Polished Ammonite Split Pair - 3.666" Cleoniceras trex 42" Ordovician Ophiurida Brittle Star

42" Ordovician Ophiurida Brittle Star

Nearly 95% of all life perished

The process begins when wood is buried underneath sediment or volcanic ash

970" wood fragment of the original 1923 sign salvaged during the reconstruction

It was recovered from deposits in Morocco and dates to the Late Cretaceous Period

Polished Ammonite Split Pair - 3.666" Cleoniceras trex 42" Ordovician Ophiurida Brittle StarAmmonites are an extinct group of cephalopods that entered the fossil record 400 million years ago. This specimen is a 3. 666" polished Cleoniceras fossil from Madagascar. The fossil has been split into a paired set to showcase the beautiful internal chambers of the shell. These internal chambers are called septa and the ammonite could fill them with air in order to float through the ocean like a balloon. After millions of years, they are now