| Koenenites cooperi Squaw Bay Fm. Alpena, Michigan Size: Largest Ammonites/Goniatite is 4.4 cm at its widest. There are 3 specimens on this rock. Price: $50 US ID number: f2731 | 
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| Koenenites cooperi Squaw Bay Fm. Alpena, Michigan Size: Largest Ammonites/Goniatite is 4.4 cm at its widest. There are 3 specimens on this rock. Price: $50 US ID number: f2731 |
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