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pieces are "craze:d" or heat-cracked. The 21 hearths that have been • <br />exposed during mitigation excavations also suggest the possible causes <br />of this too-ranicily-fired lithic debris. It still rnriai_ns problematic <br />whether the heating of these chests in the hearth was inadvexterit <br />(materials "dropped" into the fire) or whether these prehistoric <br />peoples were experimenting with heat treatment and we have recovered <br />their "failures." <br />• <br />• <br />48 <br />