Earth:Anfiteatro de Ticó formation

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Anfiteatro de Ticó Formation
Stratigraphic range: Aptian
~119–116 Ma
TypeGeological formation
Unit ofBaqueró Group
UnderliesBajo Tigre Formation
Lithology
PrimarySandstone, siltstone
OtherConglomerate
Location
Coordinates [ ⚑ ] : 48°30′S 69°12′W / 48.5°S 69.2°W / -48.5; -69.2
Paleocoordinates [ ⚑ ] 49°24′S 35°24′W / 49.4°S 35.4°W / -49.4; -35.4
RegionSanta Cruz
Country Argentina
ExtentDeseado Massif
Type section
Named forAnfiteatro de Ticó, Santa Cruz, Argentina
Named bySergio Archangelsky
Anfiteatro de Ticó formation is located in Argentina
Anfiteatro de Ticó formation
Anfiteatro de Ticó formation (Argentina)

The Anfiteatro de Ticó Formation is a geological formation from the Deseado Massif in the province of Santa Cruz, Argentina .

Paleobiology

The Anfiteatro de Ticó preserves a rich and diverse flora including macrofossils, mesofossils, and microfossils. These have been object of detailed investigations since the 1960'.[1][2][3]

Depositional environments

The formation is of continental origin, and includes riparian and lacustrine deposits.

Fossil content

The following fossils were reported from the formation:[4]

Flora

Bryophytes
  • Ricciopsis grandensis
Horsetails
Ferns


Conifers
  • Alkastrobus peltatus
  • Apterocladus lanceolatus
  • Morenostrobus fertilis
  • Podocarpus dubius
  • Squamastrobus tigrensis
  • Tarphyderma glabra
  • Tomaxellia degiustoi
  • Tomaxellia biforme
  • Trisacocladus tigrensis


Ginkgoales


Cycadales


Caytoniales


References

  1. Archangelsky, Sergio (1963). "A new Mesozoic flora from Ticó, Santa Cruz Province, Argentina.". Bulletin of the British Museum (Natural History), Geology 8: 45–62. 
  2. Llorens, M.; Loinaze, V.S. Perez; Passalia, M.G.; Vera, E.I. (February 2020). "Palynological, megafloral and mesofossil record from the Bajo Grande area (Anfiteatro de Ticó Formation, Baqueró Group, Upper Aptian), Patagonia, Argentina". Review of Palaeobotany and Palynology 273: 104137. doi:10.1016/j.revpalbo.2019.104137. ISSN 0034-6667. http://dx.doi.org/10.1016/j.revpalbo.2019.104137. 
  3. Perez Loinaze, Valeria S.; Vera, Ezequiel I.; Passalia, Mauro G.; Llorens, Magdalena; Friedman, Richard; Limarino, Carlos O.; Césari, Silvia N. (December 2013). "High-precision U–Pb zircon age from the Anfiteatro de Ticó Formation: Implications for the timing of the early angiosperm diversification in Patagonia". Journal of South American Earth Sciences 48: 97–105. doi:10.1016/j.jsames.2013.08.005. ISSN 0895-9811. http://dx.doi.org/10.1016/j.jsames.2013.08.005. 
  4. Anfiteatro de Ticó Formation at Fossilworks.org