Nightingale Valley () is a 5.4

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

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 ...

near the town of Portishead,

North Somerset North Somerset is a unitary authorities of England, unitary authority in the ceremonial county of Somerset, England. The council is based in Weston-super-Mare, the area's largest town. The district also contains the towns of Clevedon, Nailsea ...

, notified in 1989. This site in the Vale of Gordano is listed because of

Pleistocene The Pleistocene ( ; referred to colloquially as the ''ice age, Ice Age'') is the geological epoch (geology), epoch that lasted from to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fin ...

‘plateau-deposits’ which include ‘cannon-shot’ gravels, fine sandy gravels and silty gravels with a wide range of erratic

lithologies The lithology of a rock unit is a description of its physical characteristics visible at outcrop, in hand or core samples, or with low magnification microscopy. Physical characteristics include colour, texture, grain size, and composition. Lith ...

.English Nature citation sheet for the site
(accessed 12 July 2006)

References

Sites of Special Scientific Interest in Avon Sites of Special Scientific Interest notified in 1989 {{England-SSSI-stub