Yeah, I'm not sure there was much in the way of accurate seismology or cartography going on then.
15 ka (Fifteen Thousand Years Ago) -- The last Ice Age ends. Sea levels across the globe rise, flooding many coastal areas, and separating former mainland areas into islands. Japan separates from Asia mainland. Siberia separates from Alaska. Tasmania separates from Australia. Java island forms. Sarawak, Malaysia and Indonesia separate. The cave paintings of Lascaux and Altamira were produced. Sedentary hunter-gather societies develop in the Natufian culture of the Near East - an essential precursor to later agricultural societies.