- 8000-2300 B.P.
- Type site is Lady Island, Columbia River. Oregon and Washington.
- Lady Island Pentagonal
Lady Island Pentagonal
- Time Period : 8000-2300 B.P.
- Location : Type site is Lady Island, Columbia River. Oregon and Washington.
- Shape : Other
All points are undercut at the shoulder to form a single serration cutter. A "shoulder" is formed in the blade by resharpening. This modification can be found on dart and arrow points in the lower Columbia and other parts of the northwest.
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