Santa Lucía Formation

Santa Lucía Formation
Stratigraphic range: Maastrichtian-Paleocene
Type Geological formation
Unit of Potosí Basin
Underlies Cayara Formation
Overlies El Molino Formation
Thickness 381.35 m (1,251.1 ft)
Lithology
Primary Shale, marl
Other Siltstone
Location
Coordinates 18°00′46.0″S 65°24′23.4″W / 18.012778°S 65.406500°W / -18.012778; -65.406500Coordinates: 18°00′46.0″S 65°24′23.4″W / 18.012778°S 65.406500°W / -18.012778; -65.406500
Region Cochabamba
Country  Bolivia
Type section
Location Tiupampa, Mizque
Coordinates 18°00′46.0″S 65°24′23.4″W / 18.012778°S 65.406500°W / -18.012778; -65.406500
Approximate paleocoordinates 20°42′S 52°30′W / 20.7°S 52.5°W / -20.7; -52.5

Paleogeography of Northern South America
65 Ma, by Ron Blakey

The Santa Lucía Formation is a Maastrichtian to Paleocene (Danian) geologic formation in Bolivia. Fossil ornithopod tracks have been reported from the Cretaceous lower part of the formation.[1] It is the type formation of the Tiupampan South American land mammal age.

Description

The Santa Lucía Formation is a formation of the Potosí Basin in Bolivia dated to the Paleocene, 60 to 58.2 Ma.[2] It overlies the Cretaceous El Molino Formation and is overlain by the Cayara Formation. The formation is laterally equivalent with the Maíz Gordo Formation of northern Argentina,[3] and time-equivalent with the Salamanca Formation of Argentina, the Maria Farinha Formation of the Paraíba Basin in northern Brazil and the Guaduas Formation of the Altiplano Cundiboyacense and fossiliferous Cerrejón Formation of the Cesar-Ranchería Basin, Colombia.

The 381.35 metres (1,251.1 ft) thick formation consists of reddish sandy shales, marls and siltstones deposited in a fluvial to lacustrine environment.[4][5]

Fossil content

The fossiliferous formation has provided the following fossils:

Group Fossils Notes
MammalsAlcidedorbignya inopinata, Allqokirus australis, Andinodelphys cochabambensis, Andinodus boliviensis, Incadelphys antiquus, Jaskhadelphys minutus, Khasia cordillerensis, Kollpania tiupampina, Mayulestes ferox, Mizquedelphys pilpinensis, Molinodus suarezi, Peradectes austrinum, Pucadelphys andinus, Pucanodus gagnieri, Roberthoffstetteria nationalgeographica, Simoclaenus sylvaticus, Szalinia gracilis, Tiulordia floresi, Tiuclaenus minutus, Cimolestes sp., Didelphoidea indet., Henricosborniidae or Oldfieldthomasiidae, Proteutheria indet.
Reptiles & amphibiansConiophis sp., Estesiella boliviensis, Kataria anisodonta, Podocnemis ?brasiliensis, Roxochelys cf. vilavilensis, Sokotosuchus aff. ianwilsoni, Zulmasuchus, Aniliidae, Boidae, ?Madtsoiidae, Tropidophiidae, Gymnophiona
FishesAndinichthys bolivianensis, Dajetella sudamericana, Enchodus oliveirai, Gasteroclupea branisai, Hoffstetterichthys pucai, Incaichthys suarezi, Lepidosiren cf. paradoxa, Phareodusichthys tavernei, Eohiodon sp., Hoplias sp., Lepisosteus sp., Miletes sp., Percichthys sp., Phareodus sp., Rhineastes sp., Rhodsia sp., Ictaluridae indet.

See also

References

  1. ↑ Weishampel, et al., 2004, pp.517-607
  2. ↑ Sempere et al., 1997, p.709
  3. ↑ Sempere et al., 1997, p.712
  4. ↑ Jiménez, 2012, p.11
  5. ↑ Renner & Velasco, 2000, p.25
  6. 1 2 3 Gayet et al., 1991, p.403
  7. 1 2 3 Tiupampa 1 at Fossilworks.org
  8. ↑ Buffetaut & Marshall, 1991
  9. ↑ Rage, 1991a, pp.499-501
  10. ↑ Rage, 1991b, pp.503-508

Bibliography

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