HannahB Posted February 3 Share Posted February 3 hi, i was given some interesting looking rocks. as far as i’m aware they were collected in the carboniferous deposits of northumberland. i cant tell if they’re fossils or just cool concretions… anyone know? Link to comment Share on other sites More sharing options...
Rockwood Posted February 3 Share Posted February 3 The first one looks like concretion. The second one just might be a branching rugose coral, but the indications aren't at all clear. 1 1 Link to comment Share on other sites More sharing options...
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