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El Molino Formation

For other uses, see Molino Formation.
El Molino Formation
Stratigraphic range: Maastrichtian
~70–66 Ma
↓
TypeGeological formation
Unit ofPuca Group
UnderliesSanta Lucía Formation
OverliesChaunaca Formation
Lithology
PrimarySandstone
OtherLimestone
Location
Coordinates19°30′S 65°48′W / 19.5°S 65.8°W / -19.5; -65.8
Approximate paleocoordinates22°00′S 51°48′W / 22.0°S 51.8°W / -22.0; -51.8
RegionCochabamba, Chuquisaca & Potosí Departments
Country Bolivia
ExtentAltiplano & Potosí Basins
El Molino Formation is located in Bolivia
El Molino Formation
El Molino Formation
El Molino Formation
El Molino Formation (Bolivia)

The El Molino Formation is a Maastrichtian geologic formation pertaining to the Puca Group of central Bolivia. The formation comprises fine-grained sandstones and sandy limestones with stromatolites deposited in a shallow marine to lacustrine environment. The formation has provided fossils of Dolichochampsa minima,[1] and ichnofossils of Ankylosauria indet., Ornithopoda indet., Theropoda indet. and Titanosauridae indet.[2][3][4] The tracksite of Cal Orcko is the best known example of the ichnofossil locations of the formation. The ichnofossil of Ligabueichnum bolivianum may be attributed to an ankylosaur.[5] The fossil fish species Dasyatis molinoensis is named after the formation.

Fossil content

Other fossils retrieved from the formation are:[6]

See also

References

  1. ^ Buffetaut, 1987
  2. ^ Lockley et al., 2002, p.389
  3. ^ La Palca village at Fossilworks.org
  4. ^ Cal Orcko tracksite at Fossilworks.org
  5. ^ a b Leonardi, 1994, p.39
  6. ^ Pajcha Pata[dead link‍] at Fossilworks.org
  7. ^ Leonardi, 1994, p.40

Bibliography

  • Buffetaut, É (1987), "Occurrence of the crocodilian Dolichochampsa minima (Eusuchia, Dolichochampsidae) in the El Molino Formation of Bolivia", Bulletin de la Société Belge de Géologie, 96 (2): 195–199
  • Leonardi, Giuseppe (1994), Annotated Atlas of South America Tetrapod Footprints (Devonian to Holocene) with an appendix on Mexico and Central America, Ministerio de Minas e Energia - Companhia de Pesquisa de Recursos Minerais, Geological Service of Brazil, pp. 1–248, retrieved 2019-03-25
  • Lockley, M.G.; Schulp, A.S.; Meyer, C.A.; Leonardi, G.; Mamani, D.K. (2002), "Titanosaurid trackways from the Upper Cretaceous of Bolivia: evidence for large manus, wide-gauge locomotion and gregarious behaviour", Cretaceous Research, 23 (3): 383–400, Bibcode:2002CrRes..23..383L, doi:10.1006/cres.2002.1006, retrieved 2019-03-03
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