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.

Other fossils retrieved from the formation are:^[6]

• List of fossiliferous stratigraphic units in Bolivia
• List of stratigraphic units with dinosaur tracks
  • List of stratigraphic units with theropod tracks
• Cajones Formation
• Chaunaca Formation
• La Puerta Formation
• Toro Toro Formation

• 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