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: Ci175
: Geological Maps & Plans
: Map
: Geological survey of Great Britain sheet 75 SW Harlech
: Geological map of Welsh coastline between . Porth Nigel, St Tudwals Islands, Pwllheli and Criccieth.
: Ordnance map office
: 01 Jun 1840
: United Kingdom of Great Britain and Northern Ireland (UK) / Wales, Northern Europe, Europe: Welsh coastline between Porth Nigel, St Tudwals Islands, Pwllheli and Criccieth
: 1831
: 01/06/1840