Barremian planktonic foraminiferal events correlated with the ammonite zones from the San Lucas Formation, Michoacán (SW Mexico)
We studied the Tiringueo section from the San Lucas Formation, located in the state of Michoacán, SW Mexico. The section is a flysch sequence consisting of a rhythmic deposit of shale, siltstone, and fine to medium graded sandstone interbedded with limestone. The sequence contains ammonites, foramini...
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Universidad Nacional Autónoma de México
2018-05-01
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| Series: | Revista Mexicana de Ciencias Geológicas |
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| Online Access: | https://rmcg.unam.mx/index.php/rmcg/article/view/875 |
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| author | Lourdes Omaña Celestina González-Arreola Blanca Margarita Ramírez-Garza |
| author_facet | Lourdes Omaña Celestina González-Arreola Blanca Margarita Ramírez-Garza |
| author_sort | Lourdes Omaña |
| collection | DOAJ |
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We studied the Tiringueo section from the San Lucas Formation, located in the state of Michoacán, SW Mexico. The section is a flysch sequence consisting of a rhythmic deposit of shale, siltstone, and fine to medium graded sandstone interbedded with limestone. The sequence contains ammonites, foraminifera and radiolarians.
The biostratigraphic analysis, based on the planktonic foraminifera and ammonites, permitted the recognition of the biostratigraphic units established on both fossil groups, for first time in SW Mexico. Although the planktonic foraminifera are scarce and poorly preserved, some important events such as the first occurrence of Hedbergella similis, Globigerinelloides blowi and Globigerinelloides aptiensis were correlated with the ammonite zones. By means of these foraminiferal events, the Zones of Hedbergella similis and Globigerinelloides blowi partim (early and late Barremian) were identified. The faunal assemblage and distinctive lithological characteristics suggest that the San Lucas Barremian sequence was deposited in pelagic conditions.
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| format | Article |
| id | doaj-art-e7f37b8645df44c8af634a1914bec147 |
| institution | OA Journals |
| issn | 1026-8774 2007-2902 |
| language | English |
| publishDate | 2018-05-01 |
| publisher | Universidad Nacional Autónoma de México |
| record_format | Article |
| series | Revista Mexicana de Ciencias Geológicas |
| spelling | doaj-art-e7f37b8645df44c8af634a1914bec1472025-08-20T02:32:45ZengUniversidad Nacional Autónoma de MéxicoRevista Mexicana de Ciencias Geológicas1026-87742007-29022018-05-01221Barremian planktonic foraminiferal events correlated with the ammonite zones from the San Lucas Formation, Michoacán (SW Mexico)Lourdes Omaña0Celestina González-Arreola1Blanca Margarita Ramírez-Garza2Instituto de Geología, Universidad Nacional Autonóma de México, Ciudad Universitaria, Delegación Coyoacán, 04510, México, D.F., Mexico.Instituto de Geología, Universidad Nacional Autonóma de México, Ciudad Universitaria, Delegación Coyoacán, 04510, México, D.F., Mexico.Instituto de Geología, Universidad Nacional Autonóma de México, Ciudad Universitaria, Delegación Coyoacán, 04510, México, D.F., Mexico. We studied the Tiringueo section from the San Lucas Formation, located in the state of Michoacán, SW Mexico. The section is a flysch sequence consisting of a rhythmic deposit of shale, siltstone, and fine to medium graded sandstone interbedded with limestone. The sequence contains ammonites, foraminifera and radiolarians. The biostratigraphic analysis, based on the planktonic foraminifera and ammonites, permitted the recognition of the biostratigraphic units established on both fossil groups, for first time in SW Mexico. Although the planktonic foraminifera are scarce and poorly preserved, some important events such as the first occurrence of Hedbergella similis, Globigerinelloides blowi and Globigerinelloides aptiensis were correlated with the ammonite zones. By means of these foraminiferal events, the Zones of Hedbergella similis and Globigerinelloides blowi partim (early and late Barremian) were identified. The faunal assemblage and distinctive lithological characteristics suggest that the San Lucas Barremian sequence was deposited in pelagic conditions. https://rmcg.unam.mx/index.php/rmcg/article/view/875planktonic foraminifera, Barremian, San Lucas Formation, Michoacán, Mexico. |
| spellingShingle | Lourdes Omaña Celestina González-Arreola Blanca Margarita Ramírez-Garza Barremian planktonic foraminiferal events correlated with the ammonite zones from the San Lucas Formation, Michoacán (SW Mexico) Revista Mexicana de Ciencias Geológicas planktonic foraminifera, Barremian, San Lucas Formation, Michoacán, Mexico. |
| title | Barremian planktonic foraminiferal events correlated with the ammonite zones from the San Lucas Formation, Michoacán (SW Mexico) |
| title_full | Barremian planktonic foraminiferal events correlated with the ammonite zones from the San Lucas Formation, Michoacán (SW Mexico) |
| title_fullStr | Barremian planktonic foraminiferal events correlated with the ammonite zones from the San Lucas Formation, Michoacán (SW Mexico) |
| title_full_unstemmed | Barremian planktonic foraminiferal events correlated with the ammonite zones from the San Lucas Formation, Michoacán (SW Mexico) |
| title_short | Barremian planktonic foraminiferal events correlated with the ammonite zones from the San Lucas Formation, Michoacán (SW Mexico) |
| title_sort | barremian planktonic foraminiferal events correlated with the ammonite zones from the san lucas formation michoacan sw mexico |
| topic | planktonic foraminifera, Barremian, San Lucas Formation, Michoacán, Mexico. |
| url | https://rmcg.unam.mx/index.php/rmcg/article/view/875 |
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