Geophysical evidence for a large impact structure on the Falkland (Malvinas) Plateau

Maximiliano C.L. Rocca, Michael R. Rampino, Jaime L. Báez Presser

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish (US)
Pages (from-to)233-237
Number of pages5
JournalTerra Nova
Issue number4
StatePublished - Aug 2017

ASJC Scopus subject areas

  • Geology


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