Not sure

[Blackfoot58]

I found these this morning. Appears to be some type of sedimentary rock. I’d say too dense and hard for sandstone or limestone. The fossil caught my eye initially. The piece on the right is the same material but no fossil. They were found a few feet apart in SE Iowa. These rocks are very solid, not crumbly at all.

 

Amazon Forum Fav 👍

Family Maps of Hinds County, Mississippi, Deluxe Edition - Grab it through Amazon!