Geological Map of Marambio Island (Seymour Island)

The Cretaceous-Paleogene sequence on Seymour Island has been mapped in terms of four previously named units: the Lopez de Bertodano Formation (Cretaceous-Paleocene), the Sobral Formation (Paleocene), the Cross Valley Formation (Late Paleocene), the La Meseta Formation (Eocene), the glacimarine post Pliocene deposits of the Weddell Formation, and the intrusive rocks of the Pliocene. The stratigraphy, structural characteristics, and facies architecture of the La Meseta and Cross Valley Formations were mapped last year.

The Lopez de Bertodano and Sobral Formations will be mapped this year. The data is reproduced on a topographic map, scale 1:10000, produced by the US Geological Survey in cooperation with the Instituto Antartico Argentino and the Byrd Polar Research Center of Ohio State University under the National Science Foundation Agreement No.: opp-911487.