The Ancyrocrinus spinosus? crinoid from the Middle Devonian Period (406-385 million years ago). These crinoids were found in North Vernon ...

I am not sure what this fossil is. It was found in Speed Quarry, Clark County, Indiana in Jeffersonville(?) Limestone. It is a Devonian Per...

This microscope image of an Ordovician Period cornulite worm tube with a bryozoan growing on it. I guess it could be the other way around wi...