Any ideas on type? Full base for sure....

[Arrow1492]

From Wisconsin. Base was being thinned, likely from the side when it broke. Well flaked.
Any ideas when and what it is?
Thanks

 

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[old digger]

Heartbreaker for sure! Looks like the base of what would have been a nice sized knife.

 

[Arrow1492]

Yep-wish it was whole. There is flaking that extends from the edge to the center. Any guys out there familiar with types? Any idea? Thx

 

[justonemore]

Being a Wisconsin find you might want to consider a Cresap Stemmed or an Adena as most likely possibilities.