Proliferación de Microcodium durante el tránsito Cenomaniense- Turoniense en el Sur de Iberia: ¿consecuencia del OAE2 en zonas emergidas?
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Abstract
En el sur de Iberia (Cordillera Ibérica meridional y Prebético) el tránsito
Cenomaniense-Turoniense está definido por una sucesión de carbonatos
marinos muy someros que presentan abundantes evidencias de exposición
subaérea y paleosuelos (Fm.Alarcón). En esta sucesión se registra la primera
aparición conocida en Iberia de Microcodium. Esta aparición es abrupta y
podría estar relacionada con los cambios ambientales asociados a la
perturbación global del ciclo del carbono que indujo el evento de anoxia
oceánica OAE2
In southern Iberia (southern Iberian chain and Prebetic Zone) the Cenomanian to Turonian transition is characterized by a sedimentary succession of very shallow marine carbonates with abundant evidences of subaerial exposure and paleosols (Alarcón Fm.). That succession records the oldest known Microcodium in Iberia. Its first appearance is abrupt and probably related to the environmental changes associated to the global perturbation in the C cycle that trigger the oceanic anoxic event OAE2
In southern Iberia (southern Iberian chain and Prebetic Zone) the Cenomanian to Turonian transition is characterized by a sedimentary succession of very shallow marine carbonates with abundant evidences of subaerial exposure and paleosols (Alarcón Fm.). That succession records the oldest known Microcodium in Iberia. Its first appearance is abrupt and probably related to the environmental changes associated to the global perturbation in the C cycle that trigger the oceanic anoxic event OAE2
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