362 . MINERAL DASOiV IN WALES. 



length on the south side of the bason from Pontypoo! 

 through Risca, Tinkwood, Llantrissent, Margam, Swansea 

 Bay, and Cline -Wood, to Llanmaddock Hill, and on the 

 north side through Biarnafon, Ebbw, Sirhowy, Merthyr, 

 . , Aberdare, Aberpergwm, Glyntowy, Llandibie, and the 

 Groat Mountain, to Pcmbrey Hill, near Llanelly in Car- 

 marthenshire, and their depths are at the centre range of 

 strata from G to 7G0 fathoms. 

 Strata running 6. The strata of coal and iron ore running from Pern- 

 m™then bay' ^7 HilI > tnrou S h Carmarthen Bay and Pembrokeshire to 

 and Pembroke- St. Bride's Bay, are only a continuation of those in the 

 shir*. counties of Glamorgan and Carmarthen, which lie next to 



and parallel with the north side of the bason, all the re* 

 maining strata rising southward ; and the middle ranges on 

 the north side of the bason, are lost between where they 

 meet the sea near Llanmaddock Hill and the south side of 

 Pembrey Hill, iu their course towards Pembrokeshire, in 

 consequence of a contraction of the sides of the mineral 

 bason, or rather by its becoming shallower ; for in Pem- 

 brokeshire none of the strata of coal or iron ore lie above 

 80 or 100 fathoms deep, consequently all those which do 

 not lie above 5 or 600 fathoms in Glamorganshire and Car- 

 marthenshire have not reached this county, by reason of 

 the bason not being of sufficient depth and width to hold 

 them. 

 Strata at the 7. The strata of coal at the east end of the bason run, 



east end of the ning f rom p on typ ol to Rlaenafon and Clydach, and on the 

 north side from thence to Nanty Glo, Ebbw, Beaufort, 

 Sirhowy, Tredegar, Romney, Dowlais, Penderryn, Ply- 

 mouth, Cyfarthfa, Abernant, Aberdare and Hurwain Fur- 

 naces and Iron Works, are of- a cokeing quality, and 

 thence the whole strata of coal to St. Bride's Bay alter 

 in their quality to what is called stone coal, (the large of 

 which has hitherto been used for the purposes of drying 

 malt and hops, and the small, which is called culm, for 

 burning of limestone); the several strata of coal from Pon- 

 typool, on the south side of the bason, through Risca 

 Llan dissent, Margam, and Cline Wood, to Burry River, 

 Llantlly, and the south side of Pembrey Hill, are prin- 



cipally of a bitumiuous or binding quality. 



8. Notwithstanding 



