1. Ganister mining and quarrying were other industries that grew in the area.2. There were three ganister mines in the immediate Worrall area. 3. Coal, iron ore, ganister , and limestone are found in the vicinity. 4. The permanent ones took longer, encountering beds of ganister , coal and rock. 5. Materials may include calcium aluminate cements, fire clay, ganister and minerals high in aluminum. 6. In the vicinity are found bituminous coal, ganister rock, fire clay, and some timber. 7. Where a ganister underlies coal as a seatearth, it typically is penetrated by numerous root traces. 8. The seat earths of the seams yielded ganister ( needed for furnace linings ) and fire clay. 9. Ganister ( hard sandstone ) and dolerite ( whinstone, basalt ) have also been quarried in the past in Weardale.10. Large quantities of locally occurring fireclay were also exploited, as well as ganister ( a clay used to make refractory furnace linings ).
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