Fossil Friday!

This week on Fossil Friday, I bring you a gift(!) from our Fossil Friend, Dan Coleman! According to Dan:

“It is from the early Mississippian Buford limestone found in south-central Indiana. It was collected in a creek bed where tons of specimens wash out of the rock layers. This was/is in Lawrence County, Indiana, home of the famous limestone quarries that built many buildings and monuments, including the Empire State Building.  Many different fossils and geodes are found here, including crinoids, brachiopods, and...” whatever this is! Can you tell what it is?