Figure 5b: The bedrock is fine-grained dolomite, while the artefacts scattered on the ground surface include oolitic dolomite flakes and hammer stones of non-local sandstone.
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Figure 5a: The Jiulongshuiku site near an ancient quarry, probably for making preforms of spades.
Figure 5b: The bedrock is fine-grained dolomite, while the artefacts scattered on the ground surface include oolitic dolomite flakes and hammer stones of non-local sandstone.