This picture is of a set of crinoid pentagon shaped fossils that once made up a column. They existed in the Mississippian Period. The fossils were found in Carwood Formation (part of the Borden Group) of Washington County, Indiana USA.
There are also a few impressions of brachiopods and near the bottom left corner a spiral shape that I am not sure what kind of creature it belonged to.
Thanks to Kenny for the picture.
Hello friend, i have a question about a pentagonal fossil, can you please advise me what could have left a regular pentagon imprint? size 5cm, thank you for your help Pavel. I can send photos to your e-mail if you send me an e-mail with your address.🙂
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