Polished Ammonite Split Pair - SOLD 3.316" Cleoniceras necklace "Extraterrestrial cause for the Cretaceous-Tertiary

"Extraterrestrial cause for the Cretaceous-Tertiary extinction

An informational card with the Mini Museum Seal of Authenticity is included

if you open the specimen jar

Recent petrographic studies have closely linked chippings from these dolerite bluestones to the bluestones installed at Stonehenge roughly 4

Polished Ammonite Split Pair - SOLD 3.316" Cleoniceras necklace "Extraterrestrial cause for the Cretaceous-TertiaryAmmonites are an extinct group of cephalopods that entered the fossil record 400 million years ago. This specimen is a 3. 316" 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