Paleontological and stratigraphical data indicate that a link between terminal southern South America and the Antarctic Peninsula probably was an irregularly narrow continuous land from Late Cretaceous (Campanian) thr...Paleontological and stratigraphical data indicate that a link between terminal southern South America and the Antarctic Peninsula probably was an irregularly narrow continuous land from Late Cretaceous (Campanian) through the Eocene period. In paleogeographical feature it is more like modern Isthmus of Panama. A paleoisthmus called the isthmus of Scotia is hypothesized as a type of connection between them. It lasted about 35 Ma and extended about 700–900 km long and 100–200 krn wide. This isthmus played an important role in biotic dispersal and migra-tion among South America, Antarctica, Australia and New Zealand blocks during this interval.展开更多
文摘Paleontological and stratigraphical data indicate that a link between terminal southern South America and the Antarctic Peninsula probably was an irregularly narrow continuous land from Late Cretaceous (Campanian) through the Eocene period. In paleogeographical feature it is more like modern Isthmus of Panama. A paleoisthmus called the isthmus of Scotia is hypothesized as a type of connection between them. It lasted about 35 Ma and extended about 700–900 km long and 100–200 krn wide. This isthmus played an important role in biotic dispersal and migra-tion among South America, Antarctica, Australia and New Zealand blocks during this interval.
