Viaduct Quarry () is a 0.3 hectare geological Site of Special Scientific Interest near Shepton Mallet on the Mendip Hills in Somerset, notified in 1984.
This disused quarry is a Geological Conservation Review site identified as the best exposed and thickest section in the Downside Stone, a localised limestone development which accumulated adjacent to the Lower Jurassic Mendip Island.
See also Quarries of the Mendip Hills
Sources English Nature citation sheet for the site (accessed 9 August 2006)
External links English Nature website (SSSI information)