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Amgueddfa Cymru – Museum Wales
Chart showing section sunk through strata at Celynen, Celynen North, Abercarn and Cwmcarn Collieries Seams shown at Abercarn Colliery and Celynen Colliery Tillery, Rock Vein No.1 seam, Elled Vein, Big Vein, Threequarter Vein, Black Vein, Yard Vein, Meadow Vein, Old Vein Seams shown at Cwmcarn Colliery, Coal No.1 seam, Rock Vein, Elled Vein, Big Vein, Threequarter Vein, Black Vein, Yard Vein, Meadow Vein and Old Vein
