GENERAL GEOLOGY

Detailed explanation-1: -Yu et al/NIGPASThe preserved ammonite fossil encased in amber along with X-ray scans (right) of the specimen. Scientists have uncovered an ancient ammonite fossil perfectly preserved in amber-and it’s a whopping 99 million years old.

Detailed explanation-2: -Ammonites first appearing in the fossil record 240 million years ago, descending from straight shelled cephalopods. The last lineages disappeared 65 million years ago at the end of the Cretaceous. A Middle Jurassic, fossil ammonite of the genus Stephanoceras from Switzerland.

Detailed explanation-3: -Palaeontologist Mary Anning is known for discovering a multitude of Jurassic fossils from Lyme Regis on England’s Dorset Coast from the age of ten in 1809.

Detailed explanation-4: -An official gemstone since 1981, ammolite comes from the fossilized shell of ancient marine mollusks, called ammonites, that lived in the Bearpaw Sea approximately 75 to 70 million years ago. A unique fossilization history has resulted in the rainbow of colours that adorn this beautiful gemstone.

Detailed explanation-5: -The earliest ammonites originated from within the bactritoid nautiloids, appearing during the Devonian (about 409 million years ago), and the last surviving lineages went extinct at the close of the Cretaceous–Paleogene (K-Pg) extinction event (66 million years ago).