Total area in Lincolnshire (approx.): 142ha
Total area within Critical Natural Asset & Basic Natural Stock Sites (approx.):
10ha in 5 sites.
Lincoln lies in a broad gap created in the Jurassic limestone uplands by the River
Witham. North of
the city the limestone forms a narrow ridge with a steep western scarp whilst to the south it widens
into a broad plateau.
There are only four sites identified as Critical Natural Asset or Basic Natural Stock
which contain
substantial areas of limestone grassland in Lincoln (Greetwell Hollow; South Common; Dean and
Chapter Quarry; Old Quarry). However none of these patches of calcareous grassland exceeds 4
ha. Small fragments of calcareous grassland occur under scrub and in other old quarries but are
too small to be accurately measured. However new chalk and limestone exposures ( for example
those at Greetwell Hollow Quarry) provide opportunities for colonisation by specialised plants,
although few are old enough to have developed the characteristics and ecosystem of ancient
grassland.