I found these while on a field trip to a quarry.
~221-195 million years old
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| Ammonites. The one on the left is opalized. These critters died out at the same time as the dinosaurs, ~65 million years ago. | |||||||||||||||||||
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| Fossils from the Ordovician Decorah Group. I found these while on a field trip to a quarry. ~221-195 million years old |
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| More Decorah Group fossils, mostly brachiopods. | |||||||||||||||||||
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| Geology Page | |||||||||||||||||||
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