Latest Barremian - early Aptian chronostratigraphy and sedimentary evolution of the northwestern Maestrat Basin
García Penas, Álvaro (Universidad Zaragoza)
Zamora, Samuel (Instituto Geológico y Minero de España)
Moreno Bedmar, Josep Anton (Universidad Nacional Autónoma de México)
Calvin, Pablo (Instituto Geológico y Minero de España de España)
Aurell, Marcos (Universidad Zaragoza)

Data:	2025
Resum:	Some aspects on the age and correlation of the upper Barremian-lower Aptian stratigraphic units of the NW Maestrat Basin were uncertain prior to this study, due to the differing lithostratigraphy of the marginal Oliete subbasin compared to the more depocentral Galve and Morella subbasins. New magnetostratigraphic, ammonite and sedimentological data presented in this study refine the age and sequence stratigraphy of the upper Barremian-lower Aptian succession, enabling a direct and precise correlation across these subbasins. Three third-order TR sequences are identified. The lower boundary of Sequence 1 corresponds to a transgressive surface found on top of the continental red beds of the lower Morella Fm. These beds are equivalent in age to the continental succession of the upper Blesa Fm. (Fm. (Oliete subbasin). The boundary between the M1 and M0r magnetozones (latest Barremian) is found above this surface, in the lower part of the Alacón Fm. Sequence 1 includes the lower part of the Alacón Fm. , which passes basinwards to the upper Morella and Xert formations. Sequence 2 corresponds to the upper part of the Alacón Fm and basinwards to the Cap de Vinyet and Barra de Morella members of the Forcall Fm. The boundary between the M0r and C34n magnetozones (earliest Aptian) is found towards the lowermost part of Sequence 2. Sequence 3 includes the Josa Fm and its offshore equivalents, the Morella la Vella Mb. and the Villarroya de los Pinares Fm. Additionally, the overall facies distribution in successive depositional stages is reconstructed, describing the lateral transition from marginal protected to open marine areas. The improved chronostratigraphic framework presented here will enable more accurate correlations with other subbasins of the Maestrat Basin, and the reconstructed sedimentary evolution may be useful for the interpretation of other Lower Cretaceous successions of the Tethys.
Ajuts:	Ministerio de Ciencia e Innovación PID2021-122612OBI00 Agencia Estatal de Investigación PID2019-108753GB-C21 Agencia Estatal de Investigación PID2020-113912GB-I00
Nota:	Altres ajuts: Group E18 (Aragosaurus: Recursos Geolgicos y Palaeoambientes) del Ministerio de Ciencia e Innovación, European Regional Development Fund i el Govern d'Aragó
Nota:	Altres ajuts: Álvaro Garca-Penas contracte predoctoral PRE2018-084468 cofinançat pel Govern d'Espanya i el European Social Fund (ESF)
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre i quan aquestes es distribueixin sota la mateixa llicència que regula l'obra original i es reconegui l'autoria.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Cretaceous ; Iberia ; Magnetostratigraphy ; Ammonites ; Cretaceous, iberia, sequence stratigraphy, magnetostratigraphy, ammonites
Publicat a:	Geologica acta, Vol. 23 (2025) , p. 1-23, I-III (Carbonate successions from Iberia and the Caribbean - Homage to Ramon Salas) , ISSN 1696-5728

Adreça original: https://revistes.ub.edu/index.php/GEOACTA/article/view/47124
Adreça alternativa: https://raco.cat/index.php/GeologicaActa/article/view/435154
DOI: 10.1344/GeologicaActa2025.23.1

32 p, 40.4 MB

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