2017/05/04 by Maximiliano C. L. Rocca, Michael R. Rampino, Jaime Leonardo Báez Presser · 1 citation
Earth and Planetary Sciences · Environmental Science · Physics and Astronomy · #Geology and Paleoclimatology Research #Methane Hydrates and Related Phenomena #Planetary Science and Exploration
paper · doi:10.1111/ter.12269
openalex publication_date 2017/05/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Abstract A large, roughly circular structural basin is recognised on the Falkland (Malvinas) Plateau to the NW of West Falkland (Gran Malvina) Island (S 51°00′, W 62°00′). The basin, seen in seismic‐reflection profiles and evident as a large negative gravity anomaly, has a diameter of ~250 km. The age of the basin is estimated to be Late Palaeozoic. It is completely buried by younger sediments and has no topographic expression on the sea floor. We propose that the basin and geophysical anomalies, especially the combination of a large circular negative gravity anomaly with a rim of positive anomalies, and a marked circular series of positive magnetic anomalies in the same area, may be best explained by the presence of a large buried impact structure.