Byline: David Powell
CAVERS have unearthed a 3,500-year-old Bronze Age chamber at the Great Orme Copper Mines.
The thrilling discovery marks the end of a five-year search for another mine in Llandudno's prehistoric labyrinth.
Tools made from animal bones and hard stones were left lying around untouched by human hand for millennia.
They were found discarded in the cavern.
Great Orme Mines manager Nick Jowett, 32, and 22-year-old Patrick Hammond - son of the Great Orme Mines' managing director Tony - made the find during routine excavations last Wednesday.
They tapped through into a tunnel and scraped their way inside the dank chamber.
And Mr Hammond jnr, a keen mountaineer who has scaled most of the Eiffel Tower, said: "Nick made the final breakthrough. I'll do the next one."
Mr Jowett said: "We found a chamber with workings off it partly filled with waste material of limestone rubble.
"There were 30 animal bones literally lying around on the surface and eight to ten stone hammers. When these tunnels are excavated these figures will rocket to tens of stone hammers."
Those animal bones will have mainly come from cattle, but also sheep, goats, deer and wild boar and been used to eke out valuable minerals for metalwork and jewellery.
The original miners would have been looking for deep green malachite - which is copper ore - between great pillars of unmineralised limestone rock.
Mr Jowett said: "We're delighted.
It's still as exciting as it ever was to find a chamber like this. …