half moon stone blade/ possible carvings.

[beau7johnson]

was looking through old rocks i had tossed into a the garden since the weather was so nice today and came across this super sharp half moon shaped edge blade with a bunch of points and pieces. It looks like there may be some carvings or markings i'm unfamiliar with. Any help identifying is appreciated.
THanks, Beau
p.s. found in central Kansas, if relevant.

 

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[Charlie P. (NY)]

Rock.

 

[Indian Steve]

I agree with Charlie P.

 

[against the wind]

A chipped rock.

 

[HuntinDog]

Broken Alien throwing disk