Enviar este artículo por correo electrónico New paleobotanical data from the Puntudo Chico Formation (uppermost Cretaceous), Chubut Province, Argentina
Resumen
The Puntudo Chico Formation is a continental unit cropping out in central and northern region of the Chubut Province in Argentina. It is one of the units that overlays the Chubut Group and its age is currently regarded as Campanian to lower Maastrichtian. The previously reported paleontological content of this unit essentially consist of silicified conifer trunks of Podocarpoxylon mazzonii, Agathoxylon antarcticum and Brachyoxylon sp. cf. B. currumilii (reported from El Quiosco locality), and palms and the dicot Aextoxicoxylon kawasianum identified at Estancia María de las Nieves locality. In this contribution, new conifer woods are reported from the latter locality. Podocarpoxylon mazzonii is identified as the most abundant taxon in this locality, as in El Quiosco. A second taxon is Cupressinoxylon austrocedroides Nishida, representing the first record of the genus for the unit. Finally, a third wood type is recognized, which can be separated from the other two taxa here identified, but given its deficient preservation remains with unclear taxonomic placement. The shared presence of P. mazzonii and C. austrocedroides in the Puntudo Chico Formation and in a Danian unit cropping out in the region (i.e., the Salamanca Formation) is discussed.
Palabras clave
Texto completo:
PDF (English)Referencias
Anselmi, G., M.T. Gamba & J.L. Panza. 2004. Hoja geológica 4369-IV, Los Altares. Provincia del Chubut. Instituto de Geología y Recursos Minerales. Servicio Geologico Minero Argentino, Boletín 313: 1-98.
Ardolino, A., M. Franchi, C. Hermann & R. Viera. 1996. Hoja Geológica 4366-1 Telsen. Provincia del Chubut. Servicio Geológico Minero Argentino, Boletín 215: 1-110.
Boura, A., M. Bamford & M. Philippe. 2021. Promoting a standardized description of fossil tracheidoxyls. Review of Palaeobotany and Palynology 295: 104525
Brea, M., S.D. Matheos, M.S. Raigemborn, A. Iglesias, A.F. Zucol & M. Prámparo. 2011. Paleoecology and paleoenvironments of Podocarp trees in the Ameghino Petrified forest (Golfo San Jorge Basin, Patagonia, Argentina): Constraints for early Paleogene paleoclimate. Geologica Acta 9: 13-28.
Clyde, W.C., J.M Krause, F. De Benedetti, J. Ramezani, N.R. Cúneo, M.A. Gandolfo, P. Haber, C. Whelan & T. Smith. 2021. New South American record of the Cretaceous–Paleogene boundary interval (La Colonia Formation, Patagonia, Argentina). Cretaceous Research 126: 104889.
Del Fueyo, G.M. 1998. Coniferous woods from the Upper Cretaceous of Patagonia, Argentina. Revista Española de Paleontología 13: 43-50
Lapido, O. & R. Page. 1979. Relaciones estratigráficas y estructura del Bajo de la Tierra Colorada (Provincia del Chubut). VII Congreso Geológico Argentino, Neuquén, Argentina, Actas 1: 299-313.
Llorens, M. & Perez Pincheira, E. 2019. Nueva asociación palinológica maastrichtiana en la Cuenca Cañadón Asfalto, Provincia de Chubut, Argentina. XII Congreso de la Asociación Paleontológica Argentina, Libro de Resúmenes: 89-90.
Nishida, M. 1984. The anatomy and affinities of the petrified plants from the Tertiary of Chile. I. In: M. Nishida (Ed.), Contributions to the Botany in the Andes, pp. 81-85. Academia Scientific Book Inc, Tokyo, Japan.
Nuñez Otaño, N., E. Perez Pincheira & M. Llorens. 2022. Testing deep-time fungi and algae as proxies in palaeoecological analysis: A case study of a Maastrichtian flora from Patagonia, Argentina. Abstracts Book of 54th Annual meeting of the AASP-TPS: 41-42.
Page, R.F.N. 1987. Descripción Geológica de la Hoja 43g “Bajo de la Tierra Colorada”. Provincia del Chubut. Dirección Nacional de Minería y Geología, Boletín 200. 1–77.
Panza, J.L., L.E. Sacomani & R. Giacosa. 2018. Hoja Geológica 4972-II, Lago Cardiel, Provincia de Santa Cruz. Instituto de Geología y Recursos Minerales, Servicio Geológico Minero Argentino. Boletín 431: 1-149.
Passalia, M.G., A. Garrido, A. Iglesias & E.I. Vera. 2023. The Valcheta Petrified Forest (Upper Cretaceous), northern Patagonia, Argentina: A geological and paleobotanical survey. Cretaceous Research 142: 105395.
