Corals on the slope (Aptian, Maestrat Basin, Spain)

Bover‐Arnal, Telm; Löser, Hannes; Moreno‐Bedmar, Josep Anton; Salas, R.; Strasser, André

doi:10.1016/j.cretres.2012.03.001

Cited by 31 publications

(8 citation statements)

References 91 publications

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“…Decimetric wholly preserved isolated coral colonies in growth position are also important constituents of this lithofacies. Similar coral populations have been analysed for the same time interval in slope settings from the western Maestrat Basin (Bover‐Arnal et al ., ). The colonies display platy (Fig.…”

Section: Lithofacies Classificationmentioning

confidence: 99%

Deep incision in an Aptian carbonate succession indicates major sea‐level fall in the Cretaceous

et al. 2014

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Long-term relative sea-level cycles (0Á5 to 6 Myr) have yet to be fully understood for the Cretaceous. During the Aptian, in the northern Maestrat Basin (Eastern Iberian Peninsula), fault-controlled subsidence created depositional space, but eustasy governed changes in depositional trends. Relative sea-level history was reconstructed by sequence stratigraphic analysis. Two forced regressive stages of relative sea-level were recognized within three depositional sequences. The first stage is late Early Aptian age (intra Dufrenoyia furcata Zone) and is characterized by foreshore to upper shoreface sedimentary wedges, which occur detached from a highstand carbonate platform, and were deposited above basin marls. The amplitude of relative sea-level drop was in the order of tens of metres, with a duration of <1 Myr. The second stage of relative sea-level fall occurred within the Late Aptian and is recorded by an incised valley that, when restored to its pre-contractional attitude, was >2 km wide and cut ≥115 m down into the underlying Aptian succession. With the subsequent transgression, the incision was back-filled with peritidal to shallow subtidal deposits. The changes in depositional trends, lithofacies evolution and geometric relation of the stratigraphic units characterized are similar to those observed in coeval rocks within the Maestrat Basin, as well as in other correlative basins elsewhere. The pace and magnitude of the two relative sea-level drops identified fall within the glacio-eustatic domain. In the Maestrat Basin, terrestrial palynological studies provide evidence that the late Early and Late Aptian climate was cooler than the earliest part of the Early Aptian and the Albian Stage, which were characterized by warmer environmental conditions. The outcrops documented here are significant because they preserve the results of Aptian long-term sea-level trends that are often only recognizable on larger scales (i.e. seismic) such as for the Arabian Plate.

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Section: Lithofacies Classificationmentioning

confidence: 99%

Deep incision in an Aptian carbonate succession indicates major sea‐level fall in the Cretaceous

et al. 2014

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“…Specimens of Dufrenoyia sp. of the Dufrenoyia furcata Zone were found within a bed with a rudstone texture interpreted by Bover-Arnal et al (2009) as a forced regressive wedge, and in the overlying slopes of a lowstand normal regressive carbonate platform (Bover-Arnal et al, 2009;2012). Throughout the Maestrat Basin, the age of the Villarroya de los Pinares Formation ranges between the Deshayesites deshayesi and the Dufrenoyia furcata zones, but it is usually restricted to the middle part of the Dufrenoyia furcata Zone (Fig.…”

Section: Lower Albianmentioning

confidence: 99%

Lower Cretaceous (Hauterivian-Albian) ammonite biostratigraphy in the Maestrat Basin (E Spain)

