Burin cuts

[Out Of Time]

I'm curious how common this practice of repurposing by burin cutting worked blades ? Pretty sure I read that burin cuts are associated with older cultures and maybe blade/core technology, but confess I don't remember much about the subject. I find stuff that seems to display this technique quite often here in California's North Coast Range, mostly in context of mid-archaic sites.
I wonder if you all find similar things in your neck of the woods? Or what you know about burin cutting more generally?

BTW, not exactly sure what makes a burin cut (technically), so in this instance I'm talking about 'chopped or snapped'- looking edges.

Here are a couple I found recently.

Thanks for looking.

 

Amazon Forum Fav 👍

Diving for Pleasure and Treasure - Grab it through Amazon!

[Relicgrubber]

 

[CreekSide]

I’m not sure if we have those or not. Good finds

 

[Out Of Time]

View attachment 2104097

That's terrific information, thanks. Do ever find any like that?

 

[Relicgrubber]

That's terrific information, thanks. Do ever find any like that?

I have a few. Don't know if it was intentional or and impact fracture tho...