The Lower Burrator Quarry exposes granite intersected by a series of joints. Joints are fractures in the granite resulting from stresses caused by cooling, by pressures from earth movements or by the removal of a load when the rocks once above the granite are eroded away.
A booklet entitled ‘The evolution of a Dartmoor Landscape – exploring Burrator’ by Peter Keene, gives more detail on the geology of the quarries and the Burrator area in general. It is available to download or purchase from the Dartmoor National Park Authority website.
Burrator is a Site of Special Scientific Interest and is managed by the South West Lakes Trust.