Pesce, A. 1979. Estratigrafía del Arroyo Perdido en su tramo medio e inferior, Provincia del Chubut. VII Congreso Geológico Argentino, Neuquén, Argentina, Actas 1: 315-333
Petriella, B. 1972. Estudio de maderas petrificadas del Terciario inferior del área central de Chubut (Cerro Bororó). Revista del Museo de La Plata 6: 159-254.
Philippe, M. & M.K. Bamford. 2008. A key to morphogenera used for Mesozoic conifer-like woods. Review of Palaeobotany and Palynology 148: 184–207.
Pujana, R.R. & D.P. Ruiz. 2017. Podocarpoxylon Gothan reviewed in the light of a new species from the Eocene of Patagonia. IAWA Journal 38: 220-244.
Pujana, R.R., D.P. Ruiz, L.C.A. Martínez & Y. Zhang. 2016. Proposals for quantifying two characteristics of tracheid pit arrangement in gymnosperm woods. Revista del Museo Argentino de Ciencias Naturales, Nueva Serie 18: 117-124.
Pujana, R.R., S.N. Santillana & S.A. Marenssi. 2014. Conifer fossil woods from the La Meseta Formation (Eocene of Western Antarctica): Evidence of Podocarpaceae-dominated forests. Review of Palaeobotany and Palynology 200: 199-204.
Raigemborn, M.S., M. Brea, A. Zucol & S. Matheos. 2009. Early Paleogene climate at mid latitude in South America: Mineralogical and paleobotanical proxies from continental sequences in Golfo San Jorge basin (Patagonia, Argentina). Geologica Acta 7: 125-145.
Richter, H.G., D. Grosser, I. Heinz & P.E. Gasson. 2004. IAWA List of microscopic features for softwood identification. IAWA Journal 25: 1-70.
Rombola, C.F., C.D. Greppi, R.R. Pujana, J.L. García Massini, E.S. Bellosi & S.A. Marenssi. 2022. Brachyoxylon fossil woods with traumatic resin canals from the Upper Cretaceous Cerro Fortaleza Formation, southern Patagonia (Santa Cruz Province, Argentina). Cretaceous Research 130: 105065.
Rómbola, C.F., R.R. Pujana & D.P. Ruiz. 2021. Maderas fósiles de la Formación Cardiel (Cretácico Medio), provincia de Santa Cruz, Argentina. 12° Congreso Argentino de Paleontología, Buenos Aires, Argentina, Resúmenes: 101.
Ruiz, D.P., M. Brea, M.S. Raigemborn & S.D. Matheos. 2017. Conifer woods from the Salamanca Formation (early Paleocene), Central Patagonia, Argentina: Paleoenvironmental implications. Journal of South American Earth Sciences 76: 427-445.
Ruiz, D.P., M.S. Raigemborn, M. Brea & R.R. Pujana. 2020. Paleocene Las Violetas Fossil Forest: Wood anatomy and paleoclimatology. Journal of South American Earth Sciences 98: 102414.
Silva Nieto, D.G., A. Lizuain & M.Páez. 2020. Hoja Geológica 4369-30 Bajo Chiquichan, Provincia del Chubut. Servicio Geológico Minero Argentino. Instituto de Geología y Recursos Minerales. Boletín 421: 1-46.
Vasquez Correa, Á.M., E.A. Vara & M.Á.H. Machuca. 2010. Wood anatomy of Colombian Podocarpaceae (Podocarpus, Prumnopitys and Retrophyllum). Botanical Journal of the Linnean Society 164: 293-302.
Vera, E.I., V.S. Perez Loinaze, M. Llorens, M.G. Passalía & C. Bau. 2017. Sobre la presencia de Palmoxylon en la Formación Puntudo Chico (Campaniano-Maastrichtiano). Reunión de Comunicaciones de La Asociación Paleontológica Argentina, San Luis, Libro de Resúmenes: R56.
Vera, E.I., V.S. Perez Loinaze, M. Llorens, M. Páez & M.G. Passalia. 2019. Fossil woods with coniferalean affinities from the Upper Cretaceous (Campanian–Maastrichtian) Puntudo Chico Formation, Chubut Province, Argentina. Cretaceous Research 99: 321-333.
Vera, E.I., V.S. Perez Loinaze, M. Llorens & M.G. Passalia. 2020. The fossil genus Aextoxicoxylon (Magnoliopsida) in the Upper Cretaceous Puntudo Chico Formation, Chubut Province, Argentina. Cretaceous Research 107: 104315.
Enlaces refback
- No hay ningún enlace refback.
This work is licensed under a Creative Commons Attribution 3.0 License.