Simpson point
From Infogalactic: the planetary knowledge core
The Simpson point is a Paleo-Indian projectile point with a wide blade noted for exhibiting a narrowed 'waist' (middle section). It also features a concave base and eared basal corners. It was named in 1962 by Ripley P. Bullen. Points are mostly dated to 9000BC [1] and are considered to be a typical example of the Middle Paleo-Indian subperiod (9000-8500 BC).[2]
References
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