Strange rock with markings

[Mattsartafact]

Found this rock at laurel creek in Virginia, right by the river. It?s got weird markings on it, and the rock is really square. Anyone got a idea? Thanks

The markings look like a little square and beside it a circle

 

[GaRebel1861]

It may be the remains of an old brick. Just a thought.

 

[bowwinkles]

Petrified sponge.

 

[Back-of-the-boat]

It looks like a clay brick that has been worn down in the river.

 

[GoldieLocks]

Try to do a rubbing and get clearletters off of it?

 

[islamoradamark]

Welcome to Treasurenet

 

[Mattsartafact]

Thank y’all so much for the help. What should I use? A bristle brush and water?

 

[ANTIQUARIAN]

It looks like a clay brick that has been worn down in the river.

I agree, great I.D. Steve.

Welcome to Tnet from Toronto Matt.
Dave