Campaigners are opposed to plans to reopen a quarry in County Cornwall, south-west England.
The quarry is likely to supply Cornish stone for a proposed tidal energy project in Swansea Bay, Wales.
It is reported that Shire Oak Quarries is pursuing plans to reopen the quarry near St Kevergne, which would supply around 3 million tonnes of stone for the tidal project.
Tidal Lagoon Power, the company behind the Swansea project, is reported as saying no decision to use Cornish stone has been made.
Local campaigners have joined forces as Cornwall Against Dean Super Quarry to fight the reopening.
