Central Asia is loosely separated from South-West Asia because there are no clear geographical boundaries between the two. Central Asia centers on what is now eastern Iran, Turkmenistan, Afghanistan, and Pakistan. South Asia is mainly present day India. The northeast boundary that divides South Asia from Central Asia is the Indus River. (1)
East Asia’s boundaries are primarily marked by the borders of modern countries. China is one sub-region of East Asia although the north is boundary is at approximately 45 degrees latitude through the Gobi Desert. The Korean peninsula is the other sub-region of East Asia. South-East Asia is separated into mainland and island sub-regions. The remaining islands east of New Guinea comprise Remote Oceania. Australia and New Zealand were left out of the sectioning of Asia and Oceania because of minimal evidence for independent domestication. (2)
(1) Barker, G. (2009). The agricultural revolution in prehistory: Why did foragers become farmers?. Oxford: Oxford University Press. Pp. 149.
(2) Barker, G. (2009). The agricultural revolution in prehistory: Why did foragers become farmers?. Oxford: Oxford University Press. Pp. 182.