期刊名称：Publicación Electrónica de la Asociación Paleontológica Argentina
电子版ISSN：2469-0228
出版年度：1998
卷号：5
期号：1
页码：155-162
出版社：Asociación Paleontológica Argentina
摘要：New elements of the La Meseta Formation megaflora are described. This unit crops out on the northern third of Marambio (Seymour) Island, Antarctica. Fossil leaves were collected from the middle part of this formation, dated as middle Eocene. Although the fossils are not well preserved, we identified elements assignable to the following families: Nothofagaceae (at least 3 species), Dilleniaceae, Myricaceae, Myrtaceae, and Lauraceae. However, it was impossible to identify some of the fossils, although all could be recognized as dicotyledonous angiosperms. A palaeoclimatic interpretation based on physiognomic analysis (independent of the taxonomy of the elements) indicates temperate to cool temperate and seasonably moist climate for this formation. This interpretation reinforces the existence of a latitudinal gradient between the Antarctic Peninsula and South America and their progressive migration towards the north as consequence of climatic deterioration during the Eocene-Oligocene. KEY WORDS. Megaflora. Palaeoclimate. La Meseta Formation. Marambio Island. Antarctica. Middle Eocene.
关键词：Megaflora; Palaeoclimate; La Meseta Formation; Marambio Island; Antarctica; Middle Eocene.
