1. Cropwell Bishop gypsum quarry.
Cropwell Bishop gypsum quarry. The quarry face shows beds and nodules of gypsum in the reddish-brown Cropwell Bishop Formation below the blue–green Blue Anchor Formation, which is overlain by black shales and grey clays of the Penarth Group. In the centre of the face a minor fault displaces the strata by a small amount (photograph BGS © NERC).
F. G. Bell et al. Geological Society, London, Engineering Geology Special Publications 2009;22:1-24
© The Geological Society of London 2009