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Featured Fossil


This page features a fossil with details about the specimen, its age,

where it was found, and a nugget of interesting information. Not every

specimen will be perfectly preserved - but all are a marvel of the natural world!

All geological time periods are represented.


Cephalolpod Nanno species = Proterovaginoceras belemniforme from Minnesota

Fossil Type:



Nanno sp. = Proterovaginoceras belemniforme (Holm)


Decorah Shale


Upper Ordovician


Sogn, Goodhue Co., Minnesota


An endocerid where the siphuncle fills the apex of the shell. Nanno is not a taxonomic name, but a morphologic preservation. It resembles the Mesozoic Belemnites. Anonymous collection. Scale = 2 cm

Date Posted:

February 18, 2017


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Created April 12, 2012