Merry Christmas to all and may Santa bring you lots of nice fossils! For the curious this image is a composite of four different fossils...

The Pentremites blastoid named by Thomas Say in 1825 (maybe in the Journal of Academy of Natural Sciences of Philadelphia, volume 4, p.294)...

A series Archimedes bryozoan fossils found in Crawford County, Indiana. These creatures existed in the Mississippian Period. When researc...