Tiny fossil sponges? Corals?

[rynoceras]

Hi all -

I found all three of these unusual fossils in Late Ordovician deposits (Decorah) near Cannon Falls, Minnesota. I've been collecting in these deposits for several decades and never before came across this type of fossil until recently. And only these three. They've been accessioned by the Science Museum of Minnesota. As of yet, no one has been able to identify them. Thanks!

[Editted by rynoceras on 06-09-2014 at 00:56 GMT +1]

[Editted by rynoceras on 06-09-2014 at 01:10 GMT +1]

[Jeremy]

Hello,

the structure as seen on the pictures ressembles a lot with the typical form of Lichenopora, a Bryozoa. Unfortunatly the Ordovician does not fit in this idea.

greetings
Jeremy