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
Lawrence Line Lawrence Line The Lawrence Line was a boundary line or partition line drawn through the Province of New Jersey during the colonial period, dividing it into the Province of West Jersey and the Province of East Jersey. The line was created by surveyor John Lawrence in 1743, and sought to offer final resolution to the division between the two proprietary colonies set out on the Quintipartite Deed (1676) which divided New Jersey by a straight line from "the Northernmost Branch of said Bay or River of De la Ware which is in forty-one Degrees and forty minutes of latitude…unto the