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