Wallace Line by the Sahul Shelf to New Guinea. The biogeographic boundary known as Lydekker's Line, which separates the eastern edge of Wallacea from the Australian region, has a similar origin to the Wallace line. During ice age glacial advances, when the , both Asia and Australia were united with what are now islands on their respective continental shelves as continuous land masses, but the deep water between those two large continental shelf areas was, for over 50 million years, a barrier that kept the flora and fauna of Australia separated from those of Asia. Wallacea consists of islands that were not
History of the South Island line and West Island line March 2015. South Island Line opened on 28 December 2016. First train was dispatched from South Horizons at 05:55. Papers from Government and Legislature Press releases History of the South Island line and West Island line The history of the South Island Line and West Island Line encompasses a number of proposals which were made for extending the Hong Kong MTR metro system to the south and west of Hong Kong Island, which were not serviced by any rail transport before 2014. The West Island Line opened as an extension of the Island Line on 28 December 2014. The South