Late Jeulmun
The subsistence pattern of the Late Jeulmun period (c. 2000-1500 BC) is associated with a de-emphasis on exploitation of shellfish, and the settlement pattern registered the appearance of interior settlements such as Sangchon-ri (see Daepyeong) and Imbul-ri. Lee suggests that environmental stress on shellfish populations and the movement of people into the interior prompted groups to become more reliant on cultivated plants in their diets. The subsistence system of the interior settlements was probably not unlike that of the incipient Early Mumun pottery period (c. 1500-1250 BC), when small-scale shifting cultivation ("slash-and-burn") was practiced in addition to a variety of other subsistence strategies. The Late Jeulmun is roughly contemporaneous with Lower Xiajiadian culture in Liaoning, China. Archaeologists have suggested that Bangudae and Cheonjeon-ri, a substantial group of petroglyph panels in Ulsan, may date to this sub-period, but this is the subject of some debate.
Kim Jangsuk suggests that the hunter-gatherer-cultivators of the Late Jeulmun were gradually displaced from their "resource patches" by a new group with superior slash-and-burn cultivation technology and who migrated south with Mumun or undecorated (Hangeul: 무문토기; Hanja: 無文土器) pottery. Kim explains that the pattern of land use practiced by the Mumun pottery users, the dividing up of land into sets of slash-and-burn fields, eventually encroached on and cut off parts of hunting grounds used by Jeulmun pottery users.
Read more about this topic: Jeulmun Pottery Period
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