Early, Middle, Late Periods
Archaeologist divide Taltheilei Shale Tradition into periods based on their tools.
- Their Early Period, 750 BC. - AD 200, is characterized by the presence of stemmed projectile points.
- The Middle Period, AD 200 - 700, is characterized by fewer stemmed projectile points and the appearance of lanceolate specimens.
- The Late Period, AD 700 - 1700, is characterized by the introduction of side-notched and corner-notched points.
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