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El Ordovícico Medio del Anti-Atlas marroquí: paleobiodiversidad, actualización bioestratigráfica y correlación

The Middle Ordovician of the Moroccan Anti-Atlas: Paleobiodiversity, biostratigraphic review and correlation
Authors: Gutiérrez Marco, Juan Carlos; Destombes, Jacques; Rábano, Isabel; Aceñolaza, Guillermo Federico; Sarmiento Chiesa, Graciela Noemí; San José Lancha, Miguel Ángel de;

El Ordovícico Medio del Anti-Atlas marroquí: paleobiodiversidad, actualización bioestratigráfica y correlación

Abstract

Las formaciones del Ordovícico Medio del Anti-Atlas (sur de Marruecos) han librado un variado registro de trilobites, moluscos, equinodermos, braquiópodos, graptolitos, microfósiles e icnofósiles en alrededor de 180 localidades. Gran parte de ellas fueron descubiertas durante la realización de la cartografía geológica a escala 1:200.000 y la mayoría del material paleontológico permanece inédito. En este trabajo se revisa el marco geológico de todas las localidades fosilíferas conocidas (tanto las publicadas como las inéditas), poniéndose en evidencia numerosas discrepancias litoestratigráficas en relación con estudios precedentes. Además de la evaluación estratigráfica, se revisa el contenido paleontológico de cada formación y localidad, actualizando la taxonomía de muchas de las formas identificadas. Desde el punto de vista cronoestratigráfico, el conjunto de la Formación Tachilla y las cinco formaciones del Grupo Primer Bani se adscriben por vez primera a la escala regional mediterránea. Los límites Oretaniense-Dobrotiviense y Dobrotiviense-Berouniense se sitúan, respectivamente, en la Formación de Bou-Zeroual y en el techo de la Formación Izegguirene. El tránsito Oretaniense inferior-superior se emplaza provisionalmente en el tercio superior de la Formación Tachilla, y el límite Dobrotiviense inferior-superior hacia la base o en la parte inferior de la Formación Ouine-Inirne. También se aporta la correlación general de las unidades del Ordovício Medio antiatlásico con respecto a la escala estándar o global del sistema Ordovícico. La base de la Serie Ordovícico Superior se sitúa probablemente en la parte inferior de la región como un centro importante de diversificación para numerosas faunas mediterráneas, las cuales experimentan una amplia dispersión posterior en las plataformas marinas del norte de Gondwana.

Country
Spain
Keywords

2506.19 Estratigrafía, Ordovicien, 56:551.7(64), Bioestratigrafía, Ordovician, Biostratigraphy, Correlación, Biodiversity, 2416 Paleontología, Biodiversidad, Paleontología, Correlation, Maroc, Morocco, Biostratigraphie, Marruecos, Geología estratigráfica, Darriwilien, Biodiversité, Correlaciones, Darriwiliense, Darriwilian, Ordovícico

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
views
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Related to Research communities
Italian National Biodiversity Future Center