The Indonesian region results from the evolution and convergence of the Eurasian continental plate, the Pacific oceanic plate, and the Indian Ocean-Australian Plate (Hamilton, 1979). It is generally accepted that the physiographic setting of the Indonesian archipelago is dominated by two continental shelf regions: the Sunda
shelf area (or Sundaland) lies to the west, and the Sahul/Arafura shelf area to the east.
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