Anfiteatro de Ticó formation

Anfiteatro de Ticó Formation
Stratigraphic range: Aptian
~119–116 Ma

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Anfiteatro de Ticó Formation; Stratigraphic range: Aptian; ~119–116 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Geological formation
Unit of	Baqueró Group
Underlies	Bajo Tigre Formation
Lithology
Primary	sandstone, Siltstone
Other	Conglomerate
Location
Coordinates	48.5°S 69.2°W
Approximate paleocoordinates	49.4°S 35.4°W
Region	Santa Cruz
Country	Argentina
Extent	Deseado Massif Basin
Type section
Named for	Anfiteatro de Ticó, Santa Cruz, Argentina
Named by	Sergio Archangelsky
	Anfiteatro de Ticó formation (Argentina)

The Anfiteatro de Ticó is a geological formation from the Deseado Massif Basin 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]

Depositional environments

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

Paleobiota

Bryophytes

Ricciopsis grandensis

Horsetails

Equisetites pusillus

Ferns

Cladophlebis tripinnata
Cladophlebis antarctica
Cyathea cyathifolia
Baqueroites padulae
Adiantopteris tripinnata
Korallipteris vegagrandis

Conifers

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

Ginkgoales

Ginkgoites tigrensis
Ginkgoites ticoensis
Allicospermum patagonicum
Karkenia incurva

Cycadales

Restrepophyllum chiguoides
Eobowenia incrassata
Sueria rectivervis
Mesosigneria coriacea
Mesosigneria oblonga
Ticoa harrisii
Ticoa lanceolata
Ticoa magnipinnulata
Pseudoctenis crassa
Pseudoctenis dentata

References

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. hdl:11336/106118. ISSN 0034-6667.
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.

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[1] 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. hdl:11336/106118. ISSN 0034-6667.

[2] 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.