The Lower Cretaceous Chañarcillo and Neuquén Andean basins: Ammonoid biostratigraphy and correlations
The Chañarcillo and Neuquén basins of the Central Andes shared a common geological history in the earlier part of the Early Cretaceous but from Barremian times onward their evolution began to diverge, probably due to an increasing activity of an intervening volcanic arc. The Berriasian to Lower Barr...
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00721050_v42_n2_p143_AguirreUrreta http://hdl.handle.net/20.500.12110/paper_00721050_v42_n2_p143_AguirreUrreta |
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paper:paper_00721050_v42_n2_p143_AguirreUrreta2023-06-08T15:06:24Z The Lower Cretaceous Chañarcillo and Neuquén Andean basins: Ammonoid biostratigraphy and correlations Aguirre-Urreta, Maria Beatriz Ammonites Biostratigraphy Chañarcillo Basin Correlations Lower Cretaceous Neuquén Basin South America ammonite biostratigraphy correlation Cretaceous divergence fauna fossil assemblage island arc sequence boundary sequence stratigraphy Andes Argentina Atacama Chanarcillo Chile Neuquen Basin South America Ammonoidea The Chañarcillo and Neuquén basins of the Central Andes shared a common geological history in the earlier part of the Early Cretaceous but from Barremian times onward their evolution began to diverge, probably due to an increasing activity of an intervening volcanic arc. The Berriasian to Lower Barremian sequences were mainly marine and include rich ammonoid faunas, with many taxa in common to both the basins. They include both Andean and near-pandemic forms, the latter providing some good correlation levels with the 'standard' Mediterranean sequence. Marine conditions persisted in the Chañarcillo Basin till Early Albian times; the associated ammonoid faunas include pandemic, Pacific and Antarctic genera. In contrast, in the Neuquén Basin evaporites and continental clastics of the Huitrín Formation mark the beginning of a long disconnection with the Pacific Ocean, though a short-lived marine incursion is represented by the carbonates of La Tosca Member of the Huitrín Formation. The ammonoid faunas of the two basins are compared here, and a detailed biostratigraphic division of the sequences is discussed and compared with the Mediterranean succession. Copyright © 2007 John Wiley & Sons, Ltd. Fil:Aguirre-Urreta, M.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2007 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00721050_v42_n2_p143_AguirreUrreta http://hdl.handle.net/20.500.12110/paper_00721050_v42_n2_p143_AguirreUrreta |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Ammonites Biostratigraphy Chañarcillo Basin Correlations Lower Cretaceous Neuquén Basin South America ammonite biostratigraphy correlation Cretaceous divergence fauna fossil assemblage island arc sequence boundary sequence stratigraphy Andes Argentina Atacama Chanarcillo Chile Neuquen Basin South America Ammonoidea |
| spellingShingle |
Ammonites Biostratigraphy Chañarcillo Basin Correlations Lower Cretaceous Neuquén Basin South America ammonite biostratigraphy correlation Cretaceous divergence fauna fossil assemblage island arc sequence boundary sequence stratigraphy Andes Argentina Atacama Chanarcillo Chile Neuquen Basin South America Ammonoidea Aguirre-Urreta, Maria Beatriz The Lower Cretaceous Chañarcillo and Neuquén Andean basins: Ammonoid biostratigraphy and correlations |
| topic_facet |
Ammonites Biostratigraphy Chañarcillo Basin Correlations Lower Cretaceous Neuquén Basin South America ammonite biostratigraphy correlation Cretaceous divergence fauna fossil assemblage island arc sequence boundary sequence stratigraphy Andes Argentina Atacama Chanarcillo Chile Neuquen Basin South America Ammonoidea |
| description |
The Chañarcillo and Neuquén basins of the Central Andes shared a common geological history in the earlier part of the Early Cretaceous but from Barremian times onward their evolution began to diverge, probably due to an increasing activity of an intervening volcanic arc. The Berriasian to Lower Barremian sequences were mainly marine and include rich ammonoid faunas, with many taxa in common to both the basins. They include both Andean and near-pandemic forms, the latter providing some good correlation levels with the 'standard' Mediterranean sequence. Marine conditions persisted in the Chañarcillo Basin till Early Albian times; the associated ammonoid faunas include pandemic, Pacific and Antarctic genera. In contrast, in the Neuquén Basin evaporites and continental clastics of the Huitrín Formation mark the beginning of a long disconnection with the Pacific Ocean, though a short-lived marine incursion is represented by the carbonates of La Tosca Member of the Huitrín Formation. The ammonoid faunas of the two basins are compared here, and a detailed biostratigraphic division of the sequences is discussed and compared with the Mediterranean succession. Copyright © 2007 John Wiley & Sons, Ltd. |
| author |
Aguirre-Urreta, Maria Beatriz |
| author_facet |
Aguirre-Urreta, Maria Beatriz |
| author_sort |
Aguirre-Urreta, Maria Beatriz |
| title |
The Lower Cretaceous Chañarcillo and Neuquén Andean basins: Ammonoid biostratigraphy and correlations |
| title_short |
The Lower Cretaceous Chañarcillo and Neuquén Andean basins: Ammonoid biostratigraphy and correlations |
| title_full |
The Lower Cretaceous Chañarcillo and Neuquén Andean basins: Ammonoid biostratigraphy and correlations |
| title_fullStr |
The Lower Cretaceous Chañarcillo and Neuquén Andean basins: Ammonoid biostratigraphy and correlations |
| title_full_unstemmed |
The Lower Cretaceous Chañarcillo and Neuquén Andean basins: Ammonoid biostratigraphy and correlations |
| title_sort |
lower cretaceous chañarcillo and neuquén andean basins: ammonoid biostratigraphy and correlations |
| publishDate |
2007 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00721050_v42_n2_p143_AguirreUrreta http://hdl.handle.net/20.500.12110/paper_00721050_v42_n2_p143_AguirreUrreta |
| work_keys_str_mv |
AT aguirreurretamariabeatriz thelowercretaceouschanarcilloandneuquenandeanbasinsammonoidbiostratigraphyandcorrelations AT aguirreurretamariabeatriz lowercretaceouschanarcilloandneuquenandeanbasinsammonoidbiostratigraphyandcorrelations |
| _version_ |
1768546576775512064 |