[Colofornian]

What's to be excited about? It likely simply evolved from bigger pieces of rock as it was simply roughed up vs. bigger pieces of rock by natural forces...given enough time.

[piasa]

No way- that's a deliberate pattern of percussion flaking you see there and is wholly reproduceable by modern flintknappers- but the odds of getting that lucky via Momma Nature are very very slim. If it was ever used there would be obvious and undeniable use wear on the bit end as well, and this one likely has it unless it was a cache item stored for later use that got lost, or had been reserved as "sacrifices" as sometimes happened to tools used by Great lakes indians who thought they could placate lake spirits with gifts.

More modern North American celts / axes are found on the web site below ae made in a combination of ways, most made entirely or finished by a pecking and grinding method as opposed to just being made exclusively via percussion- but it's interesting and informative:

AXE ME NO QUESTIONS