Darriwilian Conodont Biostratigraphy of the Las Chacritas Formation, Central Precordillera (San Juan Province, Argentina)
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| Natura: | Artículo científico |
| Lingua: | en |
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Universitat de Barcelona
2005
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| author | S. Heredia |
| author_facet | S. Heredia |
| contents | Darriwilian Conodont Biostratigraphy of the Las Chacritas Formation, Central Precordillera (San Juan Province, Argentina) S. Heredia M. Beresi S. Peralta Ciencias de la Tierra Conodonts Argentina Biostratigraphy Central Precordillera The Las Chacritas Fm in the type section in the Sierra de La Trampa, Central Precordillera (San Juan Province)was deposited in an outer carbonate ramp setting that evolved from relatively deep to shallow water. Samplesfrom this well-exposed Middle Ordovician section yielded collections of low-diversity conodont faunas stratigraphicallysignificant. The top of the underlying San Juan Fm and the lower and middle parts of the Las ChacritasFm contain conodonts representative of the Lenodus variabilis Zone, and the upper part of the Las ChacritasFm yields conodonts that correlate with the Paroistodus horridus subzone of the upper part of theLenodus variabilis Zone. The occurrence of Dzikodus tablepointensis and Eoplacognathus pseudoplanus in theupper part of the Paroistodus horridus subzone is especially significant. The occurrence of Histiodella kristinaein the highest levels indicates that the top of the Las Chacritas Fm correlates with the Eoplacognathus suecicusZone. Conodont biofacies are analyzed trough the entire section, supporting an outer platform or open sea conditions.Baltic and Sino-Pacific affinities are stated. 2005 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50530407 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_50530407 |
| institution | Redalyc |
| language | en |
| publishDate | 2005 |
| publisher | Universitat de Barcelona |
| spellingShingle | Darriwilian Conodont Biostratigraphy of the Las Chacritas Formation, Central Precordillera (San Juan Province, Argentina) S. Heredia Ciencias de la Tierra Conodonts Argentina Biostratigraphy Central Precordillera Darriwilian Conodont Biostratigraphy of the Las Chacritas Formation, Central Precordillera (San Juan Province, Argentina) S. Heredia M. Beresi S. Peralta Ciencias de la Tierra Conodonts Argentina Biostratigraphy Central Precordillera The Las Chacritas Fm in the type section in the Sierra de La Trampa, Central Precordillera (San Juan Province)was deposited in an outer carbonate ramp setting that evolved from relatively deep to shallow water. Samplesfrom this well-exposed Middle Ordovician section yielded collections of low-diversity conodont faunas stratigraphicallysignificant. The top of the underlying San Juan Fm and the lower and middle parts of the Las ChacritasFm contain conodonts representative of the Lenodus variabilis Zone, and the upper part of the Las ChacritasFm yields conodonts that correlate with the Paroistodus horridus subzone of the upper part of theLenodus variabilis Zone. The occurrence of Dzikodus tablepointensis and Eoplacognathus pseudoplanus in theupper part of the Paroistodus horridus subzone is especially significant. The occurrence of Histiodella kristinaein the highest levels indicates that the top of the Las Chacritas Fm correlates with the Eoplacognathus suecicusZone. Conodont biofacies are analyzed trough the entire section, supporting an outer platform or open sea conditions.Baltic and Sino-Pacific affinities are stated. 2005 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50530407 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 | Darriwilian Conodont Biostratigraphy of the Las Chacritas Formation, Central Precordillera (San Juan Province, Argentina) |
| topic | Ciencias de la Tierra Conodonts Argentina Biostratigraphy Central Precordillera |
| url | https://www.redalyc.org/articulo.oa?id=50530407 |