Ammonite Fossils with Spiked Spines / 1.5-2.5" AVG - 1 KILO LOT

Quantity: 1 kilogram

Average size range: 1.5 to 2.5 inches

Ammonites were spiral-shelled animals that lived hundreds of millions of years ago, and are most closely related to modern-day octopi and cuttlefish than mollusks. The fossils for these species are so widespread that paleontologists and geologists use them as index fossils to determine when rock layers formed.