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| Format: | Artículo científico |
| Language: | en |
| Published: |
Sociedad Geológica Mexicana, A.C.
2022
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| Online Access: | https://www.redalyc.org/articulo.oa?id=94375431005 https://www.redalyc.org/journal/943/94375431005/ https://www.redalyc.org/journal/943/94375431005/html/ https://www.redalyc.org/journal/943/94375431005/94375431005.epub https://www.redalyc.org/journal/943/94375431005/movil https://doi.org/10.18268/BSGM2022v74n1a250821 |
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Table of Contents:
- Disconformity between the El Abra Formation underlying the “Temazcal unit” in Cerro Quemado locality, Temazcal, San Luis Potosí, Mexico: Biostratigraphy and microfacies analysis Lourdes Omaña Rubén Alfonso López Doncel José Ramón Torres Hernández José Rafael Barboza Gudiño Ciencias de la Tierra Mexico Disconformity “Temazcal unit” San Luis Potosí El Abra Formation On the western part of the Valles-San Luis Potosí Platform located in Cerro Quemado near Temazcal, municipality of Armadillo de Los Infante, two sequences crop out. The lower one is the shallow-water El Abra Formation of the mid-upper Cenomanian, unconformably covered by a deep-water deposit of the upper Maastrichtian informally called here the “Temazcal unit.” The succession presents a nonconforming contact between these two sedimentary units, displaying a hiatus as the result of a time of non-deposition in the sedimentary record, showing a subaerial exposure with erosion yielding topographic relief. Based on the lithological changes from the underlying limestone toward the overlying silty limestone, as well as a detailed biostratigraphic study based on foraminiferal associations that provide an accurate dating, it has been possible to estimate the magnitude of the hiatus, which spans from the lower part of the Turonian, including the Coniacian, the Santonian, and possibly the lower part of the Maastrichtian. 2022 artículo científico 1405-3322 https://www.redalyc.org/articulo.oa?id=94375431005 https://www.redalyc.org/journal/943/94375431005/ https://www.redalyc.org/journal/943/94375431005/html/ https://www.redalyc.org/journal/943/94375431005/94375431005.epub https://www.redalyc.org/journal/943/94375431005/movil https://doi.org/10.18268/BSGM2022v74n1a250821 en http://www.redalyc.org/revista.oa?id=943 Boletín de la Sociedad Geológica Mexicana application/pdf Sociedad Geológica Mexicana, A.C. Boletín de la Sociedad Geológica Mexicana (México) Num.1 Vol.74