Baddadcp Posted September 16, 2018 Share Posted September 16, 2018 Found this little item in my rock bar that has me stumped. Has too much form to be a "concretion", but not enough to try to get a bone ID. It came from a Maryland Creek in the Arundel "formation" Potomac "group". Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted September 16, 2018 Share Posted September 16, 2018 Ironstone concretion for me. They're not always round or a regular shape. Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Baddadcp Posted September 16, 2018 Author Share Posted September 16, 2018 1 hour ago, Tidgy's Dad said: Ironstone concretion for me. They're not always round or a regular shape. You are 100% correct. The one in the background is an ironstone concretion. I am referring to the one in front. It is mud stone. I know it's hard to tell in a pic, but I did tag it as mud stone. Link to comment Share on other sites More sharing options...
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