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Santa Lucía Formation

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Coordinates: 18°00′46.0″S 65°24′23.4″W / 18.012778°S 65.406500°W / -18.012778; -65.406500
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Santa Lucía Formation
Stratigraphic range: Maastrichtian-Paleocene
TypeGeological formation
Unit ofPotosí Basin
UnderliesCayara Formation
OverliesEl Molino Formation
Thickness381.35 m (1,251.1 ft)
Lithology
PrimaryShale, marl
OtherSiltstone
Location
Coordinates18°00′46.0″S 65°24′23.4″W / 18.012778°S 65.406500°W / -18.012778; -65.406500
RegionCochabamba
Country Bolivia
Type section
LocationTiupampa, Mizque
Coordinates18°00′46.0″S 65°24′23.4″W / 18.012778°S 65.406500°W / -18.012778; -65.406500
Approximate paleocoordinates20°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
Mammals Alcidedorbignya 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.
[6][7]
Reptiles & amphibians Coniophis sp., Estesiella boliviensis, Kataria anisodonta, Podocnemis ?brasiliensis, Roxochelys cf. vilavilensis, Sokotosuchus aff. ianwilsoni, Zulmasuchus, Aniliidae, Boidae, ?Madtsoiidae, Tropidophiidae, Gymnophiona
[6][7][8]
[9][10]
Fishes Andinichthys 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.
[6][7]

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. ^ a b c Gayet et al., 1991, p.403
  7. ^ a b c 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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