384 MU^ERAL BASO^ff 



ilinerai Bason feet, v^hlch make 24^ feet, making in all 9^ feet ; besides a 

 ^^^'*^'^^^''^^' number of smaller veins from la to 18 inches, and from 6 to 

 12 inches in thickness, not calculated upon. 



11. By taking the average length and breadth of the fore- 

 going different strata of coal, the amount is about 1000 square 

 miles, containing 95 feet of coal in 23 distinct strata, which 

 will produce in the common way of working 100,000 tons per 

 acre, or 64,000,000 tons per square mile. 



12. If the whole extent of this mineral country was an even 

 plain, the border or outbreak of each stratum would appear re- 

 gular and true ; but owing to the interposition of hills, valleys* 

 the edges of the strata, if nicely measured and planned, 

 would seem indented and uneven, yet in many in tances the 

 due range is totally thrown out of course, in consequence of 

 knots, dikes, or faults. 



13. These faults or irregularities arc not confined to the 

 edges of the strata, but they take grand ranges, through the 

 interior of the bason, generaly in a north and south directionj, 

 and often throw the whole of the strata, for hundreds of acres 

 together, 40, 60.80, or I GO fathoms, up or down, and still 

 there is seldom any superficial appearance, that indicates a 

 disjunction, for the largest faults frequently lie under even sur- 

 faces. 



14. As every stratum rises regularly from its base to the sur- 

 face, and frequently visible and bare, in precipices and deep 

 dingles, and often discovered where the earth or soil is shallow 

 in trenching, or in forming high roads, and by reason of the 

 whole of the cov.ntry within this boundary being so perforated 

 by pits, and so intersected by the various operations of art and 

 nature, it is not probable that any vein of coal, iron orfe, or 

 other stratum remains undiscovered in this mineral bason. 



15. Glamorganshire engrosses far the greatest porfion of 

 coal and iron ore, Monmouthshire the next in point of quan- 

 tity, Carmarthenshire the next, Pembrokeshire the next, and 

 Brecknockshire possesses the least. 



16. The strata of coal and iron ore in the last named county, 

 which are the lowest in the bason, break out northward, and 

 only take place in the three following distinct spots, viz. ist. 

 From TurchRiver (which is the boundary between Lord Ca w- 

 JDOR and Chahles Morgaw £sq. ) across the river Tawe and 



the 



