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ammonite suture patterns

Ammonite suture patterns - these dendritic patterns are the line of intersection between the ammonite's shell and its septa, which are the walls it built as it extended its shell.


Ammonites are perhaps the most widely known fossil, possessing the typically ribbed spiral-form shell as pictured above. These creatures lived in the seas between 240 - 65 million years ago, when they became extinct along with the dinosaurs.

Starfish fossils, this is so cool... from Charmouth on Dorset's Jurassic Coast This starfish fossils cluster is mesmerizing! Credit: tripadvisor Geology Wonders

Starfish fossils from Charmouth on Dorset's Jurassic Coast Credit: tripadvisor Geology Wonders

Fossil - 70 million year old Ammonite

Gem Ammonite, a 70 million-year-old fossil of a mollusk found in British Columbia. Ammolite is one of the world's rarest gems.