Fossil or Just a Strange Rock ?

[cpc988]

Hey everybody!
Today, I found this rock in a creek in east Texas. It has four strange grooves /markings on it . Possibly could have been used with maybe rope or is it a fossil ? Any ideas ?It is very light .

 

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[Harry Pristis]

Hey everybody!
Today, I found this rock in a creek in east Texas. It has four strange grooves /markings on it . Possibly could have been used with maybe rope or is it a fossil ? Any ideas ?It is very light .

Probably just a geofact.