Revisiting the Cupidito unit (Cupido Formation) along peritidal carbonates from northeastern Mexico
Depositional episodes are readily identified along representative localities of the Lower Cretaceous Cupido platform in northeastern Mexico. The basal part of the Cupido Formation exhibits a progradational reef platform that, at the upper limit, is truncated by a sequence boundary defined by a brec...
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Universidad Nacional Autónoma de México
2020-03-01
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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/1095 |
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| author | Felipe de Jesús Torres de la Cruz Elizabeth Chacón-Baca Gabriel Chávez-Cabello María Isabel Hernández-Ocaña |
| author_facet | Felipe de Jesús Torres de la Cruz Elizabeth Chacón-Baca Gabriel Chávez-Cabello María Isabel Hernández-Ocaña |
| author_sort | Felipe de Jesús Torres de la Cruz |
| collection | DOAJ |
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Depositional episodes are readily identified along representative localities of the Lower Cretaceous Cupido platform in northeastern Mexico. The basal part of the Cupido Formation exhibits a progradational reef platform that, at the upper limit, is truncated by a sequence boundary defined by a breccia. This breccia marks the development of a peculiar sedimentary facies informally known as the Cupidito unit, a distinctive stratigraphical unit in northeastern Mexico that remained uninterpreted for decades. Through the analysis of facies, microfacies and stable isotope comparisons from representative localities (Potrero Chico, Potrero de García, La Huasteca, La Muralla and Puerto Mexico) and from other previously reported outcrops, this work describes six diagnostic features for Cupidito and an improved stratigraphic model is proposed. The depositional sequence suggests a broad flat-topped platform with a general low organic productivity and restricted conditions followed by recurrent inundations of lagoon waters. Before drowning, this carbonate platform remained under equilibrium conditions interrupted by short pulses of relative higher-temperatures (48.3 °C and 39.2 °C). Coral-rudist-stromatoporoid patch-reefs with inferred inter-tropical temperatures between 31.5 °C and 32.2 °C originated as a progradational response to the instauration of a new Sequence Boundary at the base of Cupidito.
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| format | Article |
| id | doaj-art-82f93c5702c14636bdf1c6179bc30ce2 |
| institution | Kabale University |
| issn | 1026-8774 2007-2902 |
| language | English |
| publishDate | 2020-03-01 |
| publisher | Universidad Nacional Autónoma de México |
| record_format | Article |
| series | Revista Mexicana de Ciencias Geológicas |
| spelling | doaj-art-82f93c5702c14636bdf1c6179bc30ce22025-08-20T03:44:51ZengUniversidad Nacional Autónoma de MéxicoRevista Mexicana de Ciencias Geológicas1026-87742007-29022020-03-0137110.22201/cgeo.20072902e.2020.1.1095Revisiting the Cupidito unit (Cupido Formation) along peritidal carbonates from northeastern MexicoFelipe de Jesús Torres de la Cruz0Elizabeth Chacón-Baca1Gabriel Chávez-Cabello2María Isabel Hernández-Ocaña3Universidad Autónoma de Nuevo León, Posgrado de la Facultad de Ciencias de la Tierra, Carretera a Cerro 11 Prieto Km 8, Ex. Hacienda de Guadalupe, C.P. 67700, Linares N.L., Mexico.Universidad Autónoma de Nuevo León, Facultad de Ciencias de la Tierra, Carretera a Cerro 11 Prieto Km 8, Ex. Hacienda de Guadalupe, C.P. 67700, Linares N.L., Mexico.Universidad Autónoma de Nuevo León, Facultad de Ciencias de la Tierra, Carretera a Cerro 11 Prieto Km 8, Ex. Hacienda de Guadalupe, C.P. 67700, Linares N.L., Mexico.Universidad Autónoma de Nuevo León, Posgrado de la Facultad de Ciencias de la Tierra, Carretera a Cerro 11 Prieto Km 8, Ex. Hacienda de Guadalupe, C.P. 67700, Linares N.L., Mexico. Depositional episodes are readily identified along representative localities of the Lower Cretaceous Cupido platform in northeastern Mexico. The basal part of the Cupido Formation exhibits a progradational reef platform that, at the upper limit, is truncated by a sequence boundary defined by a breccia. This breccia marks the development of a peculiar sedimentary facies informally known as the Cupidito unit, a distinctive stratigraphical unit in northeastern Mexico that remained uninterpreted for decades. Through the analysis of facies, microfacies and stable isotope comparisons from representative localities (Potrero Chico, Potrero de García, La Huasteca, La Muralla and Puerto Mexico) and from other previously reported outcrops, this work describes six diagnostic features for Cupidito and an improved stratigraphic model is proposed. The depositional sequence suggests a broad flat-topped platform with a general low organic productivity and restricted conditions followed by recurrent inundations of lagoon waters. Before drowning, this carbonate platform remained under equilibrium conditions interrupted by short pulses of relative higher-temperatures (48.3 °C and 39.2 °C). Coral-rudist-stromatoporoid patch-reefs with inferred inter-tropical temperatures between 31.5 °C and 32.2 °C originated as a progradational response to the instauration of a new Sequence Boundary at the base of Cupidito. https://rmcg.unam.mx/index.php/rmcg/article/view/1095peritidal carbonatesdrowning platformdeposition modelsequence boundarystratiform microbial matspaleotemperature |
| spellingShingle | Felipe de Jesús Torres de la Cruz Elizabeth Chacón-Baca Gabriel Chávez-Cabello María Isabel Hernández-Ocaña Revisiting the Cupidito unit (Cupido Formation) along peritidal carbonates from northeastern Mexico Revista Mexicana de Ciencias Geológicas peritidal carbonates drowning platform deposition model sequence boundary stratiform microbial mats paleotemperature |
| title | Revisiting the Cupidito unit (Cupido Formation) along peritidal carbonates from northeastern Mexico |
| title_full | Revisiting the Cupidito unit (Cupido Formation) along peritidal carbonates from northeastern Mexico |
| title_fullStr | Revisiting the Cupidito unit (Cupido Formation) along peritidal carbonates from northeastern Mexico |
| title_full_unstemmed | Revisiting the Cupidito unit (Cupido Formation) along peritidal carbonates from northeastern Mexico |
| title_short | Revisiting the Cupidito unit (Cupido Formation) along peritidal carbonates from northeastern Mexico |
| title_sort | revisiting the cupidito unit cupido formation along peritidal carbonates from northeastern mexico |
| topic | peritidal carbonates drowning platform deposition model sequence boundary stratiform microbial mats paleotemperature |
| url | https://rmcg.unam.mx/index.php/rmcg/article/view/1095 |
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