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| Natura: | Artículo científico |
| Lingua: | en |
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Universitat de Barcelona
2005
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| Accesso online: | https://www.redalyc.org/articulo.oa?id=50530405 |
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| _version_ | 1866585718357229568 |
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| author | G. Ortega |
| author_facet | G. Ortega |
| contents | Tremadocian Graptolite-Conodont Biostratigraphy of the South American Gondwana margin (Eastern Cordillera, NW Argentina) G. Ortega G.L. Albanesi Ciencias de la Tierra Conodonts Argentina Graptolites Tremadocian Biostratigraphy The Tremadocian graptolite and conodont faunas of the Gondwana Margin recorded at the Eastern Cordillera(EC) of Salta and Jujuy provinces (northwestern Argentina) are studied. The previous data and the new providedinformation indicate that a no nominated interval and several graptolite zones (Anisograptus matanensis,Rhabdinopora flabelliformis anglica, Bryograptus, Kiaerograptus, Kiaerograptus supremus, Araneograptusmurrayi, and Hunnegraptus copiosus zones), as well as several conodont zones (Iapetognathus, Cordylodusangulatus, Paltodus deltifer, and Acodus deltatus - Paroistodus proteus zones) occur in the Ordovician successionsstudied. New or reappraised data from sections such as Angosto del Moreno, Angosto de Lampazar, Parcha-Incamayo-Incahuasi area, and Cajas range (EC western margin), and Alfarcito area and Mojotoro range(EC eastern margin), provide new information on the composition of the fossil faunas. A composite graptoliteconodontbiostratigraphic framework, including records of key trilobites as external control group, is proposedfor the Tremadocian of the South American margin of Gondwana. Both fossil groups are generally recordedfrom outer platform to ocean basin environments, showing significant similarities with the Baltoscandian faunas.Nevertheless, particular shallow-water facies include either specific forms or species associations that arecommon to the epeiric shallow-water seas of Laurentia. This fact demonstrates an important interplay betweenfaunas of different regions of the Iapetus Ocean during the Tremadocian. 2005 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50530405 en http://www.redalyc.org/revista.oa?id=505 Geologica Acta: an international earth science journal application/pdf Universitat de Barcelona Geologica Acta: an international earth science journal (España) Num.4 Vol.3 |
| format | Artículo científico |
| id | redalyc_50530405 |
| language | en |
| publishDate | 2005 |
| publisher | Universitat de Barcelona |
| spellingShingle | Tremadocian Graptolite-Conodont Biostratigraphy of the South American Gondwana margin (Eastern Cordillera, NW Argentina) G. Ortega Ciencias de la Tierra Conodonts Argentina Graptolites Tremadocian Biostratigraphy Tremadocian Graptolite-Conodont Biostratigraphy of the South American Gondwana margin (Eastern Cordillera, NW Argentina) G. Ortega G.L. Albanesi Ciencias de la Tierra Conodonts Argentina Graptolites Tremadocian Biostratigraphy The Tremadocian graptolite and conodont faunas of the Gondwana Margin recorded at the Eastern Cordillera(EC) of Salta and Jujuy provinces (northwestern Argentina) are studied. The previous data and the new providedinformation indicate that a no nominated interval and several graptolite zones (Anisograptus matanensis,Rhabdinopora flabelliformis anglica, Bryograptus, Kiaerograptus, Kiaerograptus supremus, Araneograptusmurrayi, and Hunnegraptus copiosus zones), as well as several conodont zones (Iapetognathus, Cordylodusangulatus, Paltodus deltifer, and Acodus deltatus - Paroistodus proteus zones) occur in the Ordovician successionsstudied. New or reappraised data from sections such as Angosto del Moreno, Angosto de Lampazar, Parcha-Incamayo-Incahuasi area, and Cajas range (EC western margin), and Alfarcito area and Mojotoro range(EC eastern margin), provide new information on the composition of the fossil faunas. A composite graptoliteconodontbiostratigraphic framework, including records of key trilobites as external control group, is proposedfor the Tremadocian of the South American margin of Gondwana. Both fossil groups are generally recordedfrom outer platform to ocean basin environments, showing significant similarities with the Baltoscandian faunas.Nevertheless, particular shallow-water facies include either specific forms or species associations that arecommon to the epeiric shallow-water seas of Laurentia. This fact demonstrates an important interplay betweenfaunas of different regions of the Iapetus Ocean during the Tremadocian. 2005 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50530405 en http://www.redalyc.org/revista.oa?id=505 Geologica Acta: an international earth science journal application/pdf Universitat de Barcelona Geologica Acta: an international earth science journal (España) Num.4 Vol.3 |
| title | Tremadocian Graptolite-Conodont Biostratigraphy of the South American Gondwana margin (Eastern Cordillera, NW Argentina) |
| topic | Ciencias de la Tierra Conodonts Argentina Graptolites Tremadocian Biostratigraphy |
| url | https://www.redalyc.org/articulo.oa?id=50530405 |