| 41. | Raniganj Coalfield covers an area of and has total coal reserves of.
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| 42. | Major portions of Mahanadi Coalfields are situated on the banks of Ib.
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| 43. | The following coal seams are recorded from the Durham coalfield.
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| 44. | The Western Coalfield has been hit much harder by acid rain regulations.
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| 45. | The Pench Kanhan Valley Coalfield is situated to the northwest of Chhindwara.
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| 46. | This Upper Carboniferous outcrop is part of the Ibbenb�ren Coalfield.
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| 47. | The Godavari Valley Coalfield is divided into twelve coal belts.
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| 48. | The is the oldest mine of the Ishikari coalfield of the Hokkaido.
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| 49. | The county contained several mill towns and the collieries of the Lancashire Coalfield.
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| 50. | The Somerset Coalfield is part of a larger coalfield which stretches into Gloucestershire.
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