Dr Jack Hough from the University of Illinios went to Antarctica with Admiral Byrd and took core samples. These samples were returned to the Carnegie Institute and were tested by being subjected to the Ionium method, the most accurate form of dating. System developed by WD Urry. Dating coincides with the Great Flood stories of Noah, Enkidu, Deucalion, etc. 538 Oronteus Finaeus Map of 1531 shows Antarctica.
AD shows full interior details, including river systems, etc.
541 Ptolemy map of 235 BC shows in margins references from where map was copies in the library at Alexandria.