Fossilised Sea Urchin, English North East Coast Fossil, Unmodified Seaham Rock, Sea Natural 
 
The oldest coral fossils are over 500 million years old. The earliest forms were different from those we see today and they died out 225 million years ago. 
This fossil is part of a coral reef that existed in a tropical sea "Zechstein Sea that covered much of what is now Europe. When sea levels began to rise, the desert sands were inundated and overlain with calcium magnesium carbonates which included fossilized coral reefs that together formed the Magnesian Limestone over eons of time." - England's North East - (2020) ROCKING THE REGION’S HISTORY
Dimensions: 35mm x 32mm x 15mm