The Anfiteatro de Ticó Formation is a geological formation from the Deseado Massif in the province of Santa Cruz, Argentina.
| Anfiteatro de Ticó Formation | |
|---|---|
| Stratigraphic range: Aptian ~ | |
| Type | Geological formation |
| Unit of | Baqueró Group |
| Underlies | Bajo Tigre Formation |
| Lithology | |
| Primary | Sandstone, siltstone |
| Other | Conglomerate |
| Location | |
| Coordinates | 48°30′S 69°12′W / 48.5°S 69.2°W |
| Approximate paleocoordinates | 49°24′S 35°24′W / 49.4°S 35.4°W |
| Region | Santa Cruz |
| Country | Argentina |
| Extent | Deseado Massif |
| Type section | |
| Named for | Anfiteatro de Ticó, Santa Cruz, Argentina |
| Named by | Sergio Archangelsky |
  Anfiteatro de Ticó Formation (Argentina) | |
Paleobiology
editThe 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
editThe formation is of continental origin, and includes riparian and lacustrine deposits.
Fossil content
editThe following fossils were reported from the formation:[4]
Flora
edit- Ricciopsis grandensis
- Equisetites pusillus
- Cladophlebis tripinnata
- Cladophlebis antarctica
- Cyathea cyathifolia
- Baqueroites padulae
- Adiantopteris tripinnata
- Korallipteris vegagrandis
- Alkastrobus peltatus
- Apterocladus lanceolatus
- Morenostrobus fertilis
- Podocarpus dubius
- Squamastrobus tigrensis
- Tarphyderma glabra
- Tomaxellia degiustoi
- Tomaxellia biforme
- Trisacocladus tigrensis
- Ginkgoites tigrensis
- Ginkgoites ticoensis
- Allicospermum patagonicum
- Karkenia incurva
- Restrepophyllum chiguoides
- Eobowenia incrassata
- Sueria rectivervis
- Mesosingeria coriacea
- Mesosingeria oblonga
- Ticoa harrisii
- Ticoa lanceolata
- Ticoa magnipinnulata
- Pseudoctenis crassa
- Pseudoctenis dentata
- Ruflorinia sierra
- Ruflorinia pilifera
- Ruflorinia papillosa
- Ktalenia circularis
References
edit- ^ Archangelsky, Sergio (1963). "A new Mesozoic flora from Ticó, Santa Cruz Province, Argentina". Bulletin of the British Museum (Natural History), Geology. 8 (2): 45–62. doi:10.5962/p.313876.
- ^ 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. hdl:11336/5366. ISSN 0895-9811.
- ^ Anfiteatro de Ticó Formation at Fossilworks.org