Diagnostic Artifacts

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18CR92 Heise #20 argillite Brewerton Side Notched expanding stem Late Archaic Period side-notched straight base straight blade

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18CR92 Heise #20 Clagett concave base excurvate blade expanding stem Late Archaic Period rhyolite stemmed

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18CR92 Heise #20 bifurcate bifurcate base Early Archaic Period expanding stem LeCroy rhyolite straight blade

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18CR92 Heise #20 concave base Late Archaic Period rhyolite stemmed straight blade straight stem Susquehanna Broadspear

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