [5]
    Bayona et al., 2010, p.11
  6. [6]
    García González et al., 2009, p.27
  7. [7]
    García González et al., 2009, p.50
  8. [8]
    García González et al., 2009, p.85
  9. [9]
    Barrero et al., 2007, p.60
  10. [10]
    Barrero et al., 2007, p.58
  11. [11]
    Plancha 111, 2001, p.29
  12. [12]
    Plancha 177, 2015, p.39
  13. [13]
    Plancha 111, 2001, p.26
  14. [14]
    Plancha 111, 2001, p.24
  15. [15]
    Plancha 111, 2001, p.23
  16. [16]
    Pulido & Gómez, 2001, p.32
  17. [17]
    Pulido & Gómez, 2001, p.30
  18. [18]
    Pulido & Gómez, 2001, pp.21-26
  19. [19]
    Pulido & Gómez, 2001, p.28
  20. [20]
    Correa Martínez et al., 2019, p.49
  21. [21]
    Plancha 303, 2002, p.27
  22. [22]
    Terraza et al., 2008, p.22
  23. [23]
    Plancha 229, 2015, pp.46-55
  24. [24]
    Plancha 303, 2002, p.26
  25. [25]
    Moreno Sánchez et al., 2009, p.53
  26. [26]
    Mantilla Figueroa et al., 2015, p.43
  27. [27]
    Manosalva Sánchez et al., 2017, p.84
  28. [28]
    Plancha 303, 2002, p.24
  29. [29]
    Mantilla Figueroa et al., 2015, p.42
  30. [30]
    Arango Mejía et al., 2012, p.25
  31. [31]
    Plancha 350, 2011, p.49
  32. [32]
    Pulido & Gómez, 2001, pp.17-21
  33. [33]
    Plancha 111, 2001, p.13
  34. [34]
    Plancha 303, 2002, p.23
  35. [35]
    Plancha 348, 2015, p.38
  36. [36]
    Planchas 367-414, 2003, p.35
  37. [37]
    Toro Toro et al., 2014, p.22
  38. [38]
    Plancha 303, 2002, p.21
  39. [39]
    Bonilla et al., 2016, p.19
  40. [40]
    Gómez Tapias et al., 2015, p.209
  41. [41]
    Bonilla et al., 2016, p.22
  42. [42]
    Duarte et al., 2019
  43. [43]
    García González et al., 2009
  44. [44]
    Pulido & Gómez, 2001
  45. [45]
    García González et al., 2009, p.60

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