Here's a piece that I pulled out of the dirt piled up from the trash pit on a farm owned by my family a couple of Thanksgivings ago. It looks like it has been worked some. No flint naturally occurring there, though Alibates Quarry is 120 or so miles away. Not sure what it is, but somebody carried a it a long way for the travel of that day and then it ended up several feet under ground for a while.

[Linked Image]

[Linked Image]