Subcategories of Economic geology
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Diatomite 16
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Diatomaceous earth 12
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Building stones, sandstone 55
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Slates 62
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Coal 56
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Metalliferous mining, iron ore 16
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Roadstone 60
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Building stones, granite 14
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Boring and prospecting 32
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Bauxite 9
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Quarries 214
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Opencast coal 32
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Building stones 99
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Peat 36
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Bricks, clay and marl quarries 118
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Cement and lime, limestone quarries and chalk pits 140
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Gypsum 34
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Metalliferous mining, tin 79
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Building stones, limestone 92
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Gravel and sand 109
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China clay 78
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China stone 6
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Metalliferous mining: wolfram 12
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Quarries, opencast 83
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Building stones, artificial 3
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Barytes 19
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Ganister and fireclay 10
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Colleries 12
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Ball clay 21
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Metalliferous mining, ironstone, opencast 51
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Metalliferous mining, lead 8
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Grindstones 5
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Metalliferous mining, iron, haematite 3
