Hi, I found this fossil at the beach of the lake Ivö-sjön. As far as I know there are two geological periods present with fossils, old and young cretaceous. The only other fossil I ever seen on the particular location this fossil was found, are ortoceras, or more precisely - probably bellemnellocamax(?)   This is quite the big fossil from what you normally would find here. It looks like an underwater plant of some sort? I wonder what it could be?   The complete soli