Colonial Period Adz?

[Ripcon]

I found this adz at a circa. 1795 era Louisiana plantation. It was occupied until the early 1900's so there's a lot of time during which this site was occupied.
Is this iron adz colonial period? Is there a way to determine the age?
Thanks!

 

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[snaps]

Its cool I know that!

 

[dfx'er]

looks like a mattox or "grub hoe"

 

[Garscale]

It's an eye hoe