The quarry exhibits pale to dark grey Carboniferous Limestone with small area of overlying horizontally bedded buff-coloured Jurassicoolitic limestone forming an angular unconformity, with extensive dolomitisation of top of the Black Rock Limestone. There are abundant near-vertical fissures and joints near top of limestone with karst weathering and minor pinnacle formation.[1]
The quarry has been the object of protests against its impact on the environment and has had to appeal against planning application decisions because of the claimed derogation of river flows, groundwater abstractions and local
springs due to historic dewatering associated with the quarry.[2]
Hanson runs a study centre for school children close to the quarry.[3]