Huitrera Formation
Geological formation in Argentina
The Huitrera Formation is a geological formation in the Neuquén Basin in northern Patagonian Argentina whose strata date back to the Early Eocene of the Paleogene , or Casamayoran in the South American land mammal age classification.
The formation is together with the Reyhuau basalts part of the Pilcaniyeu Belt , a volcanic belt active in Paleocene to middle Eocene times.[1]
Description
The Huitrera Formation was first defined by Ravazzoli and Sesana in 1977. The name has been used to identify various volcaniclastic sequences, among others in the Ñirihuau fold-and-thrust belt .[2] The up to 1,300 metres (4,300 ft) thick formation comprises mudstones and sandstones deposited in a crater lake environment . Part of the formation comprises andesites , dacitic and rhyolitic ignimbrites , volcanic breccias , tuffs and trachybasalts .[3]
The formation was initially described as Late Eocene to Early Oligocene , but was later dated to 54.24 ± 0.45 Ma, meaning the Huitrera Formation is Ypresian , or in the SALMA classification , Casamayoran in age.
Fossil content
The following macrofossils were reported from the formation:[4]
The formation has also provided many pollen , analyzed in 2003 by Melendi et al.[12]
See also
References
^ Fernández Paz et al., 2020
^ Escosteguy & Franchi, 2010, p.420
^ Prez & Massafero, 2013, p.228
^ Huitrera Formation at Fossilworks .org
^ Degrange, F. J.; Pol, D.; Puerta, P.; Wilf, P. (2021). "Unexpected larger distribution of Paleogene stem-rollers (Aves, Coracii): new evidence from the Eocene of Patagonia, Argentina" . Scientific Reports . 11 (1): Article number 1363. Bibcode :2021NatSR..11.1363D . doi :10.1038/s41598-020-80479-8 . PMC 7809110 . PMID 33446824 .
^ Báez & Pugener, 2003
^ Aranciaga et al., 2019
^ Jin et al., 2020
^ Ramírez et al., 2016
^ Jud et al., 2018
^ Barrera et al., 2012
^ Melendi et al., 2003
Bibliography
Fernández Paz, Lucía; Iannelli, Sofía B.; Echaurren, Andrés; Ramos, Miguel; Bechis, Florencia; Litvak, Vanesa D.; Encinas, Alfonso; Kasemann, Simone; Lucassen, Friedrich; Folguera, Andrés (2020). "The late Eocene–early Miocene El Maitén Belt evolution: Magmatic response to the changing subduction zone geodynamics" (PDF) . Journal of South American Earth Sciences . 103 . Bibcode :2020JSAES.10302713F . doi :10.1016/j.jsames.2020.102713 .
Jin, Mengjie; Andreas Zwick; Adam Ślipiński; John W. M. Marris; Michael C. Thomas, and Hong Pang. 2020. A comprehensive phylogeny of flat bark beetles (Coleoptera: Cucujidae) with a revised classification and a new South American genus. Systematic Entomology 45(2). 248–268. . doi :10.1111/syen.12392
Aranciaga Rolando, Alexis M.; Federico L. Agnolin, and Julián Corsolini. 2019. A new pipoid frog (Anura, Pipimorpha) from the Paleogene of Patagonia. Paleobiogeographical implications . Comptes Rendus Palevol 18(7). 725–734. . doi :10.1016/j.crpv.2019.04.003
Jud, Nathan A.; Ari Iglesias; Peter Wilf, and Maria A. Gandolfo. 2018. Fossil moonseeds from the Paleogene of West Gondwana (Patagonia, Argentina). American Journal of Botany 105(5). 927–942. . doi :10.1002/ajb2.1092 PMID 29882954
Ramírez, Leonardo C.; Juan Corsolini, and Osvaldo Di Iorio. 2016. First fossil record of parasitic flat-bark beetle (Coleoptera: Passandridae) from the Eocene of Patagonia, Argentina. Ameghiniana 53(2). 160–169. . doi :10.5710/AMGH.29.11.2015.2920
Prez, Horacio, and Gabriela Massaferro. 2013. Geología y geomorfología del tramo superior del Arroyo Comallo, Río Negro . Contribuciones Científicas GÆA 26. 221–234. Accessed 2020-06-13.
Barreda, V.D.; L. Palazzesi; L. Katinas; J.V. Criscri; M.C. Telleria; K. Bremer; M.G. Passala; F. Bechis, and R. Corsolini. 2012. An extinct Eocene taxon of the daisy family (Asteraceae): evolutionary, ecological and biogeographical implications. Annals of Botany 109. 127-134. .
Escosteguy, Leonardo, and Mario Franchi. 2010. Estratigrafía de la región de Chapelco, Provincia del Neuquén . Revista de la Asociación Geológica Argentina 66. 418–429. Accessed 2020-06-13.
Báez, Ana M., and L. Analia Pugener. 2003. Ontogeny of a new Palaeogene pipid frog from southern South America and xenopodinomorph evolution. Zoological Journal of the Linnean Society 139(3). 439–476. . doi :10.1046/j.1096-3642.2003.00085.x
Melendi, D.L.; L.H. Scafati, and W. Volkheimer. 2003. Palynostratigraphy of the Paleogene Huitrera Formation in N-W Patagonia, Argentina. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen 228. 205-273. .