WHAT ARE PYRITE AMMONITES
AMMONITES REPLACED BY PRYITE! FROM THE VOLGA RIVER AREA, SARATOV, RUSSIA. ABOUT 150 MYA, DURING THE JURASSIC PERIOD, THESE AMMONITES DIED IN A SEA THAT CONTAINED A HEAVY CONCENTRATION OF IRON. THIS IRON REACTED WITH SULFUR IN THE WATER AND FORMED THE IRON PRYITE WHICH REPLACED THE AMMONITE CELL BY CELL. THE OUTER SHELL SOMETIMES REMAINED BUT THE CHAMBERS WERE REPLACED WITH PYRITE. SEE THE MANY DIFFERENT TYPES OF AMMONITES IN THE FOLLOWING PICTURES.