A 40km Impact Crater Found in the Arafura Sea. The Data Fits.

The physical markers of ancient impact events leave a specific and traceable signature in the sedimentary record. Dr. Dallas Abbott describes spherical aggregates - produced when stratospheric lightning strikes masses of sediment thrown up by submarine or land-based impacts, melting fragments into spherules that concentrate iron or silicate and cool rapidly into forms with distinctive quench textures. These markers, recovered from sediment cores in the Gulf of Carpentaria, pointed toward a crater candidate that took considerable time to locate - ultimately traced not to the Gulf itself but to a site near Papua New Guinea in the Arafura Sea. The crater candidate Dallas presents is significant in scale - approximately 40 kilometers in diameter, identified through satellite altimetry and vertical gravity gradient mapping. The gravity anomaly profile shows a close match between the data and the physical model, with a high density region at the center that Dallas notes is consistent with a central uplift - a feature the current model does not yet fully account for but which a crater of this size should produce. The sediment cores surrounding the site tell a consistent story - spherical aggregates with quench textures and native iron present across multiple locations, with the gravity gradient data providing the independent confirmation that ties the physical evidence to a specific and mappable impact structure. The data, Dallas concludes, fits.