Need help identifying this please???

[Landon"s Mom]

Found in Northeast Arkansas. 5"×4" and pretty heavy. Any help would be appreciated!

 

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[SusanMN]

What is this? Is it Coprolite?

No picture attached.

 

[vpnavy]

I moved ya from HELP! over to WHAT IS IT? for more exposure.

 

[blauer]

Looks like a mass of Limonite or Siderite given it's heft and color.