Diagnostic Artifacts

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18CR114 Heise #50 convex base excurvate blade Guilford lanceolate Middle Archaic Period N/A stem rhyolite

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18FR28 Mountaindale contracting stem excurvate blade Guilford lanceolate Middle Archaic Period rhyolite straight base

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18PR163 Cash Lake contracting stem excurvate blade Guilford lanceolate Middle Archaic Period quartzite straight base

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Surveys-MiddlePotomac Middle Potomac River Valley of Maryland and Virginia excurvate blade Guilford lanceolate N/A stem quartzite straight base

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Collections-LathroumCollection Lathroum Collection contracting stem convex base excurvate blade Guilford lanceolate Middle Archaic Period quartzite

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Collections-WebbCollection Webb Collection convex base excurvate blade Guilford lanceolate Middle Archaic Period N/A stem rhyolite

An online guide to artifacts from the Middle Atlantic by the Maryland Archaeological Conservation Laboratory