Stone mason Archie Faiers decided to go hunting for prehistoric relics after watching Attenborough and the Sea Dragon.
The 21-year-old took his dogs for a walk along the Jurassic Coast in southern England and within minutes spotted an interesting rock in earth disturbed by a recent cliff fall.
That interesting rock turned out to be a 190-million-year-old Microderoceras Birchi, typical of the ammonites found in that area of the coast.
Archie, named the UK’s top young Architectural Stone Mason, was on the Jurassic Coast beach between Seaton and Lyme Regis when he made the discovery.
He was just yards from where Sir David filmed the recovery of a large Ichthyosaur, or Sea Dragon, which was broadcast on the BBC two weeks ago.
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Archie, from Uplyme, Devon, said “I knew we were close to the spot where the TV fossil was found, there had been an overnight cliff fall and I spotted a rounded rock on the beach.
“I knew that these rocks are the ones that could have a fossil inside.”
Archie heaved the heavy rock back along the beach into his workshop.
He added: “I started to chip away at the outside off the rock and I soon realised that there was an ammonite inside.
“I’m using my traditional stone mason tools in preparing it but I need much finer tools so things are on hold at the moment.”