Coastal migration

In paleoanthropology, coastal migration refers to the early human migrations in the Out of Africa scenario, following paths predominantly along coastal routes. Other terms, such as southern coastal route,rapid coastal settlement,coastal migration theory and coastal migration model, are also used.

The coastal route theory is primarily used to describe the initial peopling of the Arabian peninsula, India, Southeast Asia, New Guinea, Australia, near Oceania, coastal China, and Japan. It is linked with the presence and dispersal of mtDNA haplogroup M and haplogroup N, as well as the specific distribution patterns of Y-DNA haplogroup C and haplogroup D, in these regions. The theory proposes that humans, likely similar to the Negritos or Proto-Australoids of modern times, arrived in the Arabian peninsula from Africa, then on the southern coastal regions of the Indian mainland, followed by spread to the Andaman Islands and modern-day Indonesia, and thence branching southwards to Australia and northwards towards Japan.National Geographic's Genographic Project uses the term 'Coastal Clan' to describe the initial human groups of Y-DNA haplogroup C who expanded eastwards out from Africa along the coastal route around 50 kybp (kiloyears before present; thousands of years before present).

Roger Blench discusses the theory in relation to language families.

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