Large Turitellas (60-100mm) from Morocco.

Turritella fossils are fascinating remains of ancient marine life. The genus Turritella consists of medium-sized sea snails with tightly coiled, elongated cone-shaped shells1. These fossils are often found in sedimentary rock formations and date back to the late Jurassic period. It is indeed fascinating that a type of fossiliferous agate known as Turritella Agate is commonly found in the Green River Formation in Wyoming. Despite the name, the fossils in this agate actually come from a freshwater snail called Elimia tenera, and not the marine Turritella. The agate is easily recognized by the many spiral-shaped snail shells embedded in it.