Brinkmarsh Quarry () is a 0.5

hectare The hectare (; SI symbol: ha) is a non-SI metric unit of area equal to a square with 100-metre sides (1 hm2), or 10,000 m2, and is primarily used in the measurement of land. There are 100 hectares in one square kilometre. An acre is a ...

geological Site of Special Scientific Interest A Site of Special Scientific Interest (SSSI) in Great Britain or an Area of Special Scientific Interest (ASSI) in the Isle of Man and Northern Ireland is a conservation designation denoting a protected area in the United Kingdom and Isle of ...

near the town of

Thornbury, South Gloucestershire Thornbury is a market town and civil parish in the South Gloucestershire Unitary authorities of England, unitary authority area of England, about 12 miles (19 km) north of Bristol. It had a population of 12,063 at the 2011 UK census, 2011 Census ...

, notified in 1974.

Sources

English Nature citation sheet for the site
(accessed 9 July 2006) Sites of Special Scientific Interest in Avon Sites of Special Scientific Interest notified in 1974 Quarries in Gloucestershire Thornbury, Gloucestershire {{England-SSSI-stub