Santa Lucía Formation




























Santa Lucía Formation
Stratigraphic range: Maastrichtian-Paleocene (typically Tiupampan)
~67–62 Ma

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TypeGeological formation
Unit ofPotosí Basin
UnderliesCayara Formation
OverliesEl Molino Formation
Thickness381.35 m (1,251.1 ft)
Lithology
Primary
Shale, marl
OtherSiltstone
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
RegionCochabamba
Country
 Bolivia
Type section
Location
Tiupampa, 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

Blakey 065Ma - COL.jpg
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.




Contents





  • 1 Description


  • 2 Paleontological significance

    • 2.1 Fossil content



  • 3 See also


  • 4 References

    • 4.1 Bibliography





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]



Paleontological significance


The oldest known "condylarth" fauna of the Tertiary of South America comes from basal Paleocene strata of the Santa Lucía Formation at Tiupampa. It includes five genera and seven species: Molinodus suarez, Tiuclaenus minutus, T. cotasi, T. robustus, Pucanodus gagnieri, Andinodus boliviensis, and Simoclaenus sylvaticus.[6] Because of its unique fauna, the Santa Lucía Formation at Tiupampa has been chosen as the earliest South American land mammal age giving rise to the Tiupampan.



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.


[7][8]

Reptiles & amphibians
Coniophis sp., Cynodontosuchus cf. rothi, Estesiella boliviensis, Kataria anisodonta, Lapparentemys vilavilensis, Podocnemis ?brasiliensis, Roxochelys cf. vilavilensis, Sebecus querejazus, Sokotosuchus aff. ianwilsoni, Zulmasuchus, Aniliidae, Boidae, ?Madtsoiidae, Tropidophiidae, Gymnophiona


[7][8][9]
[10][11]
[12]

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.


[7][8]


See also




  • List of dinosaur-bearing rock formations

    • List of stratigraphic units with ornithischian tracks
      • Ornithopod tracks


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. ^ De Muizon & Cifelli, 2000, p.47


  7. ^ abc Gayet et al., 1991, p.403


  8. ^ abc Tiupampa 1 at Fossilworks.org


  9. ^ Buffetaut & Marshall, 1991


  10. ^ Rage, 1991a, pp.499-501


  11. ^ Rage, 1991b, pp.503-508


  12. ^ Vila Vila at Fossilworks.org



Bibliography



  • Buffetaut, É., and L.G. Marshall. 1991. A new crocodilian, Sebecus querejazus, nov. sp. (Mesosuchia, Sebecidae) from the Santa Lucía Formation (Early Paleocene) at Vila Vila, Southern Bolivia, 545–557. Revista Técnica de YPFB.


  • Gaffney, Eugene S.; Peter A. Meylan; Roger C. Wood; Elwyn Simons, and Diogenes De Almeida Campos. 2011. Evolution of the side-necked turtles: the family Podocnemididae. AMNH Bulletin 350. 1–237. Accessed 2017-08-15.


  • Gayet, Mireille; Larry G. Marshall, and Thierry Sempere. 1991. The Mesozoic and Paleocene vertebrates of Bolivia and their stratigraphic context: a review. Revista técnica de YPFB 12. 393-433. Accessed 2017-08-15.


  • Jiménez, Grisel. 2012. Estratigrafía, facies y ambientes evolutivos de depósito del Paleógeno Inferior: Formación Santa Lucía (Sinclinal de Miraflores - Sección Cayara, Potosí), 1-23. .. Accessed 2017-08-15.


  • De Muizon, C., and R.L. Cifelli. 2000. The "condylarths" (archaic Ungulata, Mammalia) from the early Palaeocene of Tiupampa (Bolivia): implications on the origin of the South American ungulates, 47–150. 22; Accessed 2019-02-08.


  • Rage, J.C.. 1991a. Gymnophionan Amphibia from the early Paleocene (Santa Lucía Formation) of Tiupampa (Bolivia). The oldest known Gymnophiona. Revista técnica de YPFB 12. 499-501. Accessed 2017-08-15.


  • Rage, J.C.. 1991b. Squamate Reptiles from the early Paleocene of Tiupampa area (Santa Lucía Formation), Bolivia. Revista técnica de YPFB 12. 503-508. Accessed 2017-08-15.


  • Renner, Sven, and Carlos Velasco. 2000. Geología e hidrogeología del Valle Central de Cochabamba. Boletín del Servicio Nacional de Geología y Minería 34. 1-113. Accessed 2017-08-15.


  • Sempere, Thierry; R.F. Butler; D.R. Richards; L.G. Marshall; W. Sharp, and C.C. Swisher. 1997. Stratigraphy and chronology of Upper Cretaceous-lower Paleogene strata in Bolivia and northwest Argentina. GSA Bulletin 109. 709-727. Accessed 2017-08-15.


  • Weishampel, David B.; Peter Dodson, and Halszka Osmólska. 1991. The Dinosauria, 1-861. Berkeley: University of California Press.








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