The geology of Strelley, which I copied from the geology plans *at* Cossall Colliery when I visited in 1962. I had the pleasure of actually going down the drift mine for a whole day. Quite an experience seeing it actually working!
And this map shows the position of all of the old bell pits
Note that the red lines are fault lines, the dash on the line shows the side of displacement, together with the number of feet displaced by the fault. The faults on the map showing the bell pits show that the dip of the strata is 1 in 20, but the fault had a displacement of 20 feet, which meant that t