Upper Triassic Palaeobotany of Biobío river valley, Chile: Filicopsida Class.
Paleobotanica del Triasico Superior del valle del rio Biobio, Chile: Clase Filicopsida.
| dc.contributor | en-US | |
| dc.contributor | es-ES | |
| dc.creator | Leppe, Marcelo | |
| dc.creator | Moisan, Philippe | |
| dc.creator | Abad, Eduardo | |
| dc.creator | Palma-Heldt, Sylvia | |
| dc.date | 2010-06-30 | |
| dc.identifier | http://www.andeangeology.cl/index.php/revista1/article/view/V33n1-a04 | |
| dc.identifier | 10.5027/andgeoV33n1-a04 | |
| dc.description | The Upper Triassic (Carnian-Norian) Filicopsida fossils present in the marine and continental outcrops, informally nominated as Santa Juana formation in the Biobío Region of Chile (37ºS/73ºS), are described. The taphoflora includes ten species, out of which eight are first registers for this area: Gleichenites quilacoyensis Leppe and Moisan sp. nov., Asterotheca rigbyana rigbyana Herbst, Rienitsia colliveri Herbst, Dictyophyllum fuenzalidai Herbst, Dictyophyllum (Thaumatopteris) rothi Frenguelli, Chansitheca argentina Herbst, Cladophlebis kurtzi Frenguelli and Todites baldoni Herbst ; three are new records for the Chilean Upper Triassic: Rienitsia colliveri Herbst, Gleichenites quilacoyensis Leppe and Moisan sp. nov., and Chansitheca argentina Herbst. The fern species found represents an 18% of the total specific diversity of plants in the Upper Triassic rocks from Biobío and help to understand the complicate floristic evolution of the communities in Gondwana. The Triassic rocks from Biobío are situated in the context of the Southwestern Extratropical Gondwana. The assemblage was developed in a continental environment with strong marine influence, under a rainy seasonal weather and displays age affinities with the argentinian Florian stage (Norian-Rhaetian). On an evolutionary point of view, the paleoflora was involved into the long Triassic/Jurassic mass extinction process, that means the end of the 'Dicroidium Flora' and the start of several elements that will dominate during the Jurassic. | en-US |
| dc.description | Se describen restos fosiles de la Clase Filicopsida presentes en los estratos marinos y continentales del valle inferior del rio Biobio (37ºS/73ºW) denominados formacion Santa Juana y asignados al Triasico Superior (Carnico-Norico) de la Region del Biobio, Chile. La tafoflora incluye diez especies, de las cuales ocho son primeros registros para el Triasico de esta region: Gleichenites quilacoyensis Leppe y Moisan sp. nov., Asterotheca rigbyana rigbyana Herbst, Rienitsia colliveri Herbst, Dictyophyllum fuenzalidai Herbst, Dictyophyllum (Thaumatopteris) rothi Frenguelli, Chansitheca argentina Herbst, Cladophlebis kurtzi Frenguelli y Todites baldoni Herbst; tres son nuevos registros para Chile: Rienitsia colliveri Herbst, Gleichenites quilacoyensis Leppe y Moisan sp. nov. y Chansitheca argentina Herbst. Las especies de helechos encontrados representan el 18 % de la diversidad especifica total de plantas del Triasico del Biobio y ayudan a clarificar el complicado esquema de la evolucion floristica de las comunidades del Gondwana. Se situa al Triasico del Biobio en el contexto del Gondwana Extratropical Suroeste. Los conjuntos se desarrollaron en un ambiente continental de fuerte influencia marina, bajo un clima estacional lluvioso y con afinidad etanea con el estadio Floriano argentino (Norico-Retico). Desde un enfoque evolutivo, se enmarca dentro del largo proceso de extincion masiva Triasico/Jurasico, que significo el fin de la 'Flora de Dicroidium' y la aparicion de una serie de elementos que dominaran durante el Jurasico. | es-ES |
| dc.format | application/pdf | |
| dc.format | text/html | |
| dc.language | eng | |
| dc.publisher | Servicio Nacional de Geología y Minería | en-US |
| dc.relation | http://www.andeangeology.cl/index.php/revista1/article/view/V33n1-a04/746 | |
| dc.relation | http://www.andeangeology.cl/index.php/revista1/article/view/V33n1-a04/html | |
| dc.source | Andean Geology; Vol 33, No 1 (2006); 81-107 | es-ES |
| dc.source | Andean Geology; Vol 33, No 1 (2006); 81-107 | en-US |
| dc.source | 0718-7106 | |
| dc.source | 0718-7092 | |
| dc.title | Upper Triassic Palaeobotany of Biobío river valley, Chile: Filicopsida Class. | en-US |
| dc.title | Paleobotanica del Triasico Superior del valle del rio Biobio, Chile: Clase Filicopsida. | es-ES |
| dc.type | info:eu-repo/semantics/article | |
| dc.type | info:eu-repo/semantics/publishedVersion | |
| dc.type | es-ES | |
| dc.type | en-US |
This item appears in the following Collection(s)
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Andean Geology
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