The present study attempts to explore the variables behind the diversity of endscraper morphology focusing on lithic reduction processes. Late Paleolithic assemblages of Korea are dominated by formalized technology using quality cryptocrystalline raw materials such as silicified tuff and obsidian, while vein quartz and quartzite were still widely used. Many researchers so far have focused on morphological stasis, rather than dynamics, to classify and discuss the diversity of tool types including endscrapers. Ethnographic and experimental studies, however, indicate many small stone tools including endscrapers were products of dynamic reduction processes of tool manufacture, use, reuse and recycle.
Hunter-gatherers of high mobility are characterized by curated technology which emphasizes tool maintenance using high quality raw materials. Given that endscrapers made on blades are good for recycling, small retouched tools are likely final discarded forms that underwent continuous reuse and recycle processes. Endscrapers from Neulgeo-ri, Dwikgol, Yongsujaeul and Sangsa-ri, all from the Hantan River Basin, provide excellent examples of diverse tool morphologies using different raw materials such as vein quartz, silicified tuff and obsidian. Diversity of hunter-gatherer mobility patterns using different raw material types is likely the main variable behind the different reduction strategies of endscrapers.