Purbeck Mineral and Mining Museum
After the closure of Eldon sidings all clay exports were via lorry. For several years the clay was carried from the mines across the A351 by trains to the "Lorry Drop". It was realised that the lorries could take the clay directly from the mines and the cost of maintaining a railway system avoided. The transhipment buildings were raised to accommodate the lorries beneath them and in the early 1970s the railway system sold partly into preservation and the rest scrapped. Use of narrow gauge railways continued underground at Norden No 6 & 7 mines until all mining operations ceased in 1999.
Ub, Serbia
The following table gives a preview of total number of employed people per their core activity (as of 2016):
There are several mines and resource centers of coal (Radljevo field - 344,000,000 tones, Zvizdar field - 280,000,000 tones), clay, sand, stone and limestone.
The biggest producer of quartz sand in Serbia is "Kopovi a.d.", with overall production of over 400,000 tones per year. 
Clay pits are based below the layers of sand and quartz sand. Municipality of Ub is the biggest supplier of high-quality clay in Serbia. There are more than 1,800,000 tones of clay.