Stratigraphic evolution and karstification of a Cretaceous Mid‐Pacific atoll (Resolution Guyot) resolved from core‐log‐seismic integration and comparison with modern and ancient analogues

Atolls are faithful recorders helping us understand eustatic variations, the evolution of carbonate production through time, and changes in magmatic hotspots activity. Several early Cretaceous Mid-Pacific atolls were previously investigated ocean drilling, but due to low quality vintage seismic data available, few spatial constraints exist on their stratigraphic large-scale diagenesis. Here, we present results from an integrated core-log-seismic study at Resolution Guyot comparison with modern ancient analogues. We identify six seismic-stratigraphic units: (1) platform initiation aggradation backstepping Hauterivian which ended by emersion; (2) reflooding progradation Barremian till early-Aptian when anoxic event 1a resulted incipient drowning; (3) mid-Aptian shifted mid-Albian; (4) (5) ending latest-Albian (6) final drowning. The surfaces bounding these units coeval some events, suggest control this atoll confirm that several reported sea-level variations driven eustasy. Changes subsidence rates suspected later magmatism have also impacted evolution. could lead environmental perturbations potentially demise. Contrary previous studies, two emersion events during mid- late-Albian intensive meteoric dissolution karstification. margin syndepositional fractures interacted subaerial exposure focusing formed vertically stacked flank-margin fracture-cave system. gives a unique insight into interplay between eustasy, subsidence, volcanic activity(ies) long-term shallow-marine carbonates. It documents impact distribution hypogenic epigenic fluid-flow serving as analogue for isolated platforms.