Morton Colliery post-vesting records The site of Morton Colliery comprised two pits that were sunk by the Clay Cross Company between 1863 and 1874. It worked the Silkstone, Blackshale, Threequarter and Deep Hard coal seams. The two pits were known later as Clay Cross No. 5 and No. 6. The colliery was transferred into the control of the National Coal Board following the nationalisation of the coal industry in 1947, being put in the Eadt Midlands Division Area No. 1 . The colliery eventually closed in 1965, just over a century after it was first sunk. [mid 20th cent]