The engineering geology of the Nottingham area, UK ...
The gypsum in the Middle White Rock is white in colour and is medium to coarsely crystalline. It contains very fine veins of gypsiferous mudstone and a few mudstone inclusions that tend to stain the surrounding gypsum. It contains between 5 and 10% of impurities. ... Bulk density tends to increase with increasing clay content. As far as the ...