Parkinsonia dorsetensis ammonite fossil found in England.  The creature lived in middle Jurassic Period (174-164 million years ago).  Spe...

Bottom of an Eucalyptocrinus elrodi (Miller, 1891) crinoid calyx with a partial covering of pyrite crystals.  Found in the Waldron Shale o...

Trilobite cephalon found in the Waldron Shale.  Middle Silurian Period was the age this creature lived.   It appears to be a Glyptambon v...