Geological survey of Northern Ireland: 1:50,000 : Bedrock and superficial deposits.
Keyworth : British Geological Survey for the Geological Survey of Northern Ireland,
1982-
Earlier eds.: Drift ed./ solid and drift published by the Ordnance Survey for the British Geological Survey, then Geological Survey of Northern Ireland.
Graphic index in UK geology file and Map reading room.
Maps either flat or (latterly) folded.
Sheet 11. Londonderry (1995, flat) -- Sheet 13. Coleraine (1999, flat) -- Sheet 18. Dungiven (2007, flat) -- Sheet 20. Ballymena (2001, flat) -- Sheet 21. Larne (1994, flat) -- Sheet 26. Draperstown (1995, flat) -- Sheet 27. Cookstown (1985) -- Sheet 28. Antrim (1994, flat) -- Sheet 32 and 31. Kesh (1994, flat) -- Sheet 33. Omagh (1995, flat) -- Sheet 47. Armagh (1985, flat)