The incline mainly carried dolerite quarried on Clee Hill. This rock is known as Dhustone, "black rock" in our dialect.
Dhustone is nolonger used as roadstone, it polishes to easily. Now the quarried rock from Clee Hill is remelted, some 270 million years after it was last molten and spun into rockwool for house insulation.
The metal deposits were further north around Stiperstones. Lead ore and barytes were the main minerals. There is still coal under the land around the Clees. Every now and then an attempt to start opencast mining is made. Given the beauty of the area, these fail.