Halnaker Chalk Pit

Halnaker Chalk Pit is a 6.4-hectare (16-acre) biological Site of Special Scientific Interest north-east of Boxgrove in West Sussex.^[1][2]

LocationWest Sussex

Grid referenceSU 921 089^[1]

InterestBiological

Area6.4 hectares (16 acres)^[1]

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Halnaker Chalk Pit

Site of Special Scientific Interest
Location	West Sussex
Grid reference	SU 921 089[1]
Interest	Biological
Area	6.4 hectares (16 acres)[1]
Notification	1992[1]
Location map	Magic Map

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This chalk pit is important as it has about 50% of the British population of a nationally rare and vulnerable plant, broad-leaved cudweed. Other plants include hoary plantain, scarlet pimpernel, bent grass, yellow-wort and autumn gentian.^[3]

The site is private land with no public access.