Cooper's Ferry
Specimen number:
45.9, -116.39
Date min:
13,115 Bp
Date max:
13,300 Bp
Homo, Homo sapiens
Time periods:
Tarantian, Pleistocene

73-628 is a stemmed projectile point discovered in pit feature A2 (PFA2), Area A at Cooper’s Ferry site in Idaho [1][2].


The 73-628 stemmed projectile point is made from cryptocrystalline silicate and weighs 5.2 g. It has a maximum length of 63.6 mm, a maximum width of 17.8 mm, and a maximum thickness of 4.5 mm. It has been AMS radiocarbon dated to 13,300-13,115 cal BP. The source for the material used for 73-626 is located 16 km to the southeast of Cooper’s Ferry near White Bird, Idaho [1][2].

The stem of 73-628 has slightly convex margins, which sharply taper to a flat base. An oblique angled slightly eared shoulder can only be seen on one side, which extends up to a convex blade that tapers sharply toward a sharp tip. The opposite blade edge is uneven and lacks a well-defined shoulder. The flaking pattern is invasive and weakly collateral and secondary edge trimming is seen in the removal of small flakes from both margins [1].


Cited References

  1. 1.

  2. 2.

This page was last edited on January 22, 2023 at 21:40:57 UTC