An exploration of the microscopic fossil world of the Ordovician Period uncovered this cluster of tube like fossils. Is it some sort of cor...

My search for Ordovician Period microfossils led me to this little jewel. It appears to be the spine of an echinoid. The tube size is abou...

Here is a closeup of a Foerstephyllum  (Bassler, 1941) colonial coral fossil for the Upper Ordovician Period. It was found in Louisville, K...