A small group of exotic obsidian blades supplied from over 600km distant reached a particular area of the East Mound at Çatalhöyük in the Early Ceramic Neolithic (7000-6300 cal BC). The authors explore a variety of explanations and contexts, including changes in technology, agricultural expansion, gift exchange, bride-wealth and incomers from the east.
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Carter et al. (2008) studied this question.
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