García¹,

Moreno‐Bedmar

Bover‐Arnal

et al. 2014

Journal of Iberian Geology

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A review of the stratigraphic distribution of ammonoid species in the Lower Cretaceous (Hauterivian-Albian) of the Maestrat Basin (E Spain) was carried out. The specimens were mainly collected in the field by us and are stored in university or museum collections. Specimens from private collections and figured in the literature were also studied. We recognized 73 species that are distributed, in accordance with the latest version of the standard Mediterranean ammonite zonation for the Lower Cretaceous, in 14 ammonite zones: Acanthodiscus radiatus, Crioceratites loryi, Lyticoceras nodosoplicatum (Lower Hauterivian); Pseudothurmannia ohmi (Upper Hauterivian); Imerites giraudi (Upper Barremian); Deshayesites oglanlensis, Deshayesites forbesi, Deshayesites deshayesi, Dufrenoyia furcata (Lower Aptian); Epicheloniceras martini, Parahoplites melchioris, Acanthohoplites nolani (Upper Aptian); Leymeriella tardefurcata and Douvilleiceras mammillatum (Lower Albian). The recognition of these biozones allows a precise age calibration of the Maestrat Basin's lithostatigraphic units that contain ammonoids as well as an associated indirect age calibration of the formations without ammonoids. Consequently, this report provides an updated, comprehensive and precise biostratigraphic framework, which aims to become a reference for the analysis of the Lower Cretaceous strata of the Maestrat Basin. The results are also relevant for the analysis of coeval ammonite-bearing sedimentary successions found in other Tethyan basins.Keywords: ammonites, Lower Cretaceous, biostratigraphy, Maestrat Basin, Spain Resumen En este trabajo se ha realizado una revisión detallada de la distribución estratigráfica de las especies de ammonoideos del Cretácico inferior de la Cuenca del Maestrazgo (Este de España). Los ejemplares recolectados, principalmente por los autores, han sido depositados en colecciones universitarias y museísticas. Además hemos estudiado los ejemplares de colecciones privadas y figurados en la literatura. Hemos reconocido 73 especies que se distribuyen, siguiendo la última versión de la biozonación de ammonites mediterránea estándar del Cretácico inferior, en 14 zonas de ammonoideos: Acanthodiscus radiatus, Crioceratites loryi, Lyticoceras nodosoplicatum (Hauteriviense inferior); Pseudothurmannia ohmi (Hauteriviense superior); Imerites giraudi (Barremiense superior); Deshayesites oglanlensis, Deshayesites forbesi, Deshayesites deshayesi, Dufrenoyia furcata (Aptiense inferior); Epicheloniceras martini, Parahoplites melchioris, Acanthohoplites nolani (Aptiense superior); Leymeriella tardefurcata y Douvilleiceras mammillatum (Albiense inferior). El reconocimiento de estas biozonas permite precisar la edad de las unidades litoestratigráficas que contienen ammonites y también una calibración indirecta de las formaciones que no contienen ammonites. En consecuencia este trabajo proporciona un marco bioestratigráfico actualizado, exhaustivo y preciso que pretende ser una referencia para el análisis estratigráfico del Cretácico infe...

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“…These limestones pass progressively upward to grey marls containing coral colonies in life position, sponges and echinoids (LFT15), a facies equivalent to those described in detail by Bover‐Arnal et al . () (Fig. I to J).…”

Section: Resultsmentioning

confidence: 84%

Fault‐controlled dolostone geometries in a transgressive–regressive sequence stratigraphic framework

et al. 2020

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This study investigates the geometries of fault‐controlled dolostone geobodies and their structural and sequence stratigraphic controls, which provide new insights for the prediction and production of fault‐controlled dolomitized hydrocarbon reservoirs. A very thick succession (>1600 m) of Aptian–Albian shallow‐marine carbonates of the Benassal Formation that crop out in the Benicàssim area (Maestrat Basin, eastern Spain) is partly replaced by dolomite, resulting in dolostone geometries ranging from massive patches to stratabound bodies. Detailed mapping, systematic logging and correlation were carried out to characterize the structural, sedimentary and sequence stratigraphic framework of the area and to constrain the principal controls on the full‐range of dolostone geometries. The results show that carbonate sediments accumulated in a half graben stacked in three transgressive–regressive sequences. Large‐scale massive dolostone patches (with up to kilometre extension) formed near large‐scale faults indicating that they acted as entry points for warm dolomitizing fluids into the basin. These dolostone patches laterally pass to large stratabound bodies that extend for long distances (at least 7 km) away from feeding faults, forming a continuum. The presence of a regional unconformity and a clastic fine‐grain low‐permeability unit (Escucha Formation) on top of the Benassal Formation likely constrained the dolomitization fluids to an up to 580 m thick interval below the base of the Escucha Formation. Thus, only limestones within this interval, corresponding to the two uppermost transgressive–regressive sequences, were dolomitized. There is a clear relationship between the stratigraphic framework and the preferred replaced beds. Dolomitization preferentially affected sediments deposited in inner to middle ramp settings with predominant wackestone to packstone textures. Such facies are laterally most abundant in the east of the study area (i.e. basinward) and vertically in layers around the maximum flooding zone of the top sequence, which is preferentially affected by dolomitization.

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Corals on the slope (Aptian, Maestrat Basin, Spain)

Cited by 31 publications

References 91 publications

Deep incision in an Aptian carbonate succession indicates major sea‐level fall in the Cretaceous

Deep incision in an Aptian carbonate succession indicates major sea‐level fall in the Cretaceous

Lower Cretaceous (Hauterivian-Albian) ammonite biostratigraphy in the Maestrat Basin (E Spain)

Fault‐controlled dolostone geometries in a transgressive–regressive sequence stratigraphic framework